NAME¶

tapset::irq - Systemtap probes for IRQ, workqueue,etc

DESCRIPTION¶

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

workqueue.create

probes creation of a new workqueue

 

Arguments:

 

wq_thread
task_struct of the workqueue thread.

 

cpu
cpu for which the worker thread is created.

 

workqueue.insert

probes queuing of work on a workqueue.

 

Arguments:

 

wq_thread
task_struct of the workqueue thread.

 

work
work_struct* being executed.

 

work_func
pointer to handler func.

 

workqueue.execute

probes execution of deferred work.

 

Arguments:

 

wq_thread
task_struct of the workqueue thread.

 

work
work_struct* being executed.

 

work_func
pointer to handler func.

 

workqueue.destroy

probes destruction of each worker thread of each cpu for a workqueue.

 

Arguments:

 

wq_thread
task_struct of the workqueue thread.

 

irq_handler.entry

Fires prior to execution of interrupt handler.

 

Arguments:

 

irq
irq number

 

action
struct irqaction* for this interrupt number

 

handler
interrupt handler function

 

flags
flags for this irq.

 

flags_str
A formatted string of flags.

 

dev_name
name of device

 

dev_id
cookie to identify device

 

next_irqaction
pointer to next irqaction for shared interrupts

 

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

 

thread_fn
interrupt handler function for threaded interrupts

 

thread
thread pointer for threaded interrupts

 

thread_flags
flags related to thread

 

irq_handler.exit

Fires post execution of interrupt handler.

 

Arguments:

 

irq
irq number

 

action
struct irqaction* for this interrupt number

 

ret
return value from interrupt handler that just executed.

 

handler
interrupt handler function

 

flags
flags for this irq.

 

flags_str
A formatted string of flags.

 

dev_name
name of device

 

dev_id
cookie to identify device

 

next_irqaction
pointer to next irqaction for shared interrupts

 

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

 

thread_fn
interrupt handler function for threaded interrupts

 

thread
thread pointer for threaded interrupts

 

thread_flags
flags related to thread

 

softirq.entry

triggered just before executing handler for a pending softirq

 

Arguments:

 

h
struct softirq* for current pending softirq.

 

vec
softirq_action vector

 

action
pointer to softirq handler just about to execute.

 

softirq.exit

triggered just after executing handler for a pending softirq

 

Arguments:

 

h
struct softirq* for just executed softirq.

 

vec
softirq_action vector

 

action
pointer to softirq handler that just finished execution.

 

SEE ALSO¶

stap(1), stapprobes(3stap)