From af64865ba6825e10fe62a3105fea5cadffeb52c6 Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Tue, 1 Jun 2010 00:03:40 +0200 Subject: [PATCH] perf: Use event__process_task from perf sched perf sched uses event__process_comm(), which means it can resolve comms from: - tasks that have exec'ed (kernel comm events) - tasks that were running when perf record started the actual recording (synthetized comm events) But perf sched can't resolve the pids of tasks that were created after the recording started. To solve this, we need to inherit the comms on fork events using event__process_task(). This fixes various unresolved pids in perf sched, easily visible with: perf sched record perf bench sched messaging Signed-off-by: Frederic Weisbecker Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Paul Mackerras Cc: Tom Zanussi Cc: Stephane Eranian --- tools/perf/builtin-sched.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index f67bce2a83b4..55f3b5dcc731 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -1645,6 +1645,7 @@ static struct perf_event_ops event_ops = { .sample = process_sample_event, .comm = event__process_comm, .lost = event__process_lost, + .fork = event__process_task, .ordered_samples = true, }; -- GitLab