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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.

Tejun Heo committed 16 years ago

Commit cdadf001 parent 97bd2342 files · +56 −0Browse files

Showing the changes to kernel/workqueue.c (1 of 2 files). Show all

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kernel/workqueue.c+3−0
@@ -997,6 +997,7 @@ static void __queue_work(unsigned int cpu, struct workqueue_struct *wq, · 996 unmodified lines
997 997
998 /* gcwq determined, get cwq and queue */998 /* gcwq determined, get cwq and queue */
999 cwq = get_cwq(gcwq->cpu, wq);999 cwq = get_cwq(gcwq->cpu, wq);
1000 trace_workqueue_queue_work(cpu, cwq, work);
1000 1001
1001 BUG_ON(!list_empty(&work->entry));1002 BUG_ON(!list_empty(&work->entry));
1002 1003
@@ -1004,6 +1005,7 @@ static void __queue_work(unsigned int cpu, struct workqueue_struct *wq, · 1 unmodified line
1004 work_flags = work_color_to_flags(cwq->work_color);1005 work_flags = work_color_to_flags(cwq->work_color);
1005 1006
1006 if (likely(cwq->nr_active < cwq->max_active)) {1007 if (likely(cwq->nr_active < cwq->max_active)) {
1008 trace_workqueue_activate_work(work);
1007 cwq->nr_active++;1009 cwq->nr_active++;
1008 worklist = gcwq_determine_ins_pos(gcwq, cwq);1010 worklist = gcwq_determine_ins_pos(gcwq, cwq);
1009 } else {1011 } else {
@@ -1679,6 +1681,7 @@ static void cwq_activate_first_delayed(struct cpu_workqueue_struct *cwq) · 669 unmodified lines
1679 struct work_struct, entry);1681 struct work_struct, entry);
1680 struct list_head *pos = gcwq_determine_ins_pos(cwq->gcwq, cwq);1682 struct list_head *pos = gcwq_determine_ins_pos(cwq->gcwq, cwq);
1681 1683
1684 trace_workqueue_activate_work(work);
1682 move_linked_works(work, pos, NULL);1685 move_linked_works(work, pos, NULL);
1683 __clear_bit(WORK_STRUCT_DELAYED_BIT, work_data_bits(work));1686 __clear_bit(WORK_STRUCT_DELAYED_BIT, work_data_bits(work));
1684 cwq->nr_active++;1687 cwq->nr_active++;