mirror of https://gitee.com/openkylin/linux.git
591 Commits
| Author | SHA1 | Message | Date |
|---|---|---|---|
Ravi Bangoria
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6963d3c387 |
perf list sdt: Show option in man page
Commit
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Andi Kleen
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bf874fcf9f |
perf list: Move extra details printing to new option
Move the printing of perf expressions and internal events to a new
clearer --details flag, instead of lumping it together with other debug
options in --debug. This makes it clearer to use.
Before
perf list --debug
...
unc_m_power_critical_throttle_cycles
[Cycles all ranks are in critical thermal throttle. Unit: uncore_imc]
uncore_imc_2/event=0x86/ MetricName: power_critical_throttle_cycles % MetricExpr: (unc_m_power_critical_throttle_cycles / unc_m_clockticks) * 100.
after
perf list --details
...
unc_m_power_critical_throttle_cycles
[Cycles all ranks are in critical thermal throttle. Unit: uncore_imc]
uncore_imc_2/event=0x86/ MetricName: power_critical_throttle_cycles % MetricExpr: (unc_m_power_critical_throttle_cycles / unc_m_clockticks) * 100.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/r/20170320201711.14142-14-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Andi Kleen
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430daf2dc7 |
perf stat: Collapse identically named events
The uncore PMU has a lot of duplicated PMUs for different subsystems.
When expanding an uncore alias we usually end up with a large
number of identically named aliases, which makes perf stat
output difficult to read.
Automatically sum them up in perf stat, unless --no-merge is specified.
This can be default because only the uncores generally have duplicated
aliases. Other PMUs have unique names.
Before:
% perf stat --no-merge -a -e unc_c_llc_lookup.any sleep 1
Performance counter stats for 'system wide':
694,976 Bytes unc_c_llc_lookup.any
706,304 Bytes unc_c_llc_lookup.any
956,608 Bytes unc_c_llc_lookup.any
782,720 Bytes unc_c_llc_lookup.any
605,696 Bytes unc_c_llc_lookup.any
442,816 Bytes unc_c_llc_lookup.any
659,328 Bytes unc_c_llc_lookup.any
509,312 Bytes unc_c_llc_lookup.any
263,936 Bytes unc_c_llc_lookup.any
592,448 Bytes unc_c_llc_lookup.any
672,448 Bytes unc_c_llc_lookup.any
608,640 Bytes unc_c_llc_lookup.any
641,024 Bytes unc_c_llc_lookup.any
856,896 Bytes unc_c_llc_lookup.any
808,832 Bytes unc_c_llc_lookup.any
684,864 Bytes unc_c_llc_lookup.any
710,464 Bytes unc_c_llc_lookup.any
538,304 Bytes unc_c_llc_lookup.any
1.002577660 seconds time elapsed
After:
% perf stat -a -e unc_c_llc_lookup.any sleep 1
Performance counter stats for 'system wide':
2,685,120 Bytes unc_c_llc_lookup.any
1.002648032 seconds time elapsed
v2: Split collect_aliases. Rename alias flag.
v3: Make sure unsupported/not counted is always printed.
v4: Factor out callback change into separate patch.
v5: Move check for bad results here
Move merged check into collect_data
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20170320201711.14142-3-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Ravi Bangoria
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efc9c05681 |
perf stat: Correct --no-aggr description
Description of --no-aggr in perf-stat man page is outdated. --no-aggr
can also be used while profiling specific set of cpus. For ex,
$ perf stat -e cycles,instructions -C 1-2 --no-aggr -- sleep 1
Performance counter stats for 'CPU(s) 1-2':
CPU1 5,94,92,795 cycles
CPU2 2,69,72,403 cycles
CPU1 2,02,08,327 instructions # 0.34 insn per cycle
CPU2 73,17,123 instructions # 0.12 insn per cycle
1.000989132 seconds time elapsed
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1490013438-5713-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Andi Kleen
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48d02a1d5c |
perf script: Add 'brstackinsn' for branch stacks
Implement printing instruction sequences as hex dump for branch stacks.
This relies on the x86 instruction decoder used by the PT decoder to
find the lengths of instructions to dump them individually.
This is good enough for pattern matching.
This allows to study hot paths for individual samples, together with
branch misprediction and cycle count / IPC information if available (on
Skylake systems).
% perf record -b ...
% perf script -F brstackinsn
...
read_hpet+67:
ffffffff9905b843 insn: 74 ea # PRED
ffffffff9905b82f insn: 85 c9
ffffffff9905b831 insn: 74 12
ffffffff9905b833 insn: f3 90
ffffffff9905b835 insn: 48 8b 0f
ffffffff9905b838 insn: 48 89 ca
ffffffff9905b83b insn: 48 c1 ea 20
ffffffff9905b83f insn: 39 f2
ffffffff9905b841 insn: 89 d0
ffffffff9905b843 insn: 74 ea # PRED
Only works when no special branch filters are specified.
Occasionally the path does not reach up to the sample IP, as the LBRs
may be frozen before executing a final jump. In this case we print a
special message.
The instruction dumper piggy backs on the existing infrastructure from
the IP PT decoder.
An earlier iteration of this patch relied on a disassembler, but this
version only uses the existing instruction decoder.
Committer note:
Added hint about how to get suitable perf.data files for use with
'-F brstackinsm':
$ perf record usleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.018 MB perf.data (8 samples) ]
$
$ perf script -F brstackinsn
Display of branch stack assembler requested, but non all-branch filter set
Hint: run 'perf record -b ...'
$
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Link: http://lkml.kernel.org/r/20170223234634.583-1-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Brendan Gregg
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292c4a8f98 |
perf sched timehist: Add --next option
The --next option shows the next task for each context switch, providing
more context for the sequence of scheduler events.
$ perf sched timehist --next | head
Samples do not have callchains.
time cpu task name waittime schdelay run time
[tid/pid] (msec) (msec) (msec)
---------- --- ---------- --------- ------ -----
374.793792 [0] <idle> 0.000 0.000 0.000 next: rngd[1524]
374.793801 [0] rngd[1524] 0.000 0.000 0.009 next: swapper/0[0]
374.794048 [7] <idle> 0.000 0.000 0.000 next: yes[30884]
374.794066 [7] yes[30884] 0.000 0.000 0.018 next: swapper/7[0]
374.794126 [2] <idle> 0.000 0.000 0.000 next: rngd[1524]
374.794140 [2] rngd[1524] 0.325 0.006 0.013 next: swapper/2[0]
374.794281 [3] <idle> 0.000 0.000 0.000 next: perf[31070]
Signed-off-by: Brendan Gregg <bgregg@netflix.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1489456589-32555-1-git-send-email-bgregg@netflix.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Hari Bathini
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d890a98c92 |
perf tools: Add 'cgroup_id' sort order keyword
This patch introduces a cgroup identifier entry field in perf report to identify or distinguish data of different cgroups. It uses the device number and inode number of cgroup namespace, included in perf data with the new PERF_RECORD_NAMESPACES event, as cgroup identifier. With the assumption that each container is created with it's own cgroup namespace, this allows assessment/analysis of multiple containers at once. A simple test for this would be to clone a few processes passing SIGCHILD & CLONE_NEWCROUP flags to each of them, execute shell and run different workloads on each of those contexts, while running perf record command with --namespaces option. Shown below is the output of perf report, sorted with cgroup identifier, on perf.data generated with the above test scenario, clearly indicating one context's considerable use of kernel memory in comparison with others: $ perf report -s cgroup_id,sample --stdio # # Total Lost Samples: 0 # # Samples: 5K of event 'kmem:kmalloc' # Event count (approx.): 5965 # # Overhead cgroup id (dev/inode) Samples # ........ ..................... ............ # 81.27% 3/0xeffffffb 4848 16.24% 3/0xf00000d0 969 1.16% 3/0xf00000ce 69 0.82% 3/0xf00000cf 49 0.50% 0/0x0 30 While this is a start, there is further scope of improving this. For example, instead of cgroup namespace's device and inode numbers, dev and inode numbers of some or all namespaces may be used to distinguish which processes are running in a given container context. Also, scripts to map device and inode info to containers sounds plausible for better tracing of containers. Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Aravinda Prasad <aravinda@linux.vnet.ibm.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sargun Dhillon <sargun@sargun.me> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/148891933338.25309.756882900782042645.stgit@hbathini.in.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Hari Bathini
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96a44bbccd |
perf script: Add script print support for namespace events
Introduce a new option to display events of type PERF_RECORD_NAMESPACES
and update perf-script documentation accordingly.
