mirror of https://gitee.com/openkylin/linux.git
8131 Commits
| Author | SHA1 | Message | Date |
|---|---|---|---|
Linus Torvalds
|
31486372a1 |
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
"The main changes in this cycle were:
Kernel:
- kprobes updates: use better W^X patterns for code modifications,
improve optprobes, remove jprobes. (Masami Hiramatsu, Kees Cook)
- core fixes: event timekeeping (enabled/running times statistics)
fixes, perf_event_read() locking fixes and cleanups, etc. (Peter
Zijlstra)
- Extend x86 Intel free-running PEBS support and support x86
user-register sampling in perf record and perf script. (Andi Kleen)
Tooling:
- Completely rework the way inline frames are handled. Instead of
querying for the inline nodes on-demand in the individual tools, we
now create proper callchain nodes for inlined frames. (Milian
Wolff)
- 'perf trace' updates (Arnaldo Carvalho de Melo)
- Implement a way to print formatted output to per-event files in
'perf script' to facilitate generate flamegraphs, elliminating the
need to write scripts to do that separation (yuzhoujian, Arnaldo
Carvalho de Melo)
- Update vendor events JSON metrics for Intel's Broadwell, Broadwell
Server, Haswell, Haswell Server, IvyBridge, IvyTown, JakeTown,
Sandy Bridge, Skylake, SkyLake Server - and Goldmont Plus V1 (Andi
Kleen, Kan Liang)
- Multithread the synthesizing of PERF_RECORD_ events for
pre-existing threads in 'perf top', speeding up that phase, greatly
improving the user experience in systems such as Intel's Knights
Mill (Kan Liang)
- Introduce the concept of weak groups in 'perf stat': try to set up
a group, but if it's not schedulable fallback to not using a group.
That gives us the best of both worlds: groups if they work, but
still a usable fallback if they don't. E.g: (Andi Kleen)
- perf sched timehist enhancements (David Ahern)
- ... various other enhancements, updates, cleanups and fixes"
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (139 commits)
kprobes: Don't spam the build log with deprecation warnings
arm/kprobes: Remove jprobe test case
arm/kprobes: Fix kretprobe test to check correct counter
perf srcline: Show correct function name for srcline of callchains
perf srcline: Fix memory leak in addr2inlines()
perf trace beauty kcmp: Beautify arguments
perf trace beauty: Implement pid_fd beautifier
tools include uapi: Grab a copy of linux/kcmp.h
perf callchain: Fix double mapping al->addr for children without self period
perf stat: Make --per-thread update shadow stats to show metrics
perf stat: Move the shadow stats scale computation in perf_stat__update_shadow_stats
perf tools: Add perf_data_file__write function
perf tools: Add struct perf_data_file
perf tools: Rename struct perf_data_file to perf_data
perf script: Print information about per-event-dump files
perf trace beauty prctl: Generate 'option' string table from kernel headers
tools include uapi: Grab a copy of linux/prctl.h
perf script: Allow creating per-event dump files
perf evsel: Restore evsel->priv as a tool private area
perf script: Use event_format__fprintf()
...
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Linus Torvalds
|
8e9a2dba86 |
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core locking updates from Ingo Molnar:
"The main changes in this cycle are:
- Another attempt at enabling cross-release lockdep dependency
tracking (automatically part of CONFIG_PROVE_LOCKING=y), this time
with better performance and fewer false positives. (Byungchul Park)
- Introduce lockdep_assert_irqs_enabled()/disabled() and convert
open-coded equivalents to lockdep variants. (Frederic Weisbecker)
- Add down_read_killable() and use it in the VFS's iterate_dir()
method. (Kirill Tkhai)
- Convert remaining uses of ACCESS_ONCE() to
READ_ONCE()/WRITE_ONCE(). Most of the conversion was Coccinelle
driven. (Mark Rutland, Paul E. McKenney)
- Get rid of lockless_dereference(), by strengthening Alpha atomics,
strengthening READ_ONCE() with smp_read_barrier_depends() and thus
being able to convert users of lockless_dereference() to
READ_ONCE(). (Will Deacon)
- Various micro-optimizations:
- better PV qspinlocks (Waiman Long),
- better x86 barriers (Michael S. Tsirkin)
- better x86 refcounts (Kees Cook)
- ... plus other fixes and enhancements. (Borislav Petkov, Juergen
Gross, Miguel Bernal Marin)"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits)
locking/x86: Use LOCK ADD for smp_mb() instead of MFENCE
rcu: Use lockdep to assert IRQs are disabled/enabled
netpoll: Use lockdep to assert IRQs are disabled/enabled
timers/posix-cpu-timers: Use lockdep to assert IRQs are disabled/enabled
sched/clock, sched/cputime: Use lockdep to assert IRQs are disabled/enabled
irq_work: Use lockdep to assert IRQs are disabled/enabled
irq/timings: Use lockdep to assert IRQs are disabled/enabled
perf/core: Use lockdep to assert IRQs are disabled/enabled
x86: Use lockdep to assert IRQs are disabled/enabled
smp/core: Use lockdep to assert IRQs are disabled/enabled
timers/hrtimer: Use lockdep to assert IRQs are disabled/enabled
timers/nohz: Use lockdep to assert IRQs are disabled/enabled
workqueue: Use lockdep to assert IRQs are disabled/enabled
irq/softirqs: Use lockdep to assert IRQs are disabled/enabled
locking/lockdep: Add IRQs disabled/enabled assertion APIs: lockdep_assert_irqs_enabled()/disabled()
locking/pvqspinlock: Implement hybrid PV queued/unfair locks
locking/rwlocks: Fix comments
x86/paravirt: Set up the virt_spin_lock_key after static keys get initialized
block, locking/lockdep: Assign a lock_class per gendisk used for wait_for_completion()
workqueue: Remove now redundant lock acquisitions wrt. workqueue flushes
...
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Andrei Vagin
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33974a414c |
perf trace: Call machine__exit() at exit
Otherwise 'perf trace' leaves a temporary file /tmp/perf-vdso.so-XXXXXX. $ perf trace -o log true $ ls -l /tmp/perf-vdso.* -rw------- 1 root root 8192 Nov 8 03:08 /tmp/perf-vdso.so-5bCpD0 Signed-off-by: Andrei Vagin <avagin@openvz.org> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Vasily Averin <vvs@virtuozzo.com> Link: http://lkml.kernel.org/r/20171108002246.8924-1-avagin@openvz.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Jiri Olsa
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a271bfaf30 |
perf tools: Fix eBPF event specification parsing
Looks like I've reached the new level of stupidity, adding missing braces.
