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authorTejun Heo <tj@kernel.org>2010-10-05 12:49:55 +0400
committerTejun Heo <tj@kernel.org>2010-10-05 12:49:55 +0400
commitcdadf0097cdca06c497ffaeb5982e028c6e4ed38 (patch)
treee02400ea54981e9621a30d3a2ce013e14f657e2e /include/trace
parent97bd234701b2b39a0e749c1fe0e44f1d14c94292 (diff)
downloadlinux-cdadf0097cdca06c497ffaeb5982e028c6e4ed38.tar.xz
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 <tj@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/workqueue.h53
1 files changed, 53 insertions, 0 deletions
diff --git a/include/trace/events/workqueue.h b/include/trace/events/workqueue.h
index ec9d7244eb9f..7d497291c85d 100644
--- a/include/trace/events/workqueue.h
+++ b/include/trace/events/workqueue.h
@@ -25,6 +25,59 @@ DECLARE_EVENT_CLASS(workqueue_work,
);
/**
+ * workqueue_queue_work - called when a work gets queued
+ * @req_cpu: the requested cpu
+ * @cwq: pointer to struct cpu_workqueue_struct
+ * @work: pointer to struct work_struct
+ *
+ * This event occurs when a work is queued immediately or once a
+ * delayed work is actually queued on a workqueue (ie: once the delay
+ * has been reached).
+ */
+TRACE_EVENT(workqueue_queue_work,
+
+ TP_PROTO(unsigned int req_cpu, struct cpu_workqueue_struct *cwq,
+ struct work_struct *work),
+
+ TP_ARGS(req_cpu, cwq, work),
+
+ TP_STRUCT__entry(
+ __field( void *, work )
+ __field( void *, function)
+ __field( void *, workqueue)
+ __field( unsigned int, req_cpu )
+ __field( unsigned int, cpu )
+ ),
+
+ TP_fast_assign(
+ __entry->work = work;
+ __entry->function = work->func;
+ __entry->workqueue = cwq->wq;
+ __entry->req_cpu = req_cpu;
+ __entry->cpu = cwq->gcwq->cpu;
+ ),
+
+ TP_printk("work struct=%p function=%pf workqueue=%p req_cpu=%u cpu=%u",
+ __entry->work, __entry->function, __entry->workqueue,
+ __entry->req_cpu, __entry->cpu)
+);
+
+/**
+ * workqueue_activate_work - called when a work gets activated
+ * @work: pointer to struct work_struct
+ *
+ * This event occurs when a queued work is put on the active queue,
+ * which happens immediately after queueing unless @max_active limit
+ * is reached.
+ */
+DEFINE_EVENT(workqueue_work, workqueue_activate_work,
+
+ TP_PROTO(struct work_struct *work),
+
+ TP_ARGS(work)
+);
+
+/**
* workqueue_execute_start - called immediately before the workqueue callback
* @work: pointer to struct work_struct
*