Shown below is output (trimmed) of perf script command with the newly
introduced option, on perf.data generated with perf record command using
--namespaces option.
$ perf script --show-namespace-events
swapper 0 [000] 0.000000: PERF_RECORD_NAMESPACES 1/1 - nr_namespaces: 7
[0/net: 3/0xf000001c, 1/uts: 3/0xeffffffe, 2/ipc: 3/0xefffffff, 3/pid: 3/0xeffffffc,
4/user: 3/0xeffffffd, 5/mnt: 3/0xf0000000, 6/cgroup: 3/0xeffffffb]
swapper 0 [000] 0.000000: PERF_RECORD_NAMESPACES 2/2 - nr_namespaces: 7
[0/net: 3/0xf000001c, 1/uts: 3/0xeffffffe, 2/ipc: 3/0xefffffff, 3/pid: 3/0xeffffffc,
4/user: 3/0xeffffffd, 5/mnt: 3/0xf0000000, 6/cgroup: 3/0xeffffffb]
Commiter notes:
Testing it:
Investigating that double PERF_RECORD_NAMESPACES for the 19155
pid/tid... Its more than that, there are two PERF_RECORD_COMM as well,
and with zeroed timestamps, so probably a synthesizing artifact...
# perf script --show-task --show-namespace
<SNIP>
perf 0 [000] 0.000000: PERF_RECORD_COMM: perf:19154/19154
perf 0 [000] 0.000000: PERF_RECORD_FORK(19155:19155):(19154:19154)
perf 0 [000] 0.000000: PERF_RECORD_NAMESPACES 19155/19155 - nr_namespaces: 7
[0/net: 3/0xf0000081, 1/uts: 3/0xeffffffe, 2/ipc: 3/0xefffffff, 3/pid: 3/0xeffffffc,
4/user: 3/0xeffffffd, 5/mnt: 3/0xf0000000, 6/cgroup: 3/0xeffffffb]
perf 0 [000] 0.000000: PERF_RECORD_COMM: perf:19155/19155
perf 0 [000] 0.000000: PERF_RECORD_COMM: perf:19155/19155
perf 0 [000] 0.000000: PERF_RECORD_NAMESPACES 19155/19155 - nr_namespaces: 7
[0/net: 3/0xf0000081, 1/uts: 3/0xeffffffe, 2/ipc: 3/0xefffffff, 3/pid: 3/0xeffffffc,
4/user: 3/0xeffffffd, 5/mnt: 3/0xf0000000, 6/cgroup: 3/0xeffffffb]
swapper 0 [000] 3110.881834: 1 cycles: ffffffffa7060bf6 native_write_msr (/lib/modules/4.11.0-rc1+/build/vmlinux)
<SNIP>
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Aravinda Prasad <aravinda@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sargun Dhillon <sargun@sargun.me>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/148891932627.25309.1941587059154176221.stgit@hbathini.in.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Hari Bathini
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f3b3614a28 |
perf tools: Add PERF_RECORD_NAMESPACES to include namespaces related info
Introduce a new option to record PERF_RECORD_NAMESPACES events emitted
by the kernel when fork, clone, setns or unshare are invoked. And update
perf-record documentation with the new option to record namespace
events.
Committer notes:
Combined it with a later patch to allow printing it via 'perf report -D'
and be able to test the feature introduced in this patch. Had to move
here also perf_ns__name(), that was introduced in another later patch.
Also used PRIu64 and PRIx64 to fix the build in some enfironments wrt:
util/event.c:1129:39: error: format '%lx' expects argument of type 'long unsigned int', but argument 6 has type 'long long unsigned int' [-Werror=format=]
ret += fprintf(fp, "%u/%s: %lu/0x%lx%s", idx
^
Testing it:
# perf record --namespaces -a
^C[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.083 MB perf.data (423 samples) ]
#
# perf report -D
<SNIP>
3 2028902078892 0x115140 [0xa0]: PERF_RECORD_NAMESPACES 14783/14783 - nr_namespaces: 7
[0/net: 3/0xf0000081, 1/uts: 3/0xeffffffe, 2/ipc: 3/0xefffffff, 3/pid: 3/0xeffffffc,
4/user: 3/0xeffffffd, 5/mnt: 3/0xf0000000, 6/cgroup: 3/0xeffffffb]
0x1151e0 [0x30]: event: 9
.
. ... raw event: size 48 bytes
. 0000: 09 00 00 00 02 00 30 00 c4 71 82 68 0c 7f 00 00 ......0..q.h....
. 0010: a9 39 00 00 a9 39 00 00 94 28 fe 63 d8 01 00 00 .9...9...(.c....
. 0020: 03 00 00 00 00 00 00 00 ce c4 02 00 00 00 00 00 ................
<SNIP>
NAMESPACES events: 1
<SNIP>
#
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Aravinda Prasad <aravinda@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sargun Dhillon <sargun@sargun.me>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/148891930386.25309.18412039920746995488.stgit@hbathini.in.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Changbin Du
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d35fa1e75f |
perf report: Document +field style argument support for --field option
Commit
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Namhyung Kim
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dc23103278 |
perf ftrace: Add support for -a and -C option
The -a/--all-cpus and -C/--cpu option is for controlling tracing cpus. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170224011251.14946-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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a9af6be5bc |
perf ftrace: Add support for --pid option
The -p (--pid) option enables to trace existing process by its pid.