Committer testing:
Given the following eBPF C filter, that will add a record when it
returns true, i.e. when the tv_nsec variable is > 2000ns, should be
built and installed via sys_bpf(), but fails to do so before this patch:
# cat filter.c
#include <uapi/linux/bpf.h>
#define SEC(NAME) __attribute__((section(NAME), used))
SEC("func=hrtimer_nanosleep rqtp->tv_nsec")
int func(void *ctx, int err, long nsec)
{
return nsec > 1000;
}
char _license[] SEC("license") = "GPL";
int _version SEC("version") = LINUX_VERSION_CODE;
#
# perf trace -e nanosleep,filter.c usleep 1
invalid or unsupported event: 'filter.c'
Run 'perf list' for a list of valid events
Usage: perf trace [<options>] [<command>]
or: perf trace [<options>] -- <command> [<options>]
or: perf trace record [<options>] [<command>]
or: perf trace record [<options>] -- <command> [<options>]
-e, --event <event> event/syscall selector. use 'perf list' to list available events
#
And works again after it is applied, the nothing is inserted when the co
# perf trace -e *sleep,filter.c usleep 1
0.000 ( 0.066 ms): usleep/23994 nanosleep(rqtp: 0x7ffead94a0d0) = 0
# perf trace -e *sleep,filter.c usleep 2
0.000 ( 0.008 ms): usleep/24378 nanosleep(rqtp: 0x7fffa021ba50) ...
0.008 ( ): perf_bpf_probe:func:(ffffffffb410cb30) tv_nsec=2000)
0.000 ( 0.066 ms): usleep/24378 ... [continued]: nanosleep()) = 0
#
The intent of
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Jiri Olsa
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b6af53b7d6 |
perf tools: Add "reject" option for parse-events.l
Arnaldo reported broken builds in some distros using a newer flex release, 2.6.4, found in Alpine Linux 3.6 and Edge, with flex not spotting the REJECT macro: CC /tmp/build/perf/util/parse-events-flex.o util/parse-events.l: In function 'parse_events_lex': /tmp/build/perf/util/parse-events-flex.c:4734:16: error: \ 'reject_used_but_not_detected' undeclared (first use in this function) It's happening because we put the REJECT under another USER_REJECT macro in following commit: |
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Ingo Molnar
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8c5db92a70 |
Merge branch 'linus' into locking/core, to resolve conflicts
Conflicts: include/linux/compiler-clang.h include/linux/compiler-gcc.h include/linux/compiler-intel.h include/uapi/linux/stddef.h Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Ingo Molnar
|
15bcdc9477 |
Merge branch 'linus' into perf/core, to fix conflicts
Conflicts: tools/perf/arch/arm/annotate/instructions.c tools/perf/arch/arm64/annotate/instructions.c tools/perf/arch/powerpc/annotate/instructions.c tools/perf/arch/s390/annotate/instructions.c tools/perf/arch/x86/tests/intel-cqm.c tools/perf/ui/tui/progress.c tools/perf/util/zlib.c Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Ingo Molnar
|
294cbd05e3 |
Merge branch 'linus' into perf/urgent, to pick up dependent commits
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Greg Kroah-Hartman
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b24413180f |
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Namhyung Kim
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7285cf3325 |
perf srcline: Show correct function name for srcline of callchains
When libbfd is not used, it doesn't show proper function name and reuse
the original symbol of the sample. That's because it passes the
original sym to inline_list__append(). As `addr2line -f` returns
function names as well, use that to create an inline_sym and pass it to
inline_list__append().
For example, following data shows that inlined entries of main have same
name (main).
Before:
$ perf report -g srcline -q | head
45.22% inlining libm-2.26.so [.] __hypot_finite
|
---__hypot_finite ??:0
|
|--44.15%--hypot ??:0
| main complex:589
| main complex:597
| main complex:654
| main complex:664
| main inlining.cpp:14
After:
$ perf report -g srcline -q | head
45.22% inlining libm-2.26.so [.] __hypot_finite
|
---__hypot_finite
|
|--44.15%--hypot
| std::__complex_abs complex:589 (inlined)
| std::abs<double> complex:597 (inlined)
| std::_Norm_helper<true>::_S_do_it<double> complex:654 (inlined)
| std::norm<double> complex:664 (inlined)
| main inlining.cpp:14
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Reviewed-by: Milian Wolff <milian.wolff@kdab.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20171031020654.31163-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim
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b7b75a60b2 |
perf srcline: Fix memory leak in addr2inlines()
When libbfd is not used, addr2inlines() executes `addr2line -i` and process output line by line. But it resets filename to NULL in the loop so getline() allocates additional memory everytime instead of realloc. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20171031020654.31163-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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1de3038d00 |
perf trace beauty kcmp: Beautify arguments
For some unknown reason there is no entry in tracefs's syscalls for
kcmp, i.e. no tracefs/events/syscalls/sys_{enter,exit}_kcmp, so we need
to provide a data dictionary for the fields.
To beautify the 'type' argument we automatically generate a strarray
from tools/include/uapi/kcmp.h, the idx1 and idx2 args, nowadays used
only if type == KCMP_FILE, are masked for all the other types and a
lookup is made for the thread and fd to show the path, if possible,
getting it from the probe:vfs_getname if in place or from procfs, races
allowing.
A system wide strace like tracing session, with callchains shows just
one user so far in this fedora 25 machine:
# perf trace --max-stack 5 -e kcmp
<SNIP>
1502914.400 ( 0.001 ms): systemd/1 kcmp(pid1: 1 (systemd), pid2: 1 (systemd), type: FILE, idx1: 271<socket:[4723475]>, idx2: 25<socket:[4788686]>) = -1 ENOSYS Function not implemented
syscall (/usr/lib64/libc-2.25.so)
same_fd (/usr/lib/systemd/libsystemd-shared-233.so)
service_add_fd_store (/usr/lib/systemd/systemd)
service_notify_message.lto_priv.127 (/usr/lib/systemd/systemd)
1502914.407 ( 0.001 ms): systemd/1 kcmp(pid1: 1 (systemd), pid2: 1 (systemd), type: FILE, idx1: 270<socket:[4726396]>, idx2: 25<socket:[4788686]>) = -1 ENOSYS Function not implemented
syscall (/usr/lib64/libc-2.25.so)
same_fd (/usr/lib/systemd/libsystemd-shared-233.so)
service_add_fd_store (/usr/lib/systemd/systemd)
service_notify_message.lto_priv.127 (/usr/lib/systemd/systemd)
<SNIP>
The backtraces seem to agree this is really kcmp(), but this system
doesn't have the sys_kcmp(), bummer:
# uname -a
Linux jouet 4.14.0-rc3+ #1 SMP Fri Oct 13 12:21:12 -03 2017 x86_64 x86_64 x86_64 GNU/Linux
# grep kcmp /proc/kallsyms
ffffffffb60b8890 W sys_kcmp
$ grep CONFIG_CHECKPOINT_RESTORE ../build/v4.14.0-rc3+/.config
# CONFIG_CHECKPOINT_RESTORE is not set
$
So systemd uses it, good fedora kernel config has it:
$ grep CONFIG_CHECKPOINT_RESTORE /boot/config-4.13.4-200.fc26.x86_64
CONFIG_CHECKPOINT_RESTORE=y
[acme@jouet linux]$
/me goes to rebuild a kernel...
