.\" -*- nroff -*-
.TH TAPSET::IRQ 3stap "" "IBM"
.SH NAME
tapset::irq \- Systemtap probes for IRQ, workqueue,etc

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.SH DESCRIPTION

Probe points for probing irq handler execution, softirqs, workqueues,etc

.P
.TP
.B workqueue.create
probes creation of a new workqueue

.B Arguments:

.I wq_thread
   task_struct of the workqueue thread.

.I cpu
   cpu for which the worker thread is created.

.P
.TP
.B workqueue.insert
probes queuing of work on a workqueue.

.B Arguments:

.I wq_thread
   task_struct of the workqueue thread.

.I work
   work_struct* being executed.

.I work_func
   pointer to handler func.

.P
.TP
.B workqueue.execute
probes execution of deferred work.

.B Arguments:

.I wq_thread
   task_struct of the workqueue thread.

.I work
   work_struct* being executed.

.I work_func
   pointer to handler func.

.P
.TP
.B workqueue.destroy
probes destruction of each worker thread of each cpu for a workqueue.

.B Arguments:

.I wq_thread
  task_struct of the workqueue thread.

.P
.TP
.B irq_handler.entry
Fires prior to execution of interrupt handler.

.B Arguments:

.I irq
   irq number

.I action
   struct irqaction* for this interrupt number

.I handler
   interrupt handler function

.I flags
   flags for this irq.

.I flags_str
   A formatted string of flags.

.I dev_name
   name of device

.I dev_id
   cookie to identify device

.I next_irqaction
   pointer to next irqaction for shared interrupts

.I dir
   pointer to the /proc/irq/NN/name entry

.I thread_fn
   interrupt handler function for threaded interrupts

.I thread
   thread pointer for threaded interrupts

.I thread_flags
   flags related to thread

.P
.TP
.B irq_handler.exit
Fires post execution of interrupt handler.

.B Arguments:

.I irq
   irq number

.I action
   struct irqaction* for this interrupt number

.I ret
   return value from interrupt handler that just executed.

.I handler
   interrupt handler function

.I flags
   flags for this irq.

.I flags_str
   A formatted string of flags.

.I dev_name
   name of device

.I dev_id
   cookie to identify device

.I next_irqaction
   pointer to next irqaction for shared interrupts

.I dir
   pointer to the /proc/irq/NN/name entry

.I thread_fn
   interrupt handler function for threaded interrupts

.I thread
   thread pointer for threaded interrupts

.I thread_flags
   flags related to thread

.P
.TP
.B softirq.entry
triggered just before executing handler for a pending softirq

.B Arguments:

.I h
   struct softirq* for current pending softirq.

.I vec
   softirq_action vector

.I action
   pointer to softirq handler just about to execute.

.P
.TP
.B softirq.exit
triggered just after executing handler for a pending softirq

.B Arguments:

.I h
   struct softirq* for just executed softirq.

.I vec
   softirq_action vector

.I action
   pointer to softirq handler that just finished execution.

.SH SEE ALSO
.IR stap (1),
.IR stapprobes (3stap)