Committer notes:
Testing it:
Using the function_graph tracer on a process that is just waiting for user
input and thus will make 'perf ftrace' sit there waiting for that, then press
any key on that mutt session and see what happens:
# perf ftrace -t function_graph -p `pidof mutt` | head -40
2) 1.038 us | switch_mm_irqs_off();
------------------------------------------
2) <idle>-0 => mutt-3595
------------------------------------------
2) | finish_task_switch() {
2) | smp_irq_work_interrupt() {
2) | irq_enter() {
2) 0.180 us | rcu_irq_enter();
2) 1.248 us | }
2) | __wake_up() {
2) 0.126 us | _raw_spin_lock_irqsave();
2) | __wake_up_common() {
2) | pollwake() {
2) | default_wake_function() {
2) | try_to_wake_up() {
2) 0.662 us | _raw_spin_lock_irqsave();
2) | select_task_rq_fair() {
2) 1.719 us | effective_load.isra.41();
2) 1.343 us | effective_load.isra.41();
2) | select_idle_sibling() {
2) 0.331 us | idle_cpu();
2) 1.458 us | }
2) 8.350 us | }
2) 0.200 us | _raw_spin_lock();
2) | ttwu_do_activate() {
2) | activate_task() {
2) 0.136 us | update_rq_clock.part.77();
2) | enqueue_task_fair() {
2) | enqueue_entity() {
2) 0.146 us | update_curr();
2) 0.330 us | account_entity_enqueue();
2) 0.280 us | update_cfs_shares();
2) 0.321 us | place_entity();
2) 0.206 us | __enqueue_entity();
2) 6.926 us | }
2) | enqueue_entity() {
2) 0.105 us | update_curr();
2) 0.175 us | account_entity_enqueue();
2) 0.531 us | update_cfs_shares();
#
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20170224011251.14946-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Charles Baylis
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7768f8dada |
perf tools: Allow sorting by symbol size
Add new sort key 'symbol_size' to allow user to sort by symbol size, or (more usefully) display the symbol size using --fields=...,symbol_size. Committer note: Testing it together with the recently added -q, to remove the headers, and using the '+' sign with -s, to add the symbol_size sort order to the default, which is '-s/--sort comm,dso,symbol': # perf report -q -s +symbol_size | head -10 10.39% swapper [kernel.vmlinux] [k] intel_idle 270 3.45% swapper [kernel.vmlinux] [k] update_blocked_averages 1546 2.61% swapper [kernel.vmlinux] [k] update_load_avg 1292 2.36% swapper [kernel.vmlinux] [k] update_cfs_shares 240 1.83% swapper [kernel.vmlinux] [k] __hrtimer_run_queues 606 1.74% swapper [kernel.vmlinux] [k] update_cfs_rq_load_avg. 1187 1.66% swapper [kernel.vmlinux] [k] apic_timer_interrupt 152 1.60% CPU 0/KVM [kvm] [k] kvm_set_msr_common 3046 1.60% gnome-shell libglib-2.0.so.0 [.] g_slist_find 37 1.46% gnome-termina libglib-2.0.so.0 [.] g_hash_table_lookup 370 # Signed-off-by: Charles Baylis <charles.baylis@linaro.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1487943176-13840-1-git-send-email-charles.baylis@linaro.org [ Use symbol__size(), remove needless %lld + (long long) casting ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Linus Torvalds
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3f26b0c876 |
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar: "Misc fixes on the kernel and tooling side - nothing in particular stands out" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits) perf/core: Fix the perf_cpu_time_max_percent check perf/core: Fix perf_event_enable_on_exec() timekeeping (again) perf/core: Remove confusing comment and move put_ctx() perf record: Honor --quiet option properly perf annotate: Add -q/--quiet option perf diff: Add -q/--quiet option perf report: Add -q/--quiet option perf utils: Check verbose flag properly perf utils: Add perf_quiet_option() perf record: Add -a as default target perf stat: Add -a as default target perf tools: Fail on using multiple bits long terms without value perf tools: Move new_term arguments into struct parse_events_term template perf build: Add special fixdep cleaning rule perf tools: Replace _SC_NPROCESSORS_CONF with max_present_cpu in cpu_topology_map perf header: Make build_cpu_topology skip offline/absent CPUs perf cpumap: Add cpu__max_present_cpu() perf session: Fix DEBUG=1 build with clang tools lib traceevent: It's preempt not prempt perf python: Filter out -specs=/a/b/c from the python binding cc options ... |
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Masahiro Yamada
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9332ef9dbd |
scripts/spelling.txt: add "an user" pattern and fix typo instances
Fix typos and add the following to the scripts/spelling.txt: an user||a user an userspace||a userspace I also added "userspace" to the list since it is a common word in Linux. I found some instances for "an userfaultfd", but I did not add it to the list. I felt it is endless to find words that start with "user" such as "userland" etc., so must draw a line somewhere. Link: http://lkml.kernel.org/r/1481573103-11329-4-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Namhyung Kim
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eddaef8896 |
perf annotate: Add -q/--quiet option
The -q/--quiet option is to suppress any message. Sometimes users just want to see the numbers and it can be used for that case. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170217081742.17417-6-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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63b42fce86 |
perf diff: Add -q/--quiet option
The -q/--quiet option is to suppress any message. Sometimes users just
want to see the numbers and it can be used for that case.
Committer notes:
Before:
# perf diff | head -10
Failed to open /tmp/perf-6678.map, continuing without symbols
Failed to open /tmp/perf-6678.map, continuing without symbols
Failed to open /tmp/perf-2646.map, continuing without symbols
# Event 'cycles'
#
# Baseline Delta Abs Shared Object Symbol
# ........ ......... .......................... ............................................
#
5.36% -1.76% [kernel.vmlinux] [k] intel_idle
2.80% +1.48% firefox [.] 0x00000000000101fe
57.12% -1.25% libxul.so [.] 0x00000000009bea92
1.36% -1.11% [kernel.vmlinux] [k] __schedule
4.26% -1.00% perf-6678.map [.] 0x00007fac4b0e9320
After:
# perf diff -q | head -10
5.36% -1.76% [kernel.vmlinux] [k] intel_idle
2.80% +1.48% firefox [.] 0x00000000000101fe
57.12% -1.25% libxul.so [.] 0x00000000009bea92
1.36% -1.11% [kernel.vmlinux] [k] __schedule
4.26% -1.00% perf-6678.map [.] 0x00007fac4b0e9320
1.86% +0.95% [kernel.vmlinux] [k] update_blocked_averages
0.80% -0.70% [kernel.vmlinux] [k] native_sched_clock
0.74% -0.58% [kernel.vmlinux] [k] native_write_msr
0.76% -0.56% qemu-system-x86_64 [.] 0x00000000002395c0
+0.54% libpulsecommon-10.0.so [.] 0x000000000002d91b
#
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20170217081742.17417-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim
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27fafab59a |
perf report: Add -q/--quiet option
The -q/--quiet option is to suppress any message. Sometimes users just
want to see the numbers and it can be used for that case.
Before:
$ perf report | head -15
Failed to open /lib/modules/3.19.3-3-ARCH/kernel/fs/ext4/ext4.ko.gz, continuing without symbols
Failed to open /lib/modules/3.19.3-3-ARCH/kernel/fs/jbd2/jbd2.ko.gz, continuing without symbols
Failed to open /tmp/perf-14507.map, continuing without symbols
...
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 39K of event 'cycles'
# Event count (approx.): 30444796573
#
# Overhead Command Shared Object Symbol
# ........ ........... ................... .........................
#
9.28% swapper [kernel.vmlinux] [k] intel_idle
5.64% swapper [kernel.vmlinux] [k] native_write_msr_safe
1.93% swapper [kernel.vmlinux] [k] __switch_to
1.89% swapper [kernel.vmlinux] [k] menu_select
1.75% sched-pipe [kernel.vmlinux] [k] __switch_to
After:
$ perf report -q | head
9.28% swapper [kernel.vmlinux] [k] intel_idle
5.64% swapper [kernel.vmlinux] [k] native_write_msr_safe
1.93% swapper [kernel.vmlinux] [k] __switch_to
1.89% swapper [kernel.vmlinux] [k] menu_select
1.75% sched-pipe [kernel.vmlinux] [k] __switch_to
1.67% swapper [kernel.vmlinux] [k] cpu_startup_entry
1.48% sched-pipe [kernel.vmlinux] [k] enqueue_entity
1.46% swapper [kernel.vmlinux] [k] __schedule
1.36% swapper [kernel.vmlinux] [k] native_read_tsc
1.34% sched-pipe [kernel.vmlinux] [k] __schedule
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20170217081742.17417-4-namhyung@kernel.org
[ Removed builtin-report.c verbose > 0 hunk added to the previous patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa
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483635a9d0 |
perf record: Add -a as default target
Running 'perf record' with no target (-a, -p, -t, etc) will now collect system wide data. Commiter notes: Testing it: [root@jouet ~]# perf record ^C[ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.351 MB perf.data (366 samples) ] # is equivalent to: # perf record -a ^C[ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.411 MB perf.data (978 samples) ] # Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20170217170018.GA15389@krava Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Jiri Olsa
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0d79f8b931 |
perf stat: Add -a as default target
Boris asked for default -a option in case we monitor only uncore events.
While implementing that I thought it might be actually useful to make it
overall default.
Running 'perf stat' will now collect system wide data.
