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| author | Kan Liang <kan.liang@intel.com> | 2015-08-11 10:30:47 (GMT) |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-08-12 16:20:27 (GMT) |
| commit | d457c96392bb418bd998f3ccf93e0e4c958fcd0f (patch) | |
| tree | 39588c97ab0c7250fdfc9e85be87519cd82d2332 /tools/perf/util/pmu.c | |
| parent | 75186a9b09e47072f442f43e292cd47180b67b5c (diff) | |
| download | linux-d457c96392bb418bd998f3ccf93e0e4c958fcd0f.tar.xz | |
perf callchain: Per-event type selection support
This patchkit adds the ability to set callgraph mode (fp, dwarf, lbr) per
event. This in term can reduce sampling overhead and the size of the
perf.data.
Here is an example.
perf record -e 'cpu/cpu-cycles,period=1000,call-graph=fp,time=1/,cpu/instructions,call-graph=lbr/' sleep 1
perf evlist -v
cpu/cpu-cycles,period=1000,call-graph=fp,time=1/: type: 4, size: 112,
config: 0x3c, { sample_period, sample_freq }: 1000, sample_type:
IP|TID|TIME|CALLCHAIN|PERIOD|IDENTIFIER, read_format: ID, disabled: 1,
inherit: 1, mmap: 1, comm: 1, enable_on_exec: 1, task: 1, sample_id_all:
1, exclude_guest: 1, mmap2: 1, comm_exec: 1
cpu/instructions,call-graph=lbr/: type: 4, size: 112, config: 0xc0, {
sample_period, sample_freq }: 4000, sample_type:
IP|TID|TIME|CALLCHAIN|PERIOD|BRANCH_STACK|IDENTIFIER, read_format: ID,
disabled: 1, inherit: 1, freq: 1, enable_on_exec: 1, sample_id_all: 1,
exclude_guest: 1
Signed-off-by: Kan Liang <kan.liang@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1439289050-40510-1-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/pmu.c')
| -rw-r--r-- | tools/perf/util/pmu.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index d85f11b..84cad05 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -634,7 +634,9 @@ static char *formats_error_string(struct list_head *formats) { struct perf_pmu_format *format; char *err, *str; - static const char *static_terms = "config,config1,config2,name,period,freq,branch_type,time\n"; + static const char *static_terms = "config,config1,config2,name," + "period,freq,branch_type,time," + "call-graph,stack-size\n"; unsigned i = 0; if (!asprintf(&str, "valid terms:")) |