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-gz5fca968viw8m7hryjqvrln@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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0a2f7540ab |
perf trace beauty: Implement pid_fd beautifier
One that given a pid and a fd, will try to get the path for that fd. Will be used in the upcoming kcmp's KCMP_FILE beautifier. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andrey Vagin <avagin@openvz.org> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-7ketygp2dvs9h13wuakfncws@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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735e215e95 |
tools include uapi: Grab a copy of linux/kcmp.h
We will use it to generate tables for beautifying kcmp's 'type' arg. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andrey Vagin <avagin@openvz.org> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-r35zr79invmpinfe1zu57cas@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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d6332a176b |
perf callchain: Fix double mapping al->addr for children without self period
Milian Wolff found a problem he described in [1] and that for him would get fixed: "Note how most of the large offset values are now gone. Most notably, we get proper srcline resolution for the random.h and complex headers." Then Namhyung found the root cause: "I looked into it and found a bug handling cumulative (children) entries. For children entries that have no self period, the al->addr (so he->ip) ends up having an doubly-mapped address. It seems to be there from the beginning but only affects entries that have no srclines - finding srcline itself is done using a different address but it will show the invalid address if no srcline was found. I think we should fix the commit |
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Jiri Olsa
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021b462a51 |
perf stat: Make --per-thread update shadow stats to show metrics
We should support this because it would allow easily to collect metrics
for different threads in applications.
Original patch from posted by Jin Yao in here [1].
1. Current output, for example:
root@skl:/tmp# perf stat --per-thread -p 21623
^C
Performance counter stats for process id '21623':
vmstat-21623 0.517479 task-clock (msec) # 0.000 CPUs utilized
vmstat-21623 1 context-switches
vmstat-21623 0 cpu-migrations
vmstat-21623 0 page-faults
vmstat-21623 461,306 cycles
vmstat-21623 630,724 instructions
vmstat-21623 136,265 branches
vmstat-21623 2,520 branch-misses
1.444020756 seconds time elapsed
root@skl:/tmp# perf stat --per-thread --metrics ipc -p 21623
^C
Performance counter stats for process id '21623':
vmstat-21623 631,185 inst_retired.any
vmstat-21623 605,893 cpu_clk_unhalted.thread
1.415679293 seconds time elapsed
2. With this patch, the result would be:
root@skl:/tmp# perf stat --per-thread -p 21623
^C
Performance counter stats for process id '21623':
vmstat-21623 0.533759 task-clock (msec) # 0.000 CPUs utilized
vmstat-21623 1 context-switches # 0.002 M/sec
vmstat-21623 0 cpu-migrations # 0.000 K/sec
vmstat-21623 0 page-faults # 0.000 K/sec
vmstat-21623 473,896 cycles # 0.888 GHz
vmstat-21623 631,072 instructions # 1.33 insn per cycle
vmstat-21623 136,307 branches # 255.372 M/sec
vmstat-21623 2,524 branch-misses # 1.85% of all branches
1.544862861 seconds time elapsed
root@skl:/tmp# perf stat --per-thread --metrics ipc -p 21623
^C
Performance counter stats for process id '21623':
vmstat-21623 1,259,104 inst_retired.any # 1.2 IPC
vmstat-21623 1,056,756 cpu_clk_unhalted.thread
2.040954502 seconds time elapsed
[1] https://marc.info/?l=linux-kernel&m=150777054620511&w=2
Originally-from: Jin Yao <yao.jin@linux.intel.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Changbin Du <changbin.du@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-tr8ntktxmy4qc5769ajg5u6c@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
Jiri Olsa
|
54830dd0c3 |
perf stat: Move the shadow stats scale computation in perf_stat__update_shadow_stats
Move the shadow stats scale computation to the perf_stat__update_shadow_stats() function, so it's centralized and we don't forget to do it. It also saves few lines of code. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Changbin Du <changbin.du@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-htg7mmyxv6pcrf57qyo6msid@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Jiri Olsa
|
e268687bfb |
perf tools: Add perf_data_file__write function
Adding perf_data_file__write function to provide single file write operation. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Changbin Du <changbin.du@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-c3f9p4xzykr845ktqcek6p4t@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
|
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Jiri Olsa
|
eae8ad8042 |
perf tools: Add struct perf_data_file
Add struct perf_data_file to represent a single file within a perf_data struct. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Changbin Du <changbin.du@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-c3f9p4xzykr845ktqcek6p4t@git.kernel.org [ Fixup recent changes in 'perf script --per-event-dump' ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
|
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Jiri Olsa
|
8ceb41d7e3 |
perf tools: Rename struct perf_data_file to perf_data
Rename struct perf_data_file to perf_data, because we will add the possibility to have multiple files under perf.data, so the 'perf_data' name fits better. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Changbin Du <changbin.du@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-39wn4d77phel3dgkzo3lyan0@git.kernel.org [ Fixup recent changes in 'perf script --per-event-dump' ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
|
642ee1c6df |
perf script: Print information about per-event-dump files
For a file generated by "perf sched record sleep 50": # perf script --per-event-dump [ perf script: Wrote 23.121 MB perf.data.sched:sched_switch.dump (206015 samples) ] [ perf script: Wrote 0.000 MB perf.data.sched:sched_stat_wait.dump (0 samples) ] [ perf script: Wrote 0.000 MB perf.data.sched:sched_stat_sleep.dump (0 samples) ] [ perf script: Wrote 0.000 MB perf.data.sched:sched_stat_iowait.dump (0 samples) ] [ perf script: Wrote 17.680 MB perf.data.sched:sched_stat_runtime.dump (129342 samples) ] [ perf script: Wrote 0.000 MB perf.data.sched:sched_process_fork.dump (24 samples) ] [ perf script: Wrote 11.328 MB perf.data.sched:sched_wakeup.dump (106770 samples) ] [ perf script: Wrote 0.000 MB perf.data.sched:sched_wakeup_new.dump (24 samples) ] [ perf script: Wrote 2.477 MB perf.data.sched:sched_migrate_task.dump (20434 samples) ] # Similar to what is generated by 'perf record'. Based-on-a-patch-by: yuzhoujian <yuzhoujian@didichuxing.com> Suggested-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1508921599-10832-3-git-send-email-yuzhoujian@didichuxing.com Link: http://lkml.kernel.org/n/tip-xuketkkjuk2c0qz546ypd1u7@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
|
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Jiri Olsa
|
9445464bb8 |
perf tools: Unwind properly location after REJECT
We have defined YY_USER_ACTION to keep trace of the column location
during events parsing, but we need to clean it up when we call REJECT.