Committer note:
Testing it:
# perf stat
^C
Performance counter stats for 'system wide':
3571.559178 cpu-clock (msec) # 4.000 CPUs utilized
3,346 context-switches # 0.937 K/sec
277 cpu-migrations # 0.078 K/sec
57,271 page-faults # 0.016 M/sec
4,535,633,835 cycles # 1.270 GHz
6,389,736,516 instructions # 1.41 insn per cycle
1,541,293,875 branches # 431.547 M/sec
14,526,396 branch-misses # 0.94% of all branches
0.892950118 seconds time elapsed
#
Requested-and-Acked-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20170217170034.GB15389@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim
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be57b3fd21 |
perf diff: Change default setting to "delta-abs"
The "delta-abs" compute method will show most changed entries on top. So users can easily see how much effect between the data. Note that it also changes the default of -o option to 1 in order to apply the compute method. To see original-style (sorted by baseline) use -o 0 option. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170210161856.18422-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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4b35994abe |
perf diff: Add diff.compute config option
The diff.compute config variable is to set the default compute method of perf diff command (-c option). Possible values 'delta' (default), 'delta-abs', 'ratio' and 'wdiff'. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Taeung Song <treeze.taeung@gmail.com> Link: http://lkml.kernel.org/r/20170210073614.24584-4-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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d49dd15d69 |
perf diff: Add diff.order config option
In many cases, I need to look at differences between two data so I often used the -o option to sort the result base on the difference first. It'd be nice to have a config option to set it by default. The diff.order config option is to set the default value of -o/--order option. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Taeung Song <treeze.taeung@gmail.com> Link: http://lkml.kernel.org/r/20170210073614.24584-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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a1668c25a8 |
perf diff: Add 'delta-abs' compute method
The 'delta-abs' compute method is same as 'delta' but shows entries with
bigger absolute delta first instead of sorting numerically. This is
only useful together with -o option.
Below is default output (-c delta):
$ perf diff -o 1 -c delta | grep -v ^# | head
42.22% +4.97% [kernel.kallsyms] [k] cfb_imageblit
0.62% +1.23% [kernel.kallsyms] [k] mutex_lock
+1.15% [kernel.kallsyms] [k] copy_user_generic_string
2.40% +0.95% [kernel.kallsyms] [k] bit_putcs
0.31% +0.79% [kernel.kallsyms] [k] link_path_walk
+0.64% [kernel.kallsyms] [k] kmem_cache_alloc
0.00% +0.57% [kernel.kallsyms] [k] __rcu_read_unlock
+0.45% [kernel.kallsyms] [k] alloc_set_pte
0.16% +0.45% [kernel.kallsyms] [k] menu_select
+0.41% ld-2.24.so [.] do_lookup_x
Now with 'delta-abs' it shows entries have bigger delta value either
positive or negative.
$ perf diff -o 1 -c delta-abs | grep -v ^# | head
42.22% +4.97% [kernel.kallsyms] [k] cfb_imageblit
12.72% -3.01% [kernel.kallsyms] [k] intel_idle
9.72% -1.31% [unknown] [.] 0x0000000000411343
0.62% +1.23% [kernel.kallsyms] [k] mutex_lock
2.40% +0.95% [kernel.kallsyms] [k] bit_putcs
0.31% +0.79% [kernel.kallsyms] [k] link_path_walk
1.35% -0.71% [kernel.kallsyms] [k] smp_call_function_single
0.00% +0.57% [kernel.kallsyms] [k] __rcu_read_unlock
0.16% +0.45% [kernel.kallsyms] [k] menu_select
0.72% -0.44% [kernel.kallsyms] [k] lookup_fast
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20170210073614.24584-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim
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d01f4e8db2 |
perf ftrace: Introduce new 'ftrace' tool
The 'perf ftrace' command is a simple wrapper of kernel's ftrace
functionality. It only supports single thread tracing currently and
just reads trace_pipe in text and then write it to stdout.
Committer notes:
Testing it:
# perf ftrace -f function_graph usleep 123456
<SNIP>
2) | SyS_nanosleep() {
2) | _copy_from_user() {
<SNIP>
2) 0.900 us | }
2) 1.354 us | }
2) | hrtimer_nanosleep() {
2) 0.062 us | __hrtimer_init();
2) | do_nanosleep() {
2) | hrtimer_start_range_ns() {
<SNIP>
2) 5.025 us | }
2) | schedule() {
2) 0.125 us | rcu_note_context_switch();
2) 0.057 us | _raw_spin_lock();
2) | deactivate_task() {
2) 0.369 us | update_rq_clock.part.77();
2) | dequeue_task_fair() {
<SNIP>
2) + 22.453 us | }
2) + 23.736 us | }
2) | pick_next_task_fair() {
<SNIP>
2) + 47.167 us | }
2) | pick_next_task_idle() {
<SNIP>
2) 4.462 us | }
------------------------------------------
2) usleep-20387 => <idle>-0
------------------------------------------
2) 0.806 us | switch_mm_irqs_off();
------------------------------------------
2) <idle>-0 => usleep-20387
------------------------------------------
2) 0.151 us | finish_task_switch();
2) @ 123597.2 us | }
2) 0.037 us | _cond_resched();
2) | hrtimer_try_to_cancel() {
2) 0.064 us | hrtimer_active();
2) 0.353 us | }
2) @ 123605.3 us | }
2) @ 123606.2 us | }
2) @ 123608.3 us | } /* SyS_nanosleep */
2) | __do_page_fault() {
<SNIP>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jeremy Eder <jeder@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>,
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/n/tip-r1hgmsj4dxny8arn3o9mw512@git.kernel.org
[ Various foward port fixes, add man page ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa
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190bacca16 |
perf c2c report: Coalesce by default only by pid,iaddr
It seems to be the most used argument for -c option so far. In the beginning when you want to have the overall process report, so it makes sense to make it the default one. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Joe Mario <jmario@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1484904032-11040-5-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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414e050c68 |
perf sched timehist: Add --state option
The --state option is to show task state when switched out. The state
is printed as a single character like in the /proc but I added 'I' for
idle state rather than 'R'.
$ perf sched timehist --state | head
Samples do not have callchains.
time cpu task name wait time sch delay run time state
[tid/pid] (msec) (msec) (msec)
-------- --- ----------------------- -------- ------------------ -----
1.753791 [3] <idle> 0.000 0.000 0.000 I
1.753834 [1] perf[27469] 0.000 0.000 0.000 S
1.753904 [3] perf[27470] 0.000 0.006 0.112 S
1.753914 [1] <idle> 0.000 0.000 0.079 I
1.753915 [3] migration/3[23] 0.000 0.002 0.011 S
1.754287 [2] <idle> 0.000 0.000 0.000 I
1.754335 [2] transmission[1773/1739] 0.000 0.004 0.047 S
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170113104523.31212-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Michael Petlan
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5c64f99b1d |
perf script: Fix man page about --dump-raw-trace option
The "--dump-raw-script" is not a valid option, replace it with the valid
one, "--dump-raw-trace"
Signed-off-by: Michael Petlan <mpetlan@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes:
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Jiri Olsa
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bfacbe3bf2 |
perf record: Add switch-output time option argument
It's now possible to specify the threshold time for perf.data like: $ perf record --switch-output=30s ... Once it's reached, the current data are dumped in to the perf.data.<timestamp> file and session does on. $ perf record --switch-output=30s ... [ perf record: dump data: Woken up 44 times ] [ perf record: Dump perf.data.2017010213043746 ] ... The time is expected to be a number with appended unit character - s/m/h/d. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483955520-29063-7-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Jiri Olsa
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dc0c6127c2 |
perf record: Add switch-output size option argument
It's now possible to specify the threshold size for perf.data like: $ perf record --switch-output=2G ... Once it's reached, the current data are dumped in to the perf.data.<timestamp> file and session does on. $ perf record --switch-output=2G ... [ perf record: dump data: Woken up 7244 times ] [ perf record: Dump perf.data.2017010214093746 ] ... The size is expected to be a number with appended unit character - B/K/M/G. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483955520-29063-5-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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017037ff3d |
perf trace: Allow specifying list of syscalls and events in -e/--expr/--event
Makes it easier to specify both events and syscalls (to be formatter
strace-like), i.e. previously one would have to do:
# perf trace -e nanosleep --event sched:sched_switch usleep 1
Now it is possible to do:
# perf trace -e nanosleep,sched:sched_switch usleep 1
0.000 ( 0.021 ms): usleep/17962 nanosleep(rqtp: 0x7ffdedd61ec0) ...
