diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2013-11-01 15:51:34 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-11-14 16:10:27 -0300 |
| commit | 539e6bb71e350541105e67e3d6c31392d9da25ef (patch) | |
| tree | 28f5b908b42bee694cddad30d2fc1f15c66315e6 /tools/perf/util | |
| parent | 35e17b2450e09968f9702d4048c228199af171bc (diff) | |
| download | linux-539e6bb71e350541105e67e3d6c31392d9da25ef.tar.bz2 | |
perf record: Add an option to force per-cpu mmaps
By default, when tasks are specified (i.e. -p, -t or -u options)
per-thread mmaps are created.
Add an option to override that and force per-cpu mmaps.
Further comments by peterz:
So this option allows -t/-p/-u to create one buffer per cpu and attach
all the various thread/process/user tasks' their counters to that one
buffer?
As opposed to the current state where each such counter would have its
own buffer.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1383313899-15987-7-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/evlist.c | 4 | ||||
| -rw-r--r-- | tools/perf/util/evsel.c | 4 | ||||
| -rw-r--r-- | tools/perf/util/target.h | 1 |
3 files changed, 6 insertions, 3 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 5ce2ace2d6c1..bbc746aa5716 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -819,7 +819,9 @@ int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) if (evlist->threads == NULL) return -1; - if (target__has_task(target)) + if (target->force_per_cpu) + evlist->cpus = cpu_map__new(target->cpu_list); + else if (target__has_task(target)) evlist->cpus = cpu_map__dummy_new(); else if (!target__has_cpu(target) && !target->uses_mmap) evlist->cpus = cpu_map__dummy_new(); diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 18f7c188ff63..46dd4c2a41ce 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -645,7 +645,7 @@ void perf_evsel__config(struct perf_evsel *evsel, } } - if (target__has_cpu(&opts->target)) + if (target__has_cpu(&opts->target) || opts->target.force_per_cpu) perf_evsel__set_sample_bit(evsel, CPU); if (opts->period) @@ -653,7 +653,7 @@ void perf_evsel__config(struct perf_evsel *evsel, if (!perf_missing_features.sample_id_all && (opts->sample_time || !opts->no_inherit || - target__has_cpu(&opts->target))) + target__has_cpu(&opts->target) || opts->target.force_per_cpu)) perf_evsel__set_sample_bit(evsel, TIME); if (opts->raw_samples) { diff --git a/tools/perf/util/target.h b/tools/perf/util/target.h index 89bab7129de4..2d0c50690892 100644 --- a/tools/perf/util/target.h +++ b/tools/perf/util/target.h @@ -12,6 +12,7 @@ struct target { uid_t uid; bool system_wide; bool uses_mmap; + bool force_per_cpu; }; enum target_errno { |