When REJECT is called, the lexer shrinks the text and re-runs the
matching, so we need to address it in resuming the previous location
value to keep it correct for error display, like:
Before:
$ perf stat -e 'cpu/uops_executed.core,krava/' true
event syntax error: '..38;5;9:mi=01;05;37;41:su=48;5;196;38;5;15:sg=48;5;1\
1;38;5;16:ca=48;5;196;38;5;226:tw=48;5;10;38;5;16:ow=48;5;10;38;5;21:st=48;5;\
21;38;50
�'
\___ unknown term
After:
$ ./perf stat -e 'cpu/uops_executed.core,krava/' true
event syntax error: '..cuted.core,krava/'
\___ unknown term
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Andi Kleen <ak@linux.intel.com>
Cc: Changbin Du <changbin.du@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-vug2hchlny30jfsfrumbym26@git.kernel.org
Link: http://lkml.kernel.org/r/20171009140944.GD28623@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo
|
d688d0376c |
perf trace beauty prctl: Generate 'option' string table from kernel headers
This is one more case where the way that syscall parameter values are defined in kernel headers are easy to parse using a shell script that will then generate the string table that gets used by the prctl 'option' argument beautifier. This way as soon as the header syncronization mechanism in perf's build system detects a change in a copy of a kernel ABI header and that file is syncronized, we get 'perf trace' updated automagically. Further work needed for the PR_SET_ values, as well for using eBPF to copy the non-integer arguments to/from the kernel. E.g.: System wide prctl tracing: # perf trace -e prctl 1668.028 ( 0.025 ms): TaskSchedulerR/10649 prctl(option: SET_NAME, arg2: 0x2b61d5db15d0) = 0 3365.663 ( 0.018 ms): chrome/10650 prctl(option: SET_SECCOMP, arg2: 2, arg4: 8 ) = -1 EFAULT Bad address 3366.585 ( 0.010 ms): chrome/10650 prctl(option: SET_NO_NEW_PRIVS, arg2: 1 ) = 0 3367.173 ( 0.009 ms): TaskSchedulerR/10652 prctl(option: SET_NAME, arg2: 0x2b61d2aaa300) = 0 3367.222 ( 0.003 ms): TaskSchedulerR/10653 prctl(option: SET_NAME, arg2: 0x2b61d2aaa1e0) = 0 3367.244 ( 0.002 ms): TaskSchedulerR/10654 prctl(option: SET_NAME, arg2: 0x2b61d2aaa0c0) = 0 3367.265 ( 0.002 ms): TaskSchedulerR/10655 prctl(option: SET_NAME, arg2: 0x2b61d2ac7f90) = 0 3367.281 ( 0.002 ms): Chrome_ChildIO/10656 prctl(option: SET_NAME, arg2: 0x7efbe406bb11) = 0 3367.220 ( 0.004 ms): TaskSchedulerS/10651 prctl(option: SET_NAME, arg2: 0x2b61d2ac1be0) = 0 3370.906 ( 0.010 ms): GpuMemoryThrea/10657 prctl(option: SET_NAME, arg2: 0x7efbe386ab11) = 0 3370.983 ( 0.003 ms): File/10658 prctl(option: SET_NAME, arg2: 0x7efbe3069b11 ) = 0 3384.272 ( 0.020 ms): Compositor/10659 prctl(option: SET_NAME, arg2: 0x7efbe2868b11 ) = 0 3612.091 ( 0.012 ms): DOM Worker/11489 prctl(option: SET_NAME, arg2: 0x7f49ab97ebf2 ) = 0 <SNIP> 4512.437 ( 0.004 ms): (sa1)/11490 prctl(option: SET_NAME, arg2: 0x7ffca15af844 ) = 0 4512.468 ( 0.002 ms): (sa1)/11490 prctl(option: SET_MM, arg2: ARG_START, arg3: 0x7f5cb7c81000) = 0 4512.472 ( 0.001 ms): (sa1)/11490 prctl(option: SET_MM, arg2: ARG_END, arg3: 0x7f5cb7c81006) = 0 4514.667 ( 0.002 ms): (sa1)/11490 prctl(option: GET_SECUREBITS ) = 0 Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-q0s2uw579o5ei6xlh2zjirgz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
|
4337279489 |
tools include uapi: Grab a copy of linux/prctl.h
We will use it to generate tables for beautifying prctl's 'option' arg and some of the others eventually. Cc: Andy Lutomirski <luto@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-cg8mpmz4hk9nfih685emnbk9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
|
a14390fde6 |
perf script: Allow creating per-event dump files
Introduce a new option to dump trace output to files named by the
monitored events and update perf-script documentation accordingly.
Shown below is output of perf script command with the newly introduced
option.
$ perf record -e cycles -e cs -ag -- sleep 1
$ perf script --per-event-dump
$ ls
perf.data.cycles.dump perf.data.cs.dump
Without per-event-dump support, drawing flamegraphs for different events
would require post processing to separate events. You can monitor only
one event at a time if you want to get flamegraphs for different events.
Using this option, you can get the trace output files named by the
monitored events, and could draw flamegraphs according to the event's
name.
Based-on-a-patch-by: yuzhoujian <yuzhoujian@didichuxing.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1508921599-10832-3-git-send-email-yuzhoujian@didichuxing.com
Link: http://lkml.kernel.org/n/tip-8ngzsjdhgiovkupl3r5yy570@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo
|
e669e833da |
perf evsel: Restore evsel->priv as a tool private area
When we started using it for stats and did it not just in
builtin-stat.c, but also for builtin-script.c, then it stopped being a
tool private area, so introduce a new pointer for these stats and leave
->priv to its original purpose.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: yuzhoujian <yuzhoujian@didichuxing.com>
Fixes:
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Arnaldo Carvalho de Melo
|
894f3f1732 |
perf script: Use event_format__fprintf()
Another case where we
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Arnaldo Carvalho de Melo
|
5ce2c5b4e4 |
perf script: Use pr_debug where appropriate
We have facilities for reporting unexpected, unlikely errors, use them. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Cc: yuzhoujian <yuzhoujian@didichuxing.com> Link: http://lkml.kernel.org/n/tip-c7j22xfjf1j773g7ufp607q0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
|
69c7125229 |
perf script: Add a few missing conversions to fprintf style
In
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|
Ravi Bangoria
|
331c7cb307 |
perf symbols: Fix memory corruption because of zero length symbols
Perf top is often crashing at very random locations on powerpc. After
investigating, I found the crash only happens when sample is of zero
length symbol. Powerpc kernel has many such symbols which does not
contain length details in vmlinux binary and thus start and end
addresses of such symbols are same.