0.021 ( ): sched:sched_switch:usleep:17962 [120] S ==> swapper/1:0 [120])
0.000 ( 0.066 ms): usleep/17962 ... [continued]: nanosleep()) = 0
#
The old style --expr and using both -e and --event continues to work.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ieg6bakub4657l9e6afn85r4@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo
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355637717d |
perf kallsyms: Introduce tool to look for extended symbol information on the running kernel
Its similar to doing grep on a /proc/kallsyms, but it also shows extra information like the path to the kernel module and the unrelocated addresses in it, to help in diagnosing problems. It is also helps demonstrate the use of the symbols routines so that tool writers can use them more effectively. Using it: $ perf kallsyms e1000_xmit_frame netif_rx usb_stor_set_xfer_buf e1000_xmit_frame: [e1000e] /lib/modules/4.9.0+/kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko 0xffffffffc046fc10-0xffffffffc0470bb0 (0x19c80-0x1ac20) netif_rx: [kernel] [kernel.kallsyms] 0xffffffff916f03a0-0xffffffff916f0410 (0xffffffff916f03a0-0xffffffff916f0410) usb_stor_set_xfer_buf: [usb_storage] /lib/modules/4.9.0+/kernel/drivers/usb/storage/usb-storage.ko 0xffffffffc057aea0-0xffffffffc057af19 (0xf10-0xf89) $ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-79bk9pakujn4l4vq0f90klv3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Jiri Olsa
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60437ac02f |
perf record: Fix --switch-output documentation and comment
There's no --signal-trigger option, also adding the code comment into record man page. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Wang Nan <wangnan0@huawei.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483431600-19887-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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07235f84ec |
perf sched timehist: Add -I/--idle-hist option
The --idle-hist option is to analyze system idle state so which process
makes cpu to go idle. If this option is specified, non-idle events will
be skipped and processes switching to/from idle will be shown.
This option is mostly useful when used with --summary(-only) option. In
the idle-time summary view, idle time is accounted to previous thread
which is run before idle task.
The example output looks like following:
Idle-time summary
comm parent sched-out idle-time min-idle avg-idle max-idle stddev migrations
(count) (msec) (msec) (msec) (msec) %
--------------------------------------------------------------------------------------------
rcu_preempt[7] 2 95 550.872 0.011 5.798 23.146 7.63 0
migration/1[16] 2 1 15.558 15.558 15.558 15.558 0.00 0
khugepaged[39] 2 1 3.062 3.062 3.062 3.062 0.00 0
kworker/0:1H[124] 2 2 4.728 0.611 2.364 4.116 74.12 0
systemd-journal[167] 1 1 4.510 4.510 4.510 4.510 0.00 0
kworker/u16:3[558] 2 13 74.737 0.080 5.749 12.960 21.96 0
irq/34-iwlwifi[628] 2 21 118.403 0.032 5.638 23.990 24.00 0
kworker/u17:0[673] 2 1 3.523 3.523 3.523 3.523 0.00 0
dbus-daemon[722] 1 1 6.743 6.743 6.743 6.743 0.00 0
ifplugd[741] 1 1 58.826 58.826 58.826 58.826 0.00 0
wpa_supplicant[1490] 1 1 13.302 13.302 13.302 13.302 0.00 0
wpa_actiond[1492] 1 2 4.064 0.168 2.032 3.896 91.72 0
dockerd[1500] 1 1 0.055 0.055 0.055 0.055 0.00 0
...
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20161208144755.16673-6-namhyung@kernel.org
Link: http://lkml.kernel.org/r/20161213080632.19099-2-namhyung@kernel.org
[ Merged fix sent by Namhyumg, as posted in the second Link: tag ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
Yannick Brosseau
|
108a7c103b |
perf tools: Explicitly document that --children is enabled by default
The fact that the --children option is enabled by default is buried deep at the end of the help page, in the overhead calculation section. This make it explicit right where the option is listed, following the same way other default options are described Signed-off-by: Yannick Brosseau <scientist@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-team@fb.com Link: http://lkml.kernel.org/r/20161202160732.29058-1-scientist@fb.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
|
|
David Ahern
|
46690a8051 |
perf report: Add option to specify time window of interest
Add option to allow user to control analysis window. e.g., collect data
for time window and analyze a segment of interest within that window.
Committer notes:
Testing it:
Using the perf.data file captured via 'perf kmem record':
# perf report --header-only
# ========
# captured on: Tue Nov 29 16:01:53 2016
# hostname : jouet
# os release : 4.8.8-300.fc25.x86_64
# perf version : 4.9.rc6.g5a6aca
# arch : x86_64
# nrcpus online : 4
# nrcpus avail : 4
# cpudesc : Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz
# cpuid : GenuineIntel,6,61,4
# total memory : 20254660 kB
# cmdline : /home/acme/bin/perf kmem record usleep 1
# event : name = kmem:kmalloc, , id = { 931980, 931981, 931982, 931983 }, type = 2, size = 112, config = 0x1b9, { sample_period, sample_freq } = 1, sample_typ
# event : name = kmem:kmalloc_node, , id = { 931984, 931985, 931986, 931987 }, type = 2, size = 112, config = 0x1b7, { sample_period, sample_freq } = 1, sampl
# event : name = kmem:kfree, , id = { 931988, 931989, 931990, 931991 }, type = 2, size = 112, config = 0x1b5, { sample_period, sample_freq } = 1, sample_type
# event : name = kmem:kmem_cache_alloc, , id = { 931992, 931993, 931994, 931995 }, type = 2, size = 112, config = 0x1b8, { sample_period, sample_freq } = 1, s
# event : name = kmem:kmem_cache_alloc_node, , id = { 931996, 931997, 931998, 931999 }, type = 2, size = 112, config = 0x1b6, { sample_period, sample_freq } =
# event : name = kmem:kmem_cache_free, , id = { 932000, 932001, 932002, 932003 }, type = 2, size = 112, config = 0x1b4, { sample_period, sample_freq } = 1, sa
# HEADER_CPU_TOPOLOGY info available, use -I to display
# HEADER_NUMA_TOPOLOGY info available, use -I to display
# pmu mappings: cpu = 4, intel_pt = 7, intel_bts = 6, uncore_arb = 13, cstate_pkg = 15, breakpoint = 5, uncore_cbox_1 = 12, power = 9, software = 1, uncore_im
# HEADER_CACHE info available, use -I to display
# missing features: HEADER_BRANCH_STACK HEADER_GROUP_DESC HEADER_AUXTRACE HEADER_STAT
# ========
#
# # Looking at just the histogram entries for the first event:
#
# perf report | head -33
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 40 of event 'kmem:kmalloc'
# Event count (approx.): 40
#
# Overhead Trace output
# ........ ...............................................................................................................
