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perf/record: simplify TRACE_INFO tracepoint check 

Fix a couple of inefficiencies and redundancies related to
have_tracepoints() and its use when checking whether to write
TRACE_INFO.

First, there's no need to use get_tracepoints_path() in
have_tracepoints() - we really just want the part that checks whether
any attributes correspondo to tracepoints.

Second, we really don't care about raw_samples per se - tracepoints
are always raw_samples.  In any case, the have_tracepoints() check
should be sufficient to decide whether or not to write TRACE_INFO.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>,
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <1273030770.6383.6.camel@tropicana>
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Tom Zanussi 2010-05-04 22:20:16 -05:00 committed by Arnaldo Carvalho de Melo
parent 9890948d85
commit db620b1c2f
2 changed files with 8 additions and 11 deletions
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11
tools/perf/builtin-record.c
View File

@ -560,17 +560,8 @@ static int __cmd_record(int argc, const char **argv)
return err;
}
if (raw_samples && have_tracepoints(attrs, nr_counters)) {
if (have_tracepoints(attrs, nr_counters))
perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
} else {
for (i = 0; i < nr_counters; i++) {
if (attrs[i].sample_type & PERF_SAMPLE_RAW &&
attrs[i].type == PERF_TYPE_TRACEPOINT) {
perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
break;
}
}
}
atexit(atexit_header);

8
tools/perf/util/trace-event-info.c
View File

@ -489,7 +489,13 @@ get_tracepoints_path(struct perf_event_attr *pattrs, int nb_events)
bool have_tracepoints(struct perf_event_attr *pattrs, int nb_events)
{
return get_tracepoints_path(pattrs, nb_events) ? true : false;
int i;
for (i = 0; i < nb_events; i++)
if (pattrs[i].type == PERF_TYPE_TRACEPOINT)
return true;
return false;
}
int read_tracing_data(int fd, struct perf_event_attr *pattrs, int nb_events)