trace_workqueue_queue_work – called when a work gets queued Synopsis void trace_workqueue_queue_work(unsigned int req_cpu, struct pool_workqueue *pwq, struct work_struct *work); Arguments req_cpu the requested cpu pwq pointer to struct pool_workqueue work pointer to struct work_struct Description This event occurs when a work is queued immediately or once a delayed work is actually queued on a workqueue…
trace_workqueue_execute_start – called immediately before the workqueue callback Synopsis void trace_workqueue_execute_start(struct work_struct *work); Arguments work pointer to struct work_struct Description Allows to track workqueue execution. Authors Jason Baron <jbaron [at] redhat.com> Author. William Cohen <wcohen [at] redhat.com> Author. Copyright
trace_workqueue_execute_end – called immediately after the workqueue callback Synopsis void trace_workqueue_execute_end(struct work_struct *work); Arguments work pointer to struct work_struct Description Allows to track workqueue execution. Authors Jason Baron <jbaron [at] redhat.com> Author. William Cohen <wcohen [at] redhat.com> Author. Copyright
trace_workqueue_activate_work – called when a work gets activated Synopsis void trace_workqueue_activate_work(struct work_struct *work); Arguments work pointer to struct work_struct Description This event occurs when a queued work is put on the active queue, which happens immediately after queueing unless max_active limit is reached. Authors Jason Baron <jbaron [at] redhat.com> Author. William Cohen <wcohen [at] redhat.com>…
trace_softirq_raise – called immediately when a softirq is raised Synopsis void trace_softirq_raise(unsigned int vec_nr); Arguments vec_nr softirq vector number Description When used in combination with the softirq_entry tracepoint we can determine the softirq raise to run latency. Authors Jason Baron <jbaron [at] redhat.com> Author. William Cohen <wcohen [at] redhat.com> Author. Copyright
trace_softirq_exit – called immediately after the softirq handler returns Synopsis void trace_softirq_exit(unsigned int vec_nr); Arguments vec_nr softirq vector number Description When used in combination with the softirq_entry tracepoint we can determine the softirq handler routine. Authors Jason Baron <jbaron [at] redhat.com> Author. William Cohen <wcohen [at] redhat.com> Author. Copyright
trace_softirq_entry – called immediately before the softirq handler Synopsis void trace_softirq_entry(unsigned int vec_nr); Arguments vec_nr softirq vector number Description When used in combination with the softirq_exit tracepoint we can determine the softirq handler routine. Authors Jason Baron <jbaron [at] redhat.com> Author. William Cohen <wcohen [at] redhat.com> Author. Copyright
trace_signal_generate – called when a signal is generated Synopsis void trace_signal_generate(int sig, struct siginfo *info, struct task_struct *task, int group, int result); Arguments sig signal number info pointer to struct siginfo task pointer to struct task_struct group shared or private result TRACE_SIGNAL_* Description Current process sends a ‘sig’ signal to ‘task’ process with ‘info’ siginfo….
trace_signal_deliver – called when a signal is delivered Synopsis void trace_signal_deliver(int sig, struct siginfo *info, struct k_sigaction *ka); Arguments sig signal number info pointer to struct siginfo ka pointer to struct k_sigaction Description A ‘sig’ signal is delivered to current process with ‘info’ siginfo, and it will be handled by ‘ka’. ka->sa.sa_handler can be SIG_IGN…
trace_irq_handler_exit – called immediately after the irq action handler returns Synopsis void trace_irq_handler_exit(int irq, struct irqaction *action, int ret); Arguments irq irq number action pointer to struct irqaction ret return value Description If the ret value is set to IRQ_HANDLED, then we know that the corresponding action->handler successfully handled this irq. Otherwise, the irq might…
trace_irq_handler_entry – called immediately before the irq action handler Synopsis void trace_irq_handler_entry(int irq, struct irqaction *action); Arguments irq irq number action pointer to struct irqaction Description The struct irqaction pointed to by action contains various information about the handler, including the device name, action->name, and the device id, action->dev_id. When used in conjunction with the…
trace_block_unplug – release of operations requests in request queue Synopsis void trace_block_unplug(struct request_queue *q, unsigned int depth, bool explicit); Arguments q request queue to unplug depth number of requests just added to the queue explicit whether this was an explicit unplug, or one from schedule Description Unplug request queue q because device driver is scheduled…
trace_block_touch_buffer – mark a buffer accessed Synopsis void trace_block_touch_buffer(struct buffer_head *bh); Arguments bh buffer_head being touched Description Called from touch_buffer. Authors Jason Baron <jbaron [at] redhat.com> Author. William Cohen <wcohen [at] redhat.com> Author. Copyright
trace_block_split – split a single bio struct into two bio structs Synopsis void trace_block_split(struct request_queue *q, struct bio *bio, unsigned int new_sector); Arguments q queue containing the bio bio block operation being split new_sector The starting sector for the new bio Description The bio request bio in request queue q needs to be split into…
trace_block_sleeprq – waiting to get a free request entry in queue for block IO operation Synopsis void trace_block_sleeprq(struct request_queue *q, struct bio *bio, int rw); Arguments q queue for operation bio pending block IO operation rw low bit indicates a read (0) or a write (1) Description In the case where a request struct cannot…
trace_block_rq_requeue – place block IO request back on a queue Synopsis void trace_block_rq_requeue(struct request_queue *q, struct request *rq); Arguments q queue holding operation rq block IO operation request Description The block operation request rq is being placed back into queue q. For some reason the request was not completed and needs to be put back…
trace_block_rq_remap – map request for a block operation request Synopsis void trace_block_rq_remap(struct request_queue *q, struct request *rq, dev_t dev, sector_t from); Arguments q queue holding the operation rq block IO operation request dev device for the operation from original sector for the operation Description The block operation request rq in q has been remapped. The…
trace_block_rq_issue – issue pending block IO request operation to device driver Synopsis void trace_block_rq_issue(struct request_queue *q, struct request *rq); Arguments q queue holding operation rq block IO operation operation request Description Called when block operation request rq from queue q is sent to a device driver for processing. Authors Jason Baron <jbaron [at] redhat.com> Author….
trace_block_rq_insert – insert block operation request into queue Synopsis void trace_block_rq_insert(struct request_queue *q, struct request *rq); Arguments q target queue rq block IO operation request Description Called immediately before block operation request rq is inserted into queue q. The fields in the operation request rq struct can be examined to determine which device and sectors…
trace_block_rq_complete – block IO operation completed by device driver Synopsis void trace_block_rq_complete(struct request_queue *q, struct request *rq, unsigned int nr_bytes); Arguments q queue containing the block operation request rq block operations request nr_bytes number of completed bytes Description The block_rq_complete tracepoint event indicates that some portion of operation request has been completed by the device…