Structure
struct sym_hist {
u64 nr_samples;
u64 period;
struct sym_hist_entry addr[0];
};
has last member 'addr[]' of size zero. 'addr[]' is an array of addresses
that belongs to one symbol (function). If function consist of 100
instructions, 'addr' points to an array of 100 'struct sym_hist_entry'
elements. For zero length symbol, it points to the *empty* array, i.e.
no members in the array and thus offset 0 is also invalid for such
array.
static int __symbol__inc_addr_samples(...)
{
...
offset = addr - sym->start;
h = annotation__histogram(notes, evidx);
h->nr_samples++;
h->addr[offset].nr_samples++;
h->period += sample->period;
h->addr[offset].period += sample->period;
...
}
Here, when 'addr' is same as 'sym->start', 'offset' becomes 0, which is
valid for normal symbols but *invalid* for zero length symbols and thus
updating h->addr[offset] causes memory corruption.
Fix this by adding one dummy element for zero length symbols.
Link: https://lkml.org/lkml/2016/10/10/148
Fixes:
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|
|
Milian Wolff
|
d8a88dd243 |
perf util: Enable handling of inlined frames by default
Now that we have caches in place to speed up the process of finding inlined frames and srcline information repeatedly, we can enable this useful option by default. Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jin Yao <yao.jin@linux.intel.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/20171019113836.5548-6-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
|
|
Milian Wolff
|
1fb7d06a50 |
perf report: Use srcline from callchain for hist entries
This also removes the symbol name from the srcline column, more on this
below.
This ensures we use the correct srcline, which could originate from a
potentially inlined function. The hist entries used to query for the
srcline based purely on the IP, which leads to wrong results for inlined
entries.
Before:
~~~~~
perf report --inline -s srcline -g none --stdio
...
# Children Self Source:Line
# ........ ........ ..................................................................................................................................
#
94.23% 0.00% __libc_start_main+18446603487898210537
94.23% 0.00% _start+41
44.58% 0.00% main+100
44.58% 0.00% std::_Norm_helper<true>::_S_do_it<double>+100
44.58% 0.00% std::__complex_abs+100
44.58% 0.00% std::abs<double>+100
44.58% 0.00% std::norm<double>+100
36.01% 0.00% hypot+18446603487892193300
25.81% 0.00% main+41
25.81% 0.00% std::__detail::_Adaptor<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>, double>::operator()+41
25.81% 0.00% std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> >+41
25.75% 25.75% random.h:143
18.39% 0.00% main+57
18.39% 0.00% std::__detail::_Adaptor<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>, double>::operator()+57
18.39% 0.00% std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> >+57
13.80% 13.80% random.tcc:3330
5.64% 0.00% ??:0
4.13% 4.13% __hypot_finite+163
4.13% 0.00% __hypot_finite+18446603487892193443
...
~~~~~
After:
~~~~~
perf report --inline -s srcline -g none --stdio
...
# Children Self Source:Line
# ........ ........ ...........................................
#
94.30% 1.19% main.cpp:39
94.23% 0.00% __libc_start_main+18446603487898210537
94.23% 0.00% _start+41
48.44% 1.70% random.h:1823
48.44% 0.00% random.h:1814
46.74% 2.53% random.h:185
44.68% 0.10% complex:589
44.68% 0.00% complex:597
44.68% 0.00% complex:654
44.68% 0.00% complex:664
40.61% 13.80% random.tcc:3330
36.01% 0.00% hypot+18446603487892193300
26.81% 0.00% random.h:151
26.81% 0.00% random.h:332
25.75% 25.75% random.h:143
5.64% 0.00% ??:0
4.13% 4.13% __hypot_finite+163
4.13% 0.00% __hypot_finite+18446603487892193443
...
~~~~~
Note that this change removes the symbol from the source:line hist
column. If this information is desired, users should explicitly query
for it if needed. I.e. run this command instead:
~~~~~
perf report --inline -s sym,srcline -g none --stdio
...
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 1K of event 'cycles:uppp'
# Event count (approx.): 1381229476
#
# Children Self Symbol Source:Line
# ........ ........ ................................................................................................................................... ...........................................
#
94.30% 1.19% [.] main main.cpp:39
94.23% 0.00% [.] __libc_start_main __libc_start_main+18446603487898210537
94.23% 0.00% [.] _start _start+41
48.44% 0.00% [.] std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > (inlined) random.h:1814
48.44% 0.00% [.] std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > (inlined) random.h:1823
46.74% 0.00% [.] std::__detail::_Adaptor<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>, double>::operator() (inlined) random.h:185
44.68% 0.00% [.] std::_Norm_helper<true>::_S_do_it<double> (inlined) complex:654
44.68% 0.00% [.] std::__complex_abs (inlined) complex:589
44.68% 0.00% [.] std::abs<double> (inlined) complex:597
44.68% 0.00% [.] std::norm<double> (inlined) complex:664
39.80% 13.59% [.] std::generate_canonical<double, 53ul, std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > random.tcc:3330
36.01% 0.00% [.] hypot hypot+18446603487892193300
26.81% 0.00% [.] std::__detail::__mod<unsigned long, 2147483647ul, 16807ul, 0ul> (inlined) random.h:151
26.81% 0.00% [.] std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>::operator() (inlined) random.h:332
25.75% 0.00% [.] std::__detail::_Mod<unsigned long, 2147483647ul, 16807ul, 0ul, true, true>::__calc (inlined) random.h:143
25.19% 25.19% [.] std::generate_canonical<double, 53ul, std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > random.h:143
4.13% 4.13% [.] __hypot_finite __hypot_finite+163
4.13% 0.00% [.] __hypot_finite __hypot_finite+18446603487892193443
...
~~~~~
Compared to the old behavior, this reduces duplication in the output.
Before we used to print the symbol name in the srcline column even
when the sym column was explicitly requested. I.e. the output was:
~~~~~
perf report --inline -s sym,srcline -g none --stdio
...
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 1K of event 'cycles:uppp'
# Event count (approx.): 1381229476
#
# Children Self Symbol Source:Line
# ........ ........ ................................................................................................................................... ..................................................................................................................................
#
94.23% 0.00% [.] __libc_start_main __libc_start_main+18446603487898210537
94.23% 0.00% [.] _start _start+41
44.58% 0.00% [.] main main+100
44.58% 0.00% [.] std::_Norm_helper<true>::_S_do_it<double> (inlined) std::_Norm_helper<true>::_S_do_it<double>+100
44.58% 0.00% [.] std::__complex_abs (inlined) std::__complex_abs+100
44.58% 0.00% [.] std::abs<double> (inlined) std::abs<double>+100
44.58% 0.00% [.] std::norm<double> (inlined) std::norm<double>+100
36.01% 0.00% [.] hypot hypot+18446603487892193300
25.81% 0.00% [.] main main+41
25.81% 0.00% [.] std::__detail::_Adaptor<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>, double>::operator() (inlined) std::__detail::_Adaptor<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>, double>::operator()+41
25.81% 0.00% [.] std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > (inlined) std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> >+41
25.69% 25.69% [.] std::generate_canonical<double, 53ul, std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > random.h:143
18.39% 0.00% [.] main main+57
18.39% 0.00% [.] std::__detail::_Adaptor<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>, double>::operator() (inlined) std::__detail::_Adaptor<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>, double>::operator()+57
18.39% 0.00% [.] std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > (inlined) std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> >+57
13.80% 13.80% [.] std::generate_canonical<double, 53ul, std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > random.tcc:3330
4.13% 4.13% [.] __hypot_finite __hypot_finite+163
4.13% 0.00% [.] __hypot_finite __hypot_finite+18446603487892193443
...
