cdadf0097c
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>
121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM workqueue
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#if !defined(_TRACE_WORKQUEUE_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_WORKQUEUE_H
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#include <linux/tracepoint.h>
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#include <linux/workqueue.h>
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DECLARE_EVENT_CLASS(workqueue_work,
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TP_PROTO(struct work_struct *work),
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TP_ARGS(work),
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TP_STRUCT__entry(
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__field( void *, work )
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),
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TP_fast_assign(
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__entry->work = work;
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),
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TP_printk("work struct %p", __entry->work)
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);
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/**
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* workqueue_queue_work - called when a work gets queued
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* @req_cpu: the requested cpu
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* @cwq: pointer to struct cpu_workqueue_struct
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* @work: pointer to struct work_struct
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*
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* This event occurs when a work is queued immediately or once a
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* delayed work is actually queued on a workqueue (ie: once the delay
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* has been reached).
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*/
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TRACE_EVENT(workqueue_queue_work,
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TP_PROTO(unsigned int req_cpu, struct cpu_workqueue_struct *cwq,
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struct work_struct *work),
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TP_ARGS(req_cpu, cwq, work),
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TP_STRUCT__entry(
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__field( void *, work )
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__field( void *, function)
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__field( void *, workqueue)
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__field( unsigned int, req_cpu )
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__field( unsigned int, cpu )
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),
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TP_fast_assign(
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__entry->work = work;
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__entry->function = work->func;
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__entry->workqueue = cwq->wq;
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__entry->req_cpu = req_cpu;
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__entry->cpu = cwq->gcwq->cpu;
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),
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TP_printk("work struct=%p function=%pf workqueue=%p req_cpu=%u cpu=%u",
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__entry->work, __entry->function, __entry->workqueue,
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__entry->req_cpu, __entry->cpu)
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);
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/**
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* workqueue_activate_work - called when a work gets activated
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* @work: pointer to struct work_struct
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*
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* This event occurs when a queued work is put on the active queue,
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* which happens immediately after queueing unless @max_active limit
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* is reached.
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*/
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DEFINE_EVENT(workqueue_work, workqueue_activate_work,
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TP_PROTO(struct work_struct *work),
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TP_ARGS(work)
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);
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/**
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* workqueue_execute_start - called immediately before the workqueue callback
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* @work: pointer to struct work_struct
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*
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* Allows to track workqueue execution.
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*/
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TRACE_EVENT(workqueue_execute_start,
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TP_PROTO(struct work_struct *work),
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TP_ARGS(work),
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TP_STRUCT__entry(
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__field( void *, work )
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__field( void *, function)
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),
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TP_fast_assign(
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__entry->work = work;
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__entry->function = work->func;
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),
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TP_printk("work struct %p: function %pf", __entry->work, __entry->function)
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);
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/**
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* workqueue_execute_end - called immediately before the workqueue callback
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* @work: pointer to struct work_struct
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*
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* Allows to track workqueue execution.
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*/
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DEFINE_EVENT(workqueue_work, workqueue_execute_end,
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TP_PROTO(struct work_struct *work),
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TP_ARGS(work)
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);
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#endif /* _TRACE_WORKQUEUE_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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