#
37.50% call_site=ffffffffb91ad3c7 ptr=0xffff88895fc05000 bytes_req=4096 bytes_alloc=4096 gfp_flags=GFP_KERNEL
10.00% call_site=ffffffffb9258416 ptr=0xffff888a1dc61f00 bytes_req=240 bytes_alloc=256 gfp_flags=GFP_KERNEL|__GFP_ZERO
7.50% call_site=ffffffffb9258416 ptr=0xffff888a2640ac00 bytes_req=240 bytes_alloc=256 gfp_flags=GFP_KERNEL|__GFP_ZERO
2.50% call_site=ffffffffb92759ba ptr=0xffff888a26776000 bytes_req=4096 bytes_alloc=4096 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb9276864 ptr=0xffff8886f6b82600 bytes_req=136 bytes_alloc=192 gfp_flags=GFP_KERNEL|__GFP_ZERO
2.50% call_site=ffffffffb9276903 ptr=0xffff888aefcf0460 bytes_req=32 bytes_alloc=32 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb92ad0ce ptr=0xffff888756c98a00 bytes_req=392 bytes_alloc=512 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb92ad0ce ptr=0xffff888756c9ba00 bytes_req=504 bytes_alloc=512 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb92ad301 ptr=0xffff888a31747600 bytes_req=128 bytes_alloc=128 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb92ad511 ptr=0xffff888a9d26a2a0 bytes_req=28 bytes_alloc=32 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb936a7fb ptr=0xffff88873e8c11a0 bytes_req=24 bytes_alloc=32 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb936a7fb ptr=0xffff88873e8c12c0 bytes_req=24 bytes_alloc=32 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb936a7fb ptr=0xffff88873e8c1540 bytes_req=24 bytes_alloc=32 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb936a7fb ptr=0xffff88873e8c15a0 bytes_req=24 bytes_alloc=32 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb936a7fb ptr=0xffff88873e8c15e0 bytes_req=24 bytes_alloc=32 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb936a7fb ptr=0xffff88873e8c16e0 bytes_req=24 bytes_alloc=32 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb936a7fb ptr=0xffff88873e8c1c20 bytes_req=24 bytes_alloc=32 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb936a7fb ptr=0xffff888a9d26a2a0 bytes_req=24 bytes_alloc=32 gfp_flags=GFP_KERNEL
2.50% call_site=ffffffffb9373e66 ptr=0xffff8889f1931240 bytes_req=64 bytes_alloc=64 gfp_flags=GFP_ATOMIC|__GFP_ZERO
2.50% call_site=ffffffffb9373e66 ptr=0xffff8889f1931980 bytes_req=64 bytes_alloc=64 gfp_flags=GFP_ATOMIC|__GFP_ZERO
2.50% call_site=ffffffffb9373e66 ptr=0xffff8889f1931a00 bytes_req=64 bytes_alloc=64 gfp_flags=GFP_ATOMIC|__GFP_ZERO
#
# # And then limiting using the example for 'perf kmem stat --time' used
# # in the previous changeset committer note we see that there were no
# # kmem:kmalloc in that last part of the file, but there were some
# # kmem:kmem_cache_alloc ones:
#
# perf report --time 20119.782088, --stdio
#
# Total Lost Samples: 0
#
# Samples: 0 of event 'kmem:kmalloc'
# Event count (approx.): 0
#
# Overhead Trace output
# ........ ............
#
# Samples: 0 of event 'kmem:kmalloc_node'
# Event count (approx.): 0
#
# Overhead Trace output
# ........ ............
#
# Samples: 0 of event 'kmem:kfree'
# Event count (approx.): 0
#
# Overhead Trace output
# ........ ............
#
# Samples: 8 of event 'kmem:kmem_cache_alloc'
# Event count (approx.): 8
#
# Overhead Trace output
# ........ ..................................................................................................................
#
75.00% call_site=ffffffffb9333b42 ptr=0xffff888bdf1a39c0 bytes_req=48 bytes_alloc=48 gfp_flags=GFP_NOFS|__GFP_ZERO
12.50% call_site=ffffffffb90ad33a ptr=0xffff8889f071f6e0 bytes_req=160 bytes_alloc=160 gfp_flags=GFP_ATOMIC|__GFP_NOTRACK
12.50% call_site=ffffffffb9287cc1 ptr=0xffff8889b12722d8 bytes_req=104 bytes_alloc=104 gfp_flags=GFP_NOFS|__GFP_ZERO
#
Signed-off-by: David Ahern <dsahern@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1480439746-42695-7-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
David Ahern
|
2a865bd8dd |
perf kmem: Add option to specify time window of interest
Add option to allow user to control analysis window. e.g., collect data
for time window and analyze a segment of interest within that window.
Committer notes:
Testing it:
# perf kmem record usleep 1
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 1.540 MB perf.data (2049 samples) ]
# perf evlist
kmem:kmalloc
kmem:kmalloc_node
kmem:kfree
kmem:kmem_cache_alloc
kmem:kmem_cache_alloc_node
kmem:kmem_cache_free
# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events
#
# # Use 'perf script' to get a first approach, select a chunk for then using
# # with 'perf kmem stat --time'
#
# perf script | tail -15
usleep 9889 [0] 20119.782088: kmem:kmem_cache_free: (selinux_file_free_security+0x27) call_site=ffffffffb936aa07 ptr=0xffff888a1df49fc0
perf 9888 [3] 20119.782088: kmem:kmem_cache_free: (jbd2_journal_stop+0x1a1) call_site=ffffffffb9334581 ptr=0xffff888bdf1a39c0
perf 9888 [3] 20119.782089: kmem:kmem_cache_alloc: (jbd2__journal_start+0x72) call_site=ffffffffb9333b42 ptr=0xffff888bdf1a39c0 bytes_req=48 bytes_alloc=48 gfp_flags=GFP_NOFS|__GFP_ZERO
perf 9888 [3] 20119.782090: kmem:kmem_cache_free: (jbd2_journal_stop+0x1a1) call_site=ffffffffb9334581 ptr=0xffff888bdf1a39c0
perf 9888 [3] 20119.782090: kmem:kmem_cache_alloc: (jbd2__journal_start+0x72) call_site=ffffffffb9333b42 ptr=0xffff888bdf1a39c0 bytes_req=48 bytes_alloc=48 gfp_flags=GFP_NOFS|__GFP_ZERO
usleep 9889 [0] 20119.782091: kmem:kmem_cache_alloc: (__sigqueue_alloc+0x4a) call_site=ffffffffb90ad33a ptr=0xffff8889f071f6e0 bytes_req=160 bytes_alloc=160 gfp_flags=GFP_ATOMIC|__GFP_NOTRACK
perf 9888 [3] 20119.782091: kmem:kmem_cache_free: (jbd2_journal_stop+0x1a1) call_site=ffffffffb9334581 ptr=0xffff888bdf1a39c0
perf 9888 [3] 20119.782093: kmem:kmem_cache_free: (__sigqueue_free.part.17+0x33) call_site=ffffffffb90ad3f3 ptr=0xffff8889f071f6e0
perf 9888 [3] 20119.782098: kmem:kmem_cache_alloc: (jbd2__journal_start+0x72) call_site=ffffffffb9333b42 ptr=0xffff888bdf1a39c0 bytes_req=48 bytes_alloc=48 gfp_flags=GFP_NOFS|__GFP_ZERO
perf 9888 [3] 20119.782098: kmem:kmem_cache_free: (jbd2_journal_stop+0x1a1) call_site=ffffffffb9334581 ptr=0xffff888bdf1a39c0
perf 9888 [3] 20119.782099: kmem:kmem_cache_alloc: (jbd2__journal_start+0x72) call_site=ffffffffb9333b42 ptr=0xffff888bdf1a39c0 bytes_req=48 bytes_alloc=48 gfp_flags=GFP_NOFS|__GFP_ZERO
perf 9888 [3] 20119.782100: kmem:kmem_cache_alloc: (alloc_buffer_head+0x21) call_site=ffffffffb9287cc1 ptr=0xffff8889b12722d8 bytes_req=104 bytes_alloc=104 gfp_flags=GFP_NOFS|__GFP_ZERO
perf 9888 [3] 20119.782101: kmem:kmem_cache_free: (jbd2_journal_stop+0x1a1) call_site=ffffffffb9334581 ptr=0xffff888bdf1a39c0
perf 9888 [3] 20119.782102: kmem:kmem_cache_alloc: (jbd2__journal_start+0x72) call_site=ffffffffb9333b42 ptr=0xffff888bdf1a39c0 bytes_req=48 bytes_alloc=48 gfp_flags=GFP_NOFS|__GFP_ZERO
perf 9888 [3] 20119.782103: kmem:kmem_cache_free: (jbd2_journal_stop+0x1a1) call_site=ffffffffb9334581 ptr=0xffff888bdf1a39c0
#
# # stats for the whole perf.data file, i.e. no interval specified
#
# perf kmem stat
SUMMARY (SLAB allocator)
========================
Total bytes requested: 172,628
Total bytes allocated: 173,088
Total bytes freed: 161,280
Net total bytes allocated: 11,808
Total bytes wasted on internal fragmentation: 460
Internal fragmentation: 0.265761%
Cross CPU allocations: 0/851
#
# # stats for an end open interval, after a certain time:
#
# perf kmem stat --time 20119.782088,
SUMMARY (SLAB allocator)
========================
Total bytes requested: 552
Total bytes allocated: 552
Total bytes freed: 448
Net total bytes allocated: 104
Total bytes wasted on internal fragmentation: 0
Internal fragmentation: 0.000000%
Cross CPU allocations: 0/8
#
Signed-off-by: David Ahern <dsahern@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1480439746-42695-6-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
David Ahern
|
853b740711 |
perf sched timehist: Add option to specify time window of interest
Add option to allow user to control analysis window. e.g., collect data
for time window and analyze a segment of interest within that window.
