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perf sched: No need to keep the session around

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We were keeping the session around just because we kept pointers to
struct thread instances, but now we reference count them, so no need
for deferring the perf_session__delete call to after we traverse the
work_list entries.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-9agtck6jdr3rebdp39z1lo0e@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2015-03-02 22:28:41 -03:00
parent f3b623b849
commit ae536acfac
1 changed files with 8 additions and 16 deletions
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24
tools/perf/builtin-sched.c
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@ -1439,8 +1439,7 @@ static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_
return err; return err;
} }
static int perf_sched__read_events(struct perf_sched *sched, static int perf_sched__read_events(struct perf_sched *sched)
struct perf_session **psession)
{ {
const struct perf_evsel_str_handler handlers[] = { const struct perf_evsel_str_handler handlers[] = {
{ "sched:sched_switch", process_sched_switch_event, }, { "sched:sched_switch", process_sched_switch_event, },
@ -1454,6 +1453,7 @@ static int perf_sched__read_events(struct perf_sched *sched,
.path = input_name, .path = input_name,
.mode = PERF_DATA_MODE_READ, .mode = PERF_DATA_MODE_READ,
}; };
int rc = -1;
session = perf_session__new(&file, false, &sched->tool); session = perf_session__new(&file, false, &sched->tool);
if (session == NULL) { if (session == NULL) {
@ -1478,16 +1478,10 @@ static int perf_sched__read_events(struct perf_sched *sched,
sched->nr_lost_chunks = session->evlist->stats.nr_events[PERF_RECORD_LOST]; sched->nr_lost_chunks = session->evlist->stats.nr_events[PERF_RECORD_LOST];
} }
if (psession) rc = 0;
*psession = session;
else
perf_session__delete(session);
return 0;
out_delete: out_delete:
perf_session__delete(session); perf_session__delete(session);
return -1; return rc;
} }
static void print_bad_events(struct perf_sched *sched) static void print_bad_events(struct perf_sched *sched)
@ -1515,12 +1509,10 @@ static void print_bad_events(struct perf_sched *sched)
static int perf_sched__lat(struct perf_sched *sched) static int perf_sched__lat(struct perf_sched *sched)
{ {
struct rb_node *next; struct rb_node *next;
struct perf_session *session;
setup_pager(); setup_pager();
/* save session -- references to threads are held in work_list */ if (perf_sched__read_events(sched))
if (perf_sched__read_events(sched, &session))
return -1; return -1;
perf_sched__sort_lat(sched); perf_sched__sort_lat(sched);
@ -1537,6 +1529,7 @@ static int perf_sched__lat(struct perf_sched *sched)
work_list = rb_entry(next, struct work_atoms, node); work_list = rb_entry(next, struct work_atoms, node);
output_lat_thread(sched, work_list); output_lat_thread(sched, work_list);
next = rb_next(next); next = rb_next(next);
thread__zput(work_list->thread);
} }
printf(" -----------------------------------------------------------------------------------------------------------------\n"); printf(" -----------------------------------------------------------------------------------------------------------------\n");
@ -1548,7 +1541,6 @@ static int perf_sched__lat(struct perf_sched *sched)
print_bad_events(sched); print_bad_events(sched);
printf("\n"); printf("\n");
perf_session__delete(session);
return 0; return 0;
} }
@ -1557,7 +1549,7 @@ static int perf_sched__map(struct perf_sched *sched)
sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF); sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF);
setup_pager(); setup_pager();
if (perf_sched__read_events(sched, NULL)) if (perf_sched__read_events(sched))
return -1; return -1;
print_bad_events(sched); print_bad_events(sched);
return 0; return 0;
@ -1572,7 +1564,7 @@ static int perf_sched__replay(struct perf_sched *sched)
test_calibrations(sched); test_calibrations(sched);
if (perf_sched__read_events(sched, NULL)) if (perf_sched__read_events(sched))
return -1; return -1;
printf("nr_run_events: %ld\n", sched->nr_run_events); printf("nr_run_events: %ld\n", sched->nr_run_events);