~~~~~
Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.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/20171019113836.5548-5-milian.wolff@kdab.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
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Milian Wolff
|
21ac9d547f |
perf report: Cache srclines for callchain nodes
On one hand this ensures that the memory is properly freed when the DSO
gets freed. On the other hand this significantly speeds up the
processing of the callchain nodes when lots of srclines are requested.
For one of my data files e.g.:
Before:
Performance counter stats for 'perf report -s srcline -g srcline --stdio':
52496.495043 task-clock (msec) # 0.999 CPUs utilized
634 context-switches # 0.012 K/sec
2 cpu-migrations # 0.000 K/sec
191,561 page-faults # 0.004 M/sec
165,074,498,235 cycles # 3.144 GHz
334,170,832,408 instructions # 2.02 insn per cycle
90,220,029,745 branches # 1718.591 M/sec
654,525,177 branch-misses # 0.73% of all branches
52.533273822 seconds time elapsedProcessed 236605 events and lost 40 chunks!
After:
Performance counter stats for 'perf report -s srcline -g srcline --stdio':
22606.323706 task-clock (msec) # 1.000 CPUs utilized
31 context-switches # 0.001 K/sec
0 cpu-migrations # 0.000 K/sec
185,471 page-faults # 0.008 M/sec
71,188,113,681 cycles # 3.149 GHz
133,204,943,083 instructions # 1.87 insn per cycle
34,886,384,979 branches # 1543.214 M/sec
278,214,495 branch-misses # 0.80% of all branches
22.609857253 seconds time elapsed
Note that the difference is only this large when `--inline` is not
passed. In such situations, we would use the inliner cache and thus do
not run this code path that often.
I think that this cache should actually be used in other places, too.
When looking at the valgrind leak report for perf report, we see tons of
srclines being leaked, most notably from calls to
hist_entry__get_srcline. The problem is that get_srcline has many
different formatting options (show_sym, show_addr, potentially even
unwind_inlines when calling __get_srcline directly). As such, the
srcline cannot easily be cached for all calls, or we'd have to add
caches for all formatting combinations (6 so far). An alternative would
be to remove the formatting options and handle that on a different level
- i.e. print the sym/addr on demand wherever we actually output
something. And the unwind_inlines could be moved into a separate
function that does not return the srcline.
Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.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/20171019113836.5548-4-milian.wolff@kdab.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
Milian Wolff
|
b38775cf76 |
perf report: Cache failed lookups of inlined frames
When no inlined frames could be found for a given address, we did not
store this information anywhere. That means we potentially do the costly
inliner lookup repeatedly for cases where we know it can never succeed.
This patch makes dso__parse_addr_inlines always return a valid
inline_node. It will be empty when no inliners are found. This enables
us to cache the empty list in the DSO, thereby improving the performance
when many addresses fail to find the inliners.
For my trivial example, the performance impact is already quite
significant:
Before:
~~~~~
Performance counter stats for 'perf report --stdio --inline -g srcline -s srcline' (5 runs):
594.804032 task-clock (msec) # 0.998 CPUs utilized ( +- 0.07% )
53 context-switches # 0.089 K/sec ( +- 4.09% )
0 cpu-migrations # 0.000 K/sec ( +-100.00% )
5,687 page-faults # 0.010 M/sec ( +- 0.02% )
2,300,918,213 cycles # 3.868 GHz ( +- 0.09% )
4,395,839,080 instructions # 1.91 insn per cycle ( +- 0.00% )
939,177,205 branches # 1578.969 M/sec ( +- 0.00% )
11,824,633 branch-misses # 1.26% of all branches ( +- 0.10% )
0.596246531 seconds time elapsed ( +- 0.07% )
~~~~~
After:
~~~~~
Performance counter stats for 'perf report --stdio --inline -g srcline -s srcline' (5 runs):
113.111405 task-clock (msec) # 0.990 CPUs utilized ( +- 0.89% )
29 context-switches # 0.255 K/sec ( +- 54.25% )
0 cpu-migrations # 0.000 K/sec
5,380 page-faults # 0.048 M/sec ( +- 0.01% )
432,378,779 cycles # 3.823 GHz ( +- 0.75% )
670,057,633 instructions # 1.55 insn per cycle ( +- 0.01% )
141,001,247 branches # 1246.570 M/sec ( +- 0.01% )
2,346,845 branch-misses # 1.66% of all branches ( +- 0.19% )
0.114222393 seconds time elapsed ( +- 1.19% )
~~~~~
Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.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/20171019113836.5548-3-milian.wolff@kdab.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
Milian Wolff
|
bf36eb5c4b |
perf report: Properly handle branch count in match_chain()
Some of the code paths I introduced before returned too early without running the code to handle a node's branch count. By refactoring match_chain to only have one exit point, this can be remedied. Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1707691.qaJ269GSZW@agathebauer Link: http://lkml.kernel.org/r/20171018185350.14893-2-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
|
|
Mark Rutland
|
6aa7de0591 |
locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()
Please do not apply this to mainline directly, instead please re-run the
coccinelle script shown below and apply its output.
For several reasons, it is desirable to use {READ,WRITE}_ONCE() in
preference to ACCESS_ONCE(), and new code is expected to use one of the
former. So far, there's been no reason to change most existing uses of
ACCESS_ONCE(), as these aren't harmful, and changing them results in
churn.
However, for some features, the read/write distinction is critical to
correct operation. To distinguish these cases, separate read/write
accessors must be used. This patch migrates (most) remaining
ACCESS_ONCE() instances to {READ,WRITE}_ONCE(), using the following
coccinelle script:
----
// Convert trivial ACCESS_ONCE() uses to equivalent READ_ONCE() and
// WRITE_ONCE()
// $ make coccicheck COCCI=/home/mark/once.cocci SPFLAGS="--include-headers" MODE=patch
virtual patch
@ depends on patch @
expression E1, E2;
@@
- ACCESS_ONCE(E1) = E2
+ WRITE_ONCE(E1, E2)
@ depends on patch @
expression E;
@@
- ACCESS_ONCE(E)
+ READ_ONCE(E)
----
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: davem@davemloft.net
Cc: linux-arch@vger.kernel.org
Cc: mpe@ellerman.id.au
Cc: shuah@kernel.org
Cc: snitzer@redhat.com
Cc: thor.thayer@linux.intel.com
Cc: tj@kernel.org
Cc: viro@zeniv.linux.org.uk
Cc: will.deacon@arm.com
Link: http://lkml.kernel.org/r/1508792849-3115-19-git-send-email-paulmck@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
|
Milian Wolff
|
aa441895f7 |
perf report: Compare symbol name for inlined frames when sorting
Similar to the callstack frame matching, we also have to compare the
symbol name when sorting hist entries. The reason is twofold: On one
hand, multiple inlined functions will use the same symbol start/end
values of the parent, non-inlined symbol.
