/usr/share/systemtap/tapset/irq.stp is in systemtap-common 1.6-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2009 IBM Corp.
* This file is part of systemtap, and is free software. You can
* redistribute it and/or modify it under the terms of the GNU General
* Public License (GPL); either version 2, or (at your option) any
* later version.
*
* Version 1.0 prerna@linux.vnet.ibm.com 2009-10-28
*
* Tracepoint based tapset for IRQs, Workqueues, etc
*
*/
// Probes for workqueues.
/**
* probe workqueue.create - Creating a new workqueue
* @wq_thread: task_struct of the workqueue thread
* @cpu: cpu for which the worker thread is created
*/
probe workqueue.create = kernel.trace("workqueue_creation") ?
{
wq_thread = $wq_thread
cpu = $cpu
}
/**
* probe workqueue.insert - Queuing work on a workqueue
* @wq_thread: task_struct of the workqueue thread
* @work: work_struct* being queued
* @work_func: pointer to handler function
*/
probe workqueue.insert = kernel.trace("workqueue_insertion") ?
{
wq_thread = $wq_thread
work = $work
work_func = $work->func
}
/**
* probe workqueue.execute - Executing deferred work
* @wq_thread: task_struct of the workqueue thread
* @work: work_struct* being executed
* @work_func: pointer to handler function
*/
probe workqueue.execute = kernel.trace("workqueue_execution") ?
{
wq_thread = $wq_thread
work = $work
work_func = $work->func
}
/**
* probe workqueue.destroy - Destroying workqueue
* @wq_thread: task_struct of the workqueue thread
*/
probe workqueue.destroy = kernel.trace("workqueue_destruction") ?
{
wq_thread = $wq_thread
}
// Probes for IRQ handlers.
/**
* probe irq_handler.entry - Execution of interrupt handler starting
* @irq: irq number
* @action: struct irqaction* for this interrupt num
* @handler: interrupt handler function
* @flags: Flags for IRQ handler
* @flags_str: symbolic string representation of IRQ 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
*/
probe irq_handler.entry = kernel.trace("irq_handler_entry") ?
{
irq = $irq
action = $action
handler = @cast($action,"irqaction","kernel<linux/interrupt.h>")->handler
flags = @cast($action,"irqaction","kernel<linux/interrupt.h>")->flags
flags_str = irqflags_str(flags)
dev_name = @cast($action,"irqaction","kernel<linux/interrupt.h>")->name
dev_id = @cast($action,"irqaction","kernel<linux/interrupt.h>")->dev_id
next_irqaction = @cast($action,"irqaction","kernel<linux/interrupt.h>")->next
dir = @cast($action,"irqaction","kernel<linux/interrupt.h>")->dir
thread_fn = @cast($action,"irqaction","kernel<linux/interrupt.h>")->thread_fn
thread = @cast($action,"irqaction","kernel<linux/interrupt.h>")->thread
thread_flags = @cast($action,"irqaction","kernel<linux/interrupt.h>")->thread_flags
}
/**
* probe irq_handler.exit - Execution of interrupt handler completed
* @irq: interrupt number
* @action: struct irqaction*
* @ret: return value of the handler
* @handler: interrupt handler function that was executed
* @flags: flags for IRQ handler
* @flags_str: symbolic string representation of IRQ 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
*/
probe irq_handler.exit = kernel.trace("irq_handler_exit") ?
{
irq = $irq
action = $action
ret = $ret
handler = @cast($action,"irqaction","kernel<linux/interrupt.h>")->handler
flags = @cast($action,"irqaction","kernel<linux/interrupt.h>")->flags
flags_str = irqflags_str(flags)
dev_name = @cast($action,"irqaction","kernel<linux/interrupt.h>")->name
dev_id = @cast($action,"irqaction","kernel<linux/interrupt.h>")->dev_id
next_irqaction = @cast($action,"irqaction","kernel<linux/interrupt.h>")->next
dir = @cast($action,"irqaction","kernel<linux/interrupt.h>")->dir
thread_fn = @cast($action,"irqaction","kernel<linux/interrupt.h>")->thread_fn
thread = @cast($action,"irqaction","kernel<linux/interrupt.h>")->thread
thread_flags = @cast($action,"irqaction","kernel<linux/interrupt.h>")->thread_flags
}
// Softirq based probes.
/**
* probe softirq.entry - Execution of handler for a pending softirq starting
* @h: struct softirq_action* for current pending softirq
* @vec: softirq_action vector
* @action: pointer to softirq handler just about to execute
* @vec_nr: softirq vector number
*/
probe softirq.entry = kernel.trace("irq_softirq_entry") !,
kernel.trace("softirq_entry") ?
{
# kernels < 2.6.37
h = (@defined($h) ? $h : 0)
vec = (@defined($vec) ? $vec : 0)
action = (@defined($h) ? @cast($h,"softirq_action","kernel<linux/interrupt.h>")->action : 0)
# kernels >= 2.6.37
vec_nr = (@defined($vec_nr) ? $vec_nr : 0)
}
/**
* probe softirq.exit - Execution of handler for a pending softirq completed
* @h: struct softirq_action* for just executed softirq
* @vec: softirq_action vector
* @action: pointer to softirq handler that just finished execution
* @vec_nr: softirq vector number
*/
probe softirq.exit = kernel.trace("irq_softirq_exit") !,
kernel.trace("softirq_exit") ?
{
# kernels < 2.6.37
h = (@defined($h) ? $h : 0)
vec = (@defined($vec) ? $vec : 0)
action = (@defined($h) ? @cast($h,"softirq_action","kernel<linux/interrupt.h>")->action : 0)
# kernels >= 2.6.37
vec_nr = (@defined($vec_nr) ? $vec_nr : 0)
}
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