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perf tools: Release thread resources on PERF_RECORD_EXIT

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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>
This commit is contained in:
Arnaldo Carvalho de Melo 2010-07-30 18:28:42 -03:00
parent 0e60836bbd
commit 591765fdaf
5 changed files with 61 additions and 0 deletions
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18
tools/perf/util/build-id.c
View file

@ -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)