As such, all of these symbols often end up missing from top-level
report, as they get merged with the non-inlined frame. On the other
hand, multiple different functions may end up inlining the same
function, and we need to aggregate these values properly.
Before:
~~~~~
perf report --stdio --inline -g none
# Children Self Command Shared Object Symbol
# ........ ........ ............ ............. ...................................
#
100.00% 39.69% cpp-inlining cpp-inlining [.] main
100.00% 0.00% cpp-inlining cpp-inlining [.] _start
100.00% 0.00% cpp-inlining libc-2.25.so [.] __libc_start_main
97.03% 0.00% cpp-inlining cpp-inlining [.] std::norm<double> (inlined)
59.53% 4.26% cpp-inlining libm-2.25.so [.] hypot
55.21% 55.08% cpp-inlining libm-2.25.so [.] __hypot_finite
0.52% 0.52% cpp-inlining libm-2.25.so [.] cabs
~~~~~
After:
~~~~~
perf report --stdio --inline -g none
# Children Self Command Shared Object Symbol
# ........ ........ ............ ............. ...................................................................................................................................
#
100.00% 39.69% cpp-inlining cpp-inlining [.] main
100.00% 0.00% cpp-inlining cpp-inlining [.] _start
100.00% 0.00% cpp-inlining libc-2.25.so [.] __libc_start_main
62.57% 0.00% cpp-inlining cpp-inlining [.] std::_Norm_helper<true>::_S_do_it<double> (inlined)
62.57% 0.00% cpp-inlining cpp-inlining [.] std::__complex_abs (inlined)
62.57% 0.00% cpp-inlining cpp-inlining [.] std::abs<double> (inlined)
62.57% 0.00% cpp-inlining cpp-inlining [.] std::norm<double> (inlined)
59.53% 4.26% cpp-inlining libm-2.25.so [.] hypot
55.21% 55.08% cpp-inlining libm-2.25.so [.] __hypot_finite
34.46% 0.00% cpp-inlining cpp-inlining [.] std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > (inlined)
32.39% 0.00% cpp-inlining cpp-inlining [.] std::__detail::_Adaptor<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>, double>::operator() (inlined)
32.39% 0.00% cpp-inlining cpp-inlining [.] std::generate_canonical<double, 53ul, std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > (inlined)
12.29% 0.00% cpp-inlining cpp-inlining [.] std::__detail::_Mod<unsigned long, 2147483647ul, 16807ul, 0ul, true, true>::__calc (inlined)
12.29% 0.00% cpp-inlining cpp-inlining [.] std::__detail::__mod<unsigned long, 2147483647ul, 16807ul, 0ul> (inlined)
12.29% 0.00% cpp-inlining cpp-inlining [.] std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>::operator() (inlined)
0.52% 0.52% cpp-inlining libm-2.25.so [.] cabs
~~~~~
Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yao Jin <yao.jin@linux.intel.com>
Link: http://lkml.kernel.org/r/20171009203310.17362-11-milian.wolff@kdab.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
Milian Wolff
|
9856240ad3 |
perf callchain: Compare symbol name for inlined frames when matching
The fake symbols we create for inlined frames will represent different
functions but can use the symbol start address. This leads to issues
when different inline branches all lead to the same function.
Before:
~~~~~
$ perf report -s sym -i perf.inlining.data --inline --stdio -g function
...
--38.86%--_start
__libc_start_main
main
|
--37.57%--std::norm<double> (inlined)
std::_Norm_helper<true>::_S_do_it<double> (inlined)
|
--36.36%--std::abs<double> (inlined)
std::__complex_abs (inlined)
|
--12.24%--std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>::operator() (inlined)
std::__detail::__mod<unsigned long, 2147483647ul, 16807ul, 0ul> (inlined)
std::__detail::_Mod<unsigned long, 2147483647ul, 16807ul, 0ul, true, true>::__calc (inlined)
~~~~~
Note that this backtrace representation is completely bogus.
Complex abs does not call the linear congruential engine! It
is just a side-effect of a longer inlined stack being appended
to a shorter, different inlined stack, both of which originate
in the same function (main).
This patch fixes the issue:
~~~~~
$ perf report -s sym -i perf.inlining.data --inline --stdio -g function
...
--38.86%--_start
__libc_start_main
main
|
|--35.59%--std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > (inlined)
| std::uniform_real_distribution<double>::operator()<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > (inlined)
| |
| --34.37%--std::__detail::_Adaptor<std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>, double>::operator() (inlined)
| std::generate_canonical<double, 53ul, std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul> > (inlined)
| |
| --12.24%--std::linear_congruential_engine<unsigned long, 16807ul, 0ul, 2147483647ul>::operator() (inlined)
| std::__detail::__mod<unsigned long, 2147483647ul, 16807ul, 0ul> (inlined)
| std::__detail::_Mod<unsigned long, 2147483647ul, 16807ul, 0ul, true, true>::__calc (inlined)
|
--1.99%--std::norm<double> (inlined)
std::_Norm_helper<true>::_S_do_it<double> (inlined)
std::abs<double> (inlined)
std::__complex_abs (inlined)
~~~~~
Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Yao Jin <yao.jin@linux.intel.com>
Link: http://lkml.kernel.org/r/20171009203310.17362-10-milian.wolff@kdab.com
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
[ Fix up conflict with
|
|
|
Milian Wolff
|
9628b56dc1 |
perf script: Mark inlined frames and do not print DSO for them
Instead of showing the (repeated) DSO name of the non-inlined frame, we
now show the "(inlined)" suffix instead.
