diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-05-28 16:00:29 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-06-05 10:09:54 -0300 |
| commit | 27de9b2bd996de0ca4079c42c81c85158e10145c (patch) | |
| tree | 98202794dad73383f1a5e865445c3c04b91d068c /tools/perf/util | |
| parent | 9d0199cd2a7a326510fc7f731d7974ef2fbc03d0 (diff) | |
| download | lwn-27de9b2bd996de0ca4079c42c81c85158e10145c.tar.gz lwn-27de9b2bd996de0ca4079c42c81c85158e10145c.zip | |
perf evsel: Add has_callchain() helper to make code more compact/clear
Its common to have the (evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN),
so add an evsel__has_callchain(evsel) helper.
This will actually get more uses as we check that instead of
symbol_conf.use_callchain in places where that produces the same result
but makes this decision to be more fine grained, per evsel.
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: https://lkml.kernel.org/n/tip-145340oytbthatpfeaq1do18@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/evsel.c | 4 | ||||
| -rw-r--r-- | tools/perf/util/evsel.h | 5 | ||||
| -rw-r--r-- | tools/perf/util/hist.c | 2 | ||||
| -rw-r--r-- | tools/perf/util/session.c | 2 |
4 files changed, 9 insertions, 4 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 150db5ed7400..94fce4f537e9 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -2197,7 +2197,7 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event, } } - if (type & PERF_SAMPLE_CALLCHAIN) { + if (evsel__has_callchain(evsel)) { const u64 max_callchain_nr = UINT64_MAX / sizeof(u64); OVERFLOW_CHECK_u64(array); @@ -2857,7 +2857,7 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target, "Hint: Try again after reducing the number of events.\n" "Hint: Try increasing the limit with 'ulimit -n <limit>'"); case ENOMEM: - if ((evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) != 0 && + if (evsel__has_callchain(evsel) && access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0) return scnprintf(msg, size, "Not enough memory to setup event with callchain.\n" diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index b13f5f234c8f..d277930b19a1 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -459,6 +459,11 @@ static inline bool perf_evsel__has_branch_callstack(const struct perf_evsel *evs return evsel->attr.branch_sample_type & PERF_SAMPLE_BRANCH_CALL_STACK; } +static inline bool evsel__has_callchain(const struct perf_evsel *evsel) +{ + return (evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) != 0; +} + typedef int (*attr__fprintf_f)(FILE *, const char *, const char *, void *); int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr, diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c index 95333b068109..34864c87cd3c 100644 --- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -1757,7 +1757,7 @@ void perf_evsel__output_resort(struct perf_evsel *evsel, struct ui_progress *pro bool use_callchain; if (evsel && symbol_conf.use_callchain && !symbol_conf.show_ref_callgraph) - use_callchain = evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN; + use_callchain = evsel__has_callchain(evsel); else use_callchain = symbol_conf.use_callchain; diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index b998bb475589..8b9369303561 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1094,7 +1094,7 @@ static void dump_sample(struct perf_evsel *evsel, union perf_event *event, sample_type = evsel->attr.sample_type; - if (sample_type & PERF_SAMPLE_CALLCHAIN) + if (evsel__has_callchain(evsel)) callchain__printf(evsel, sample); if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel)) |