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perf record: Add --all-user/--all-kernel options 

Allow user to easily switch all events to user or kernel space with simple
--all-user or --all-kernel options.

This will be handy within perf mem/c2c wrappers to switch easily monitoring
modes.

Committer note:

Testing it:

  # perf record --all-kernel --all-user -a sleep 2
   Error: option `all-user' cannot be used with all-kernel
   Usage: perf record [<options>] [<command>]
      or: perf record [<options>] -- <command> [<options>]

        --all-user        Configure all used events to run in user space.
        --all-kernel      Configure all used events to run in kernel space.
  # perf record --all-user --all-kernel -a sleep 2
   Error: option `all-kernel' cannot be used with all-user
   Usage: perf record [<options>] [<command>]
      or: perf record [<options>] -- <command> [<options>]

        --all-kernel      Configure all used events to run in kernel space.
        --all-user        Configure all used events to run in user space.
  # perf record --all-user -a sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 1.416 MB perf.data (162 samples) ]
  # perf report | grep '\[k\]'
  # perf record --all-kernel -a sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 1.423 MB perf.data (296 samples) ]
  # perf report | grep '\[\.\]'
  #

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1455525293-8671-2-git-send-email-jolsa@kernel.org
[ Made those options to be mutually exclusive ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2016-02-15 09:34:31 +01:00 committed by Arnaldo Carvalho de Melo
parent a55e566376
commit 85723885fe
4 changed files with 24 additions and 0 deletions
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6
tools/perf/Documentation/perf-record.txt
View File

@ -341,6 +341,12 @@ Specify vmlinux path which has debuginfo.
--buildid-all::
Record build-id of all DSOs regardless whether it's actually hit or not.
--all-kernel::
Configure all used events to run in kernel space.
--all-user::
Configure all used events to run in user space.
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-list[1]

6
tools/perf/builtin-record.c
View File

@ -1140,6 +1140,12 @@ struct option __record_options[] = {
"per thread proc mmap processing timeout in ms"),
OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events,
"Record context switch events"),
OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel,
"Configure all used events to run in kernel space.",
PARSE_OPT_EXCLUSIVE),
OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user,
"Configure all used events to run in user space.",
PARSE_OPT_EXCLUSIVE),
OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path",
"clang binary to use for compiling BPF scriptlets"),
OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options",

2
tools/perf/perf.h
View File

@ -58,6 +58,8 @@ struct record_opts {
bool full_auxtrace;
bool auxtrace_snapshot_mode;
bool record_switch_events;
bool all_kernel;
bool all_user;
unsigned int freq;
unsigned int mmap_pages;
unsigned int auxtrace_mmap_pages;

10
tools/perf/util/evsel.c
View File

@ -898,6 +898,16 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
if (evsel->precise_max)
perf_event_attr__set_max_precise_ip(attr);
if (opts->all_user) {
attr->exclude_kernel = 1;
attr->exclude_user = 0;
}
if (opts->all_kernel) {
attr->exclude_kernel = 0;
attr->exclude_user = 1;
}
/*
* Apply event specific term settings,
* it overloads any global configuration.