Committer notes:
Testing it:
# perf sched record -a usleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.593 MB perf.data (25 samples) ]
#
# perf sched timehist | head -18
Samples do not have callchains.
time cpu task name wait time sch delay run time
[tid/pid] (msec) (msec) (msec)
------------- ------ --------------- --------- --------- --------
19818.635579 [0002] <idle> 0.000 0.000 0.000
19818.635613 [0000] perf[9116] 0.000 0.000 0.000
19818.635676 [0000] <idle> 0.000 0.000 0.063
19818.635678 [0000] rcuos/2[29] 0.000 0.002 0.001
19818.635696 [0002] perf[9117] 0.000 0.004 0.116
19818.635702 [0000] <idle> 0.001 0.000 0.024
19818.635709 [0002] migration/2[25] 0.000 0.003 0.012
19818.636263 [0000] usleep[9117] 0.005 0.000 0.560
19818.636316 [0000] <idle> 0.560 0.000 0.053
19818.636358 [0002] <idle> 0.129 0.000 0.649
19818.636358 [0000] usleep[9117] 0.053 0.002 0.042
#
# perf sched timehist --time 19818.635696,
Samples do not have callchains.
time cpu task name wait time sch delay run time
[tid/pid] (msec) (msec) (msec)
------------- ------ --------------- -------- --------- ---------
19818.635696 [0002] perf[9117] 0.000 0.120 0.000
19818.635702 [0000] <idle> 0.019 0.000 0.006
19818.635709 [0002] migration/2[25] 0.000 0.003 0.012
19818.636263 [0000] usleep[9117] 0.005 0.000 0.560
19818.636316 [0000] <idle> 0.560 0.000 0.053
19818.636358 [0002] <idle> 0.129 0.000 0.649
19818.636358 [0000] usleep[9117] 0.053 0.002 0.042
#
# perf sched timehist --time 19818.635696,19818.635709
Samples do not have callchains.
time cpu task name wait time sch delay run time
[tid/pid] (msec) (msec) (msec)
------------- ------ --------------- --------- --------- ---------
19818.635696 [0002] perf[9117] 0.000 0.120 0.000
19818.635702 [0000] <idle> 0.019 0.000 0.006
19818.635709 [0002] migration/2[25] 0.000 0.003 0.012
19818.635709 [0000] usleep[9117] 0.005 0.000 0.006
#
Signed-off-by: David Ahern <dsahern@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1480439746-42695-5-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
David Ahern
|
a91f4c473f |
perf script: Add option to specify time window of interest
Add option to allow user to control analysis window. e.g., collect data
for some amount of time and analyze a segment of interest within that
window.
Committer notes:
Testing it:
# perf evlist -v
cycles:ppp: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CALLCHAIN|CPU|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1
#
# perf script --hide-call-graph | head -15
swapper 0 [0] 9693.370039: 1 cycles:ppp: ffffffffb90072ad x86_pmu_enable (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [0] 9693.370044: 1 cycles:ppp: ffffffffb900ca1b intel_pmu_handle_irq (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [0] 9693.370046: 7 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [0] 9693.370048: 126 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [0] 9693.370049: 2701 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [0] 9693.370051: 58823 cycles:ppp: ffffffffb90cd2e0 idle_cpu (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [1] 9693.370059: 1 cycles:ppp: ffffffffb91a713a ctx_resched (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [1] 9693.370062: 1 cycles:ppp: ffffffffb900ca1b intel_pmu_handle_irq (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [1] 9693.370064: 13 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [1] 9693.370065: 250 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [1] 9693.370067: 5269 cycles:ppp: ffffffffb902fe79 sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [1] 9693.370069: 114602 cycles:ppp: ffffffffb90c1c5a atomic_notifier_call_chain (.../4.8.8-300.fc25.x86_64/vmlinux)
perf 5124 [2] 9693.370076: 1 cycles:ppp: ffffffffb91a76c1 __perf_event_enable (.../4.8.8-300.fc25.x86_64/vmlinux)
perf 5124 [2] 9693.370091: 1 cycles:ppp: ffffffffb900ca1b intel_pmu_handle_irq (.../4.8.8-300.fc25.x86_64/vmlinux)
perf 5124 [2] 9693.370095: 3 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
#
# perf script --hide-call-graph --time ,9693.370048
swapper 0 [0] 9693.370039: 1 cycles:ppp: ffffffffb90072ad x86_pmu_enable (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [0] 9693.370044: 1 cycles:ppp: ffffffffb900ca1b intel_pmu_handle_irq (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [0] 9693.370046: 7 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
# perf script --hide-call-graph --time 9693.370064,9693.370076
swapper 0 [1] 9693.370064: 13 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [1] 9693.370065: 250 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [1] 9693.370067: 5269 cycles:ppp: ffffffffb902fe79 sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [1] 9693.370069: 114602 cycles:ppp: ffffffffb90c1c5a atomic_notifier_call_chain (.../4.8.8-300.fc25.x86_64/vmlinux)
#
Signed-off-by: David Ahern <dsahern@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1480439746-42695-4-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
David Ahern
|
64eff7d9c4 |
perf script: Add option to stop printing callchain
Allow user to specify list of symbols which cause the dump of callchains
to stop at that symbol.
Committer notes:
Testing it:
# perf record -ag usleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.177 MB perf.data (33 samples) ]
#
# # Without it:
#
# perf script
swapper 0 [000] 9693.370039: 1 cycles:ppp:
2072ad x86_pmu_enable (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a29d7 perf_pmu_enable.part.90 (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a713a ctx_resched (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a76c1 __perf_event_enable (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a0390 event_function (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a1cff remote_function (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
326978 flush_smp_call_function_queue (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
327413 generic_smp_call_function_single_interrupt (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
249b37 smp_call_function_single_interrupt (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
a04b2c call_function_single_interrupt (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
889427 cpuidle_enter (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
2e534a call_cpuidle (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
2e5730 cpu_startup_entry (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
9f5167 rest_init (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
137ffeb start_kernel ([kernel.vmlinux].init.text)
137f2ca x86_64_start_reservations ([kernel.vmlinux].init.text)
137f419 x86_64_start_kernel ([kernel.vmlinux].init.text)
swapper 0 [000] 9693.370044: 1 cycles:ppp:
20ca1b intel_pmu_handle_irq (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
205b0c perf_event_nmi_handler (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
22a14a nmi_handle (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
22a6b3 default_do_nmi (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
22a83c do_nmi (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
a03fb1 end_repeat_nmi (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a29d7 perf_pmu_enable.part.90 (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a713a ctx_resched (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a76c1 __perf_event_enable (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a0390 event_function (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a1cff remote_function (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
326978 flush_smp_call_function_queue (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
327413 generic_smp_call_function_single_interrupt (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
249b37 smp_call_function_single_interrupt (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
a04b2c call_function_single_interrupt (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
889427 cpuidle_enter (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
2e534a call_cpuidle (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
2e5730 cpu_startup_entry (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
9f5167 rest_init (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
137ffeb start_kernel ([kernel.vmlinux].init.text)
137f2ca x86_64_start_reservations ([kernel.vmlinux].init.text)
#
# # Using it to see just what are the calls from the 'remote_function' function:
#
# perf script --stop-bt remote_function
swapper 0 [000] 9693.370039: 1 cycles:ppp:
2072ad x86_pmu_enable (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a29d7 perf_pmu_enable.part.90 (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a713a ctx_resched (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a76c1 __perf_event_enable (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a0390 event_function (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a1cff remote_function (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
swapper 0 [000] 9693.370044: 1 cycles:ppp:
20ca1b intel_pmu_handle_irq (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
205b0c perf_event_nmi_handler (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
22a14a nmi_handle (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
22a6b3 default_do_nmi (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
22a83c do_nmi (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
a03fb1 end_repeat_nmi (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a29d7 perf_pmu_enable.part.90 (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a713a ctx_resched (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a76c1 __perf_event_enable (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a0390 event_function (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
3a1cff remote_function (/usr/lib/debug/lib/modules/4.8.8-300.fc25.x86_64/vmlinux)
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1480104021-36275-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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David Ahern
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350f54fab2 |
perf sched timehist: Handle cpu migration events
Add handlers for sched:sched_migrate_task event. Total number of migrations is added to summary display and -M/--migrations can be used to show migration events. Signed-off-by: David Ahern <dsahern@gmail.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1480091321-35591-1-git-send-email-dsa@cumulusnetworks.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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David Ahern
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a407b0678b |
perf sched timehist: Add -V/--cpu-visual option
The -V option provides a visual aid for sched switches by cpu:
$ perf sched timehist -V
time cpu 0123456789abc task name b/n time sch delay run time
[tid/pid] (msec) (msec) (msec)
--------------- ------ ------------- -------------------- --------- --------- ---------
...