Before:
214f7 __hypot_finite (/usr/lib/libm-2.25.so)
ace3 hypot (/usr/lib/libm-2.25.so)
a4a std::__complex_abs (/home/milian/projects/src/perf-tests/inlining)
a4a std::abs<double> (/home/milian/projects/src/perf-tests/inlining)
a4a std::_Norm_helper<true>::_S_do_it<double> (/home/milian/projects/src/perf-tests/inlining)
a4a std::norm<double> (/home/milian/projects/src/perf-tests/inlining)
a4a main (/home/milian/projects/src/perf-tests/inlining)
20510 __libc_start_main (/usr/lib/libc-2.25.so)
bd9 _start (/home/milian/projects/src/perf-tests/inlining)
After:
214f7 __hypot_finite (/usr/lib/libm-2.25.so)
ace3 hypot (/usr/lib/libm-2.25.so)
a4a std::__complex_abs (inlined)
a4a std::abs<double> (inlined)
a4a std::_Norm_helper<true>::_S_do_it<double> (inlined)
a4a std::norm<double> (inlined)
a4a main (/home/milian/projects/src/perf-tests/inlining)
20510 __libc_start_main (/usr/lib/libc-2.25.so)
bd9 _start (/home/milian/projects/src/perf-tests/inlining)
Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yao Jin <yao.jin@linux.intel.com>
Link: http://lkml.kernel.org/r/20171009203310.17362-9-milian.wolff@kdab.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
Milian Wolff
|
8932f8071c |
perf callchain: Mark inlined frames in output by " (inlined)" suffix
The original patch that introduced inline frame output in the various browsers used this suffix already. The new centralized approach that uses fake symbols for inlined frames was missing this approach so far. Instead of changing the symbol name itself, we only print the suffix where needed. This allows us to efficiently lookup the symbol for a given name without first having to append the suffix before the lookup. Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yao Jin <yao.jin@linux.intel.com> Link: http://lkml.kernel.org/r/20171009203310.17362-8-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
|
|
Milian Wolff
|
cbe50f6172 |
perf report: Fall-back to function name comparison for -g srcline
When a callchain entry has no srcline available, we ended up comparing
the instruction pointer. I consider this to be not too useful. Rather, I
think we should group the entries by function name, which this patch
adds. For people who want to split the data on the IP boundary, using
`-g address` is the correct choice.
Before:
~~~~~
100.00% 38.86% [.] main
|
|--61.14%--main inlining.cpp:14
| std::norm<double> complex:664
| std::_Norm_helper<true>::_S_do_it<double> complex:654
| std::abs<double> complex:597
| std::__complex_abs complex:589
| |
| |--56.03%--hypot
| | |
| | |--8.45%--__hypot_finite
| | |
| | |--7.62%--__hypot_finite
| | |
| | |--2.29%--__hypot_finite
| | |
| | |--2.24%--__hypot_finite
| | |
| | |--2.06%--__hypot_finite
| | |
| | |--1.81%--__hypot_finite
...
~~~~~
After:
~~~~~
100.00% 38.86% [.] main
|
|--61.14%--main inlining.cpp:14
| std::norm<double> complex:664
| std::_Norm_helper<true>::_S_do_it<double> complex:654
| std::abs<double> complex:597
| std::__complex_abs complex:589
| |
| |--60.29%--hypot
| | |
| | --56.03%--__hypot_finite
| |
| --0.85%--cabs
~~~~~
Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yao Jin <yao.jin@linux.intel.com>
Link: http://lkml.kernel.org/r/20171009203310.17362-7-milian.wolff@kdab.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
|
Milian Wolff
|
11ea2515f3 |
perf callchain: Create real callchain entries for inlined frames
The inline_node structs are maintained by the new dso->inlines tree. This in turn keeps ownership of the fake symbols and srcline string representing an inline frame. This tree is sorted by address to allow quick lookups. All other entries of the symbol beside the function name are unused for inline frames. The advantage of this approach is that all existing users of the callchain API can now transparently display inlined frames without having to patch their code. Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yao Jin <yao.jin@linux.intel.com> Link: http://lkml.kernel.org/r/20171009203310.17362-6-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
|
|
Milian Wolff
|
2be8832f3c |
perf callchain: Refactor inline_list to store srcline string directly
This is a preparation for the creation of real callchain entries for inlined frames. The rest of the perf code uses the srcline string. As such, using that also for the srcline API allows us to simplify some of the upcoming code. Most notably, it will allow us to cache the srcline for a given inline node and reuse it for different callchain entries. Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yao Jin <yao.jin@linux.intel.com> Link: http://lkml.kernel.org/r/20171009203310.17362-5-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
|
|
Milian Wolff
|
fea0cf842c |
perf callchain: Refactor inline_list to operate on symbols
This is a requirement to create real callchain entries for inlined frames. Since the list of inlines usually contains the target symbol too, i.e. the location where the frames get inlined to, we alias that symbol and reuse it as-is is. This ensures that other dependent functionality keeps working, most notably annotation of the target frames. For all other entries in the inline_list, a fake symbol is created. These are marked by new 'inlined' member which is set to true. Only those symbols are managed by the inline_list and get freed when the inline_list is deleted from within inline_node__delete. Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yao Jin <yao.jin@linux.intel.com> Link: http://lkml.kernel.org/r/20171009203310.17362-4-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Milian Wolff
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40a342cda2 |
perf callchain: Store srcline in callchain_cursor_node
This is mostly a preparation to enable the creation of full callchain nodes for inline frames. Such frames will reference the IP of the non-inlined frame, but hold the symbol and srcline for an inlined location. As such, we won't be able to query the srcline on-demand based on the IP alone. Instead, we will leverage the functionality provided by this patch here, and store the srcline for the inlined nodes in the new srcline member of callchain_cursor_node. Note that this patch on its own leaks the srcline, as there is no free_callchain_cursor_node or similar. A future patch will add caching of the srcline and handle deletion properly. Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yao Jin <yao.jin@linux.intel.com> Link: http://lkml.kernel.org/r/20171009203310.17362-3-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Milian Wolff
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2a704fc8db |
perf report: Remove code to handle inline frames from browsers
The follow-up commits will make inline frames first-class citizens in the callchain, thereby obsoleting all of this special code. Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yao Jin <yao.jin@linux.intel.com> Link: http://lkml.kernel.org/r/20171009203310.17362-2-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Kan Liang
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65db92e096 |
perf vendor events: Add Goldmont Plus V1 event file
Add a Intel event file for perf. Signed-off-by: Kan Liang <Kan.liang@intel.com> Acked-by: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1508331907-395162-1-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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b1f03ca4ee |
perf namespaces: Add more appropriate set of headers
We don't need perf.h, that is a kitchen sink, all we need is perf_events.h for perf_ns_link_info, sys/types.h for pid_t and linux/types.h for u64, list_head. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Li Zhijian <lizhijian@cn.fujitsu.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-f2uxyaj4s2hmntkrezpa6dqz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Christophe JAILLET
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79f56ebe2a |
perf kmem: Perform some cleanup if '--time' is given an invalid value
If the string passed in '--time' is invalid, we must do some cleanup
before leaving. As in the other error handling paths of this function.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: kernel-janitors@vger.kernel.org
Fixes:
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Christophe JAILLET
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db49bc155a |
perf script: Fix error handling path
If the string passed in '--time' is invalid, or if failed to set libtraceevent function resolver, we must do some cleanup before leaving. As in the other error handling paths of this function. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-janitors@vger.kernel.org Link: http://lkml.kernel.org/r/20170916062537.28921-1-christophe.jaillet@wanadoo.fr Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |