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perf evsel: Add has_callchain() helper to make code more compact/clear

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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>
This commit is contained in:
Arnaldo Carvalho de Melo
2018-05-28 16:00:29 -03:00
parent 9d0199cd2a
commit 27de9b2bd9
8 changed files with 16 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
tools/perf/util/evsel.c
View File

@@ -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"

5
tools/perf/util/evsel.h
View File

@@ -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,

2
tools/perf/util/hist.c
View File

@@ -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;

2
tools/perf/util/session.c
View File

@@ -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))