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tapset::irq(3stap) [debian man page]

TAPSET::IRQ(3stap)														TAPSET::IRQ(3stap)

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)

IBM
																TAPSET::IRQ(3stap)

Check Out this Related Man Page

REQUEST_THREADED_IRQ(9) 					Hardware Interfaces					   REQUEST_THREADED_IRQ(9)

NAME

       request_threaded_irq - allocate an interrupt line

SYNOPSIS

       int request_threaded_irq(unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, unsigned long irqflags, const char * devname,
				void * dev_id);

ARGUMENTS

       irq
	   Interrupt line to allocate

       handler
	   Function to be called when the IRQ occurs. Primary handler for threaded interrupts If NULL and thread_fn != NULL the default primary
	   handler is installed

       thread_fn
	   Function called from the irq handler thread If NULL, no irq thread is created

       irqflags
	   Interrupt type flags

       devname
	   An ascii name for the claiming device

       dev_id
	   A cookie passed back to the handler function

DESCRIPTION

       This call allocates interrupt resources and enables the interrupt line and IRQ handling. From the point this call is made your handler
       function may be invoked. Since your handler function must clear any interrupt the board raises, you must take care both to initialise your
       hardware and to set up the interrupt handler in the right order.

       If you want to set up a threaded irq handler for your device then you need to supply handler and thread_fn.  handler ist still called in
       hard interrupt context and has to check whether the interrupt originates from the device. If yes it needs to disable the interrupt on the
       device and return IRQ_WAKE_THREAD which will wake up the handler thread and run thread_fn. This split handler design is necessary to
       support shared interrupts.

       Dev_id must be globally unique. Normally the address of the device data structure is used as the cookie. Since the handler receives this
       value it makes sense to use it.

       If your interrupt is shared you must pass a non NULL dev_id as this is required when freeing the interrupt.

FLAGS

       IRQF_SHARED Interrupt is shared IRQF_DISABLED Disable local interrupts while processing IRQF_SAMPLE_RANDOM The interrupt can be used for
       entropy IRQF_TRIGGER_* Specify active edge(s) or level

COPYRIGHT

Kernel Hackers Manual 2.6.					     July 2010						   REQUEST_THREADED_IRQ(9)
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