From cdadf0097cdca06c497ffaeb5982e028c6e4ed38 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 5 Oct 2010 10:49:55 +0200 Subject: workqueue: add queue_work and activate_work trace points These two tracepoints allow tracking when and how a work is queued and activated. This patch is based on Frederic's patch to add queue_work trace point. Signed-off-by: Tejun Heo Cc: Frederic Weisbecker --- kernel/workqueue.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'kernel/workqueue.c') diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 026f778e879b..cb2ccfbed0c6 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -997,6 +997,7 @@ static void __queue_work(unsigned int cpu, struct workqueue_struct *wq, /* gcwq determined, get cwq and queue */ cwq = get_cwq(gcwq->cpu, wq); + trace_workqueue_queue_work(cpu, cwq, work); BUG_ON(!list_empty(&work->entry)); @@ -1004,6 +1005,7 @@ static void __queue_work(unsigned int cpu, struct workqueue_struct *wq, work_flags = work_color_to_flags(cwq->work_color); if (likely(cwq->nr_active < cwq->max_active)) { + trace_workqueue_activate_work(work); cwq->nr_active++; worklist = gcwq_determine_ins_pos(gcwq, cwq); } else { @@ -1679,6 +1681,7 @@ static void cwq_activate_first_delayed(struct cpu_workqueue_struct *cwq) struct work_struct, entry); struct list_head *pos = gcwq_determine_ins_pos(cwq->gcwq, cwq); + trace_workqueue_activate_work(work); move_linked_works(work, pos, NULL); __clear_bit(WORK_STRUCT_DELAYED_BIT, work_data_bits(work)); cwq->nr_active++; -- cgit v1.2.3