2412598.429696 [0009] i <idle> 0.000 0.000 0.000
2412598.429767 [0002] s perf[7219] 0.000 0.000 0.000
2412598.429783 [0009] s perf[7220] 0.000 0.006 0.087
2412598.429794 [0010] i <idle> 0.000 0.000 0.000
2412598.429795 [0009] s migration/9[53] 0.000 0.003 0.011
2412598.430370 [0010] s sleep[7220] 0.011 0.000 0.576
2412598.432584 [0003] i <idle> 0.000 0.000 0.000
...
Committer notes:
'i' marks idle time, 's' are scheduler events.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20161116060634.28477-8-namhyung@kernel.org
[ Add documentation based on above commit message ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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David Ahern
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6c973c9085 |
perf sched timehist: Add call graph options
If callchains were recorded they are appended to the line with a default stack depth of 5: 1.874569 [0011] gcc[31949] 0.014 0.000 1.148 wait_for_completion_killable <- do_fork <- sys_vfork <- stub_vfork <- __vfork 1.874591 [0010] gcc[31951] 0.000 0.000 0.024 __cond_resched <- _cond_resched <- wait_for_completion <- stop_one_cpu <- sched_exec 1.874603 [0010] migration/10[59] 3.350 0.004 0.011 smpboot_thread_fn <- kthread <- ret_from_fork 1.874604 [0011] <idle> 1.148 0.000 0.035 cpu_startup_entry <- start_secondary 1.874723 [0005] <idle> 0.016 0.000 1.383 cpu_startup_entry <- start_secondary 1.874746 [0005] gcc[31949] 0.153 0.078 0.022 do_wait sys_wait4 <- system_call_fastpath <- __GI___waitpid --no-call-graph can be used to not show the callchains. --max-stack is used to control the number of frames shown (default of 5). -x/--excl options can be used to collapse redundant callchains to get more relevant data on screen. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/20161116060634.28477-7-namhyung@kernel.org [ Add documentation based on above commit message ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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David Ahern
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fc1469f1b2 |
perf sched timehist: Add -w/--wakeups option
The -w option is to show wakeup events with timehist.
$ perf sched timehist -w
time cpu task name b/n time sch delay run time
[tid/pid] (msec) (msec) (msec)
--------------- ------ -------------------- --------- --------- ---------
2412598.429689 [0002] perf[7219] awakened: perf[7220]
2412598.429696 [0009] <idle> 0.000 0.000 0.000
2412598.429767 [0002] perf[7219] 0.000 0.000 0.000
2412598.429780 [0009] perf[7220] awakened: migration/9[53]
...
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20161116060634.28477-6-namhyung@kernel.org
[ Add documentation based on above commit message ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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David Ahern
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49394a2a24 |
perf sched timehist: Introduce timehist command
'perf sched timehist' provides an analysis of scheduling events.
Example usage:
perf sched record -- sleep 1
perf sched timehist
By default it shows the individual schedule events, including the wait
time (time between sched-out and next sched-in events for the task), the
task scheduling delay (time between wakeup and actually running) and run
time for the task:
time cpu task name wait time sch delay run time
[tid/pid] (msec) (msec) (msec)
-------------- ------ -------------------- --------- --------- ---------
79371.874569 [0011] gcc[31949] 0.014 0.000 1.148
79371.874591 [0010] gcc[31951] 0.000 0.000 0.024
79371.874603 [0010] migration/10[59] 3.350 0.004 0.011
79371.874604 [0011] <idle> 1.148 0.000 0.035
79371.874723 [0005] <idle> 0.016 0.000 1.383
79371.874746 [0005] gcc[31949] 0.153 0.078 0.022
...
Times are in msec.usec.
Committer note:
Add above explanation as the 'perf sched timehist' entry for 'man
perf-sched'.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20161116060634.28477-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa
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d940baccc9 |
perf c2c report: Display total HITMs on default
Currently we display the cacheline list sorted on remote HITMs by default. The problem is that they might not be always counted and 'perf c2c report' displays an empty output. Thus it's more convenient to display and sort the cacheline list based on the total of HITMs and have the best change to see data in the default report run. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Joe Mario <jmario@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1479764011-10732-6-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Jiri Olsa
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b7ac4f9f3b |
perf c2c report: Add -f/--force option
Adding -f/--force option to go through ownership validation: $ sudo perf c2c report File perf.data not owned by current user or root (use -f to override) $ $ sudo perf c2c report -f < c2c report output > $ Signed-off-by: Jiri Olsa <jolsa@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Joe Mario <jmario@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1479764011-10732-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Taeung Song
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c6fc018a7a |
perf config: Add support setting variables in a config file
Add setting feature that can add config variables with their values to a
config file (i.e. user or system config file) or modify config key-value
pairs in a config file. For the syntax examples:
perf config [<file-option>] [section.name[=value] ...]
e.g. You can set the ui.show-headers to false with
# perf config ui.show-headers=false
If you want to add or modify several config items, you can do like
# perf config annotate.show_nr_jumps=false kmem.default=slab
Committer notes:
Testing it:
$ perf config -l
top.children=true
report.children=false
$
$ perf config top.children=false
$ perf config -l
top.children=false
report.children=false
$
$ perf config kmem.default=slab
$ perf config -l
top.children=false
report.children=false
kmem.default=slab
$
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Nambong Ha <over3025@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: Wookje Kwon <aweee0@gmail.com>
Link: http://lkml.kernel.org/r/1478241862-31230-5-git-send-email-treeze.taeung@gmail.com
[ Combined patch with docs update with this one ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Taeung Song
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909236083e |
perf config: Add support for getting config key-value pairs
Add a functionality getting specific config key-value pairs.
For the syntax examples,
perf config [<file-option>] [section.name ...]
e.g. To query config items 'report.queue-size' and 'report.children', do
# perf config report.queue-size report.children
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Nambong Ha <over3025@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: Wookje Kwon <aweee0@gmail.com>
Link: http://lkml.kernel.org/r/1478241862-31230-2-git-send-email-treeze.taeung@gmail.com
[ Combined patch with docs update with this one ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo
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699c12a7cc |
perf intel-pt: Update documentation about context switch events
Since the unprivileged sched switch event was added in perf, PT doesn't
need need perf_event_paranoid=-1 anymore for per cpu decoding.
Add a note stating that that is only needed for kernels < 4.2.
Reported-by: Andi Kleen <ak@linux.intel.com>
Report-Link: http://lkml.kernel.org/r/http://lkml.kernel.org/n/tip-x2ybghpqxxn3zu0m8o7qi42r@git.kernel.org
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes:
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