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authorArnaldo Carvalho de Melo <acme@redhat.com>2010-07-30 18:28:42 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-07-30 18:28:42 -0300
commit591765fdaf7ea1888157f342b67b0461f2e5ed9b (patch)
tree278c5c7e219830596b03bc9ca1aa2a38e69e458e /tools/perf/util/build-id.c
parent0e60836bbd392300198c5c2d918c18845428a1fe (diff)
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perf tools: Release thread resources on PERF_RECORD_EXIT
For long running sessions with many threads with short lifetimes the amount of memory that the buildid process takes is too much. Since we don't have hist_entries that may be pointing to them, we can just release the resources associated with each thread when the exit (PERF_RECORD_EXIT) event is received. For normal processing we need to annotate maps with hits, and thus hist_entries pointing to it and drop the ones that had none. Will be done in a followup patch. Cc: David S. Miller <davem@davemloft.net> 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 <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/build-id.c')
-rw-r--r--tools/perf/util/build-id.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 5c26e2d314af..e437edb72417 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -12,6 +12,7 @@
#include "event.h"
#include "symbol.h"
#include <linux/kernel.h>
+#include "debug.h"
static int build_id__mark_dso_hit(event_t *event, struct perf_session *session)
{
@@ -34,10 +35,27 @@ static int build_id__mark_dso_hit(event_t *event, struct perf_session *session)
return 0;
}
+static int event__exit_del_thread(event_t *self, struct perf_session *session)
+{
+ struct thread *thread = perf_session__findnew(session, self->fork.tid);
+
+ dump_printf("(%d:%d):(%d:%d)\n", self->fork.pid, self->fork.tid,
+ self->fork.ppid, self->fork.ptid);
+
+ if (thread) {
+ rb_erase(&thread->rb_node, &session->threads);
+ session->last_match = NULL;
+ thread__delete(thread);
+ }
+
+ return 0;
+}
+
struct perf_event_ops build_id__mark_dso_hit_ops = {
.sample = build_id__mark_dso_hit,
.mmap = event__process_mmap,
.fork = event__process_task,
+ .exit = event__exit_del_thread,
};
char *dso__build_id_filename(struct dso *self, char *bf, size_t size)