diff options
author | Song Liu <song@kernel.org> | 2021-04-25 14:43:31 -0700 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-04-29 10:30:58 -0300 |
commit | 112cb56164bc2108a55aee785d841a35aab0616a (patch) | |
tree | fec53329a1865ca4f3a26f09e4f74f2b816b1e5b /tools/perf/util/evsel.c | |
parent | fe3dd8263b9f3912a0f3a2f66c0fdb3987d69a1a (diff) |
perf stat: Introduce config stat.bpf-counter-events
Currently, to use BPF to aggregate perf event counters, the user uses
--bpf-counters option. Enable "use bpf by default" events with a config
option, stat.bpf-counter-events. Events with name in the option will use
BPF.
This also enables mixed BPF event and regular event in the same sesssion.
For example:
perf config stat.bpf-counter-events=instructions
perf stat -e instructions,cs
The second command will use BPF for "instructions" but not "cs".
Signed-off-by: Song Liu <song@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/r/20210425214333.1090950-4-song@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evsel.c')
-rw-r--r-- | tools/perf/util/evsel.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 2d2614eeaa20..080ddcfefbcd 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -492,6 +492,28 @@ const char *evsel__hw_names[PERF_COUNT_HW_MAX] = { "ref-cycles", }; +char *evsel__bpf_counter_events; + +bool evsel__match_bpf_counter_events(const char *name) +{ + int name_len; + bool match; + char *ptr; + + if (!evsel__bpf_counter_events) + return false; + + ptr = strstr(evsel__bpf_counter_events, name); + name_len = strlen(name); + + /* check name matches a full token in evsel__bpf_counter_events */ + match = (ptr != NULL) && + ((ptr == evsel__bpf_counter_events) || (*(ptr - 1) == ',')) && + ((*(ptr + name_len) == ',') || (*(ptr + name_len) == '\0')); + + return match; +} + static const char *__evsel__hw_name(u64 config) { if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config]) |