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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>Delaying, scheduling, and timer routines</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Device Drivers" /><link rel="up" href="ch01.html" title="Chapter 1. Driver Basics" /><link rel="prev" href="re28.html" title="/builddir/build/BUILD/kernel-2.6.32-71.14.1.el6/linux-2.6.32-71.14.1.el6.noarch//arch/x86/include/asm/unaligned.h" /><link rel="next" href="re29.html" title="struct task_cputime" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Delaying, scheduling, and timer routines</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re28.html">Prev</a> </td><th width="60%" align="center">Chapter 1. Driver Basics</th><td width="20%" align="right"> <a accesskey="n" href="re29.html">Next</a></td></tr></table><hr /></div><div class="sect1" title="Delaying, scheduling, and timer routines"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="id2597599"></a>Delaying, scheduling, and timer routines</h2></div></div></div><div class="toc"><dl><dt><span class="refentrytitle"><a href="re29.html"><span>struct task_cputime</span></a></span><span class="refpurpose"> —
collected CPU time counts
</span></dt><dt><span class="refentrytitle"><a href="re30.html"><span>struct thread_group_cputimer</span></a></span><span class="refpurpose"> —
thread group interval timer counts
</span></dt><dt><span class="refentrytitle"><a href="re31.html"><span>pid_alive</span></a></span><span class="refpurpose"> —
check that a task structure is not stale
</span></dt><dt><span class="refentrytitle"><a href="re32.html"><span>is_global_init</span></a></span><span class="refpurpose"> —
check if a task structure is init
</span></dt><dt><span class="refentrytitle"><a href="re33.html"><span>kthread_bind</span></a></span><span class="refpurpose"> —
bind a just-created kthread to a cpu.
</span></dt><dt><span class="refentrytitle"><a href="re34.html"><span>wake_up_process</span></a></span><span class="refpurpose"> —
Wake up a specific process
</span></dt><dt><span class="refentrytitle"><a href="re35.html"><span>preempt_notifier_register</span></a></span><span class="refpurpose"> —
tell me when current is being preempted & rescheduled
</span></dt><dt><span class="refentrytitle"><a href="re36.html"><span>preempt_notifier_unregister</span></a></span><span class="refpurpose"> —
no longer interested in preemption notifications
</span></dt><dt><span class="refentrytitle"><a href="re37.html"><span>__wake_up</span></a></span><span class="refpurpose"> —
wake up threads blocked on a waitqueue.
</span></dt><dt><span class="refentrytitle"><a href="re38.html"><span>__wake_up_sync_key</span></a></span><span class="refpurpose"> —
wake up threads blocked on a waitqueue.
</span></dt><dt><span class="refentrytitle"><a href="re39.html"><span>complete</span></a></span><span class="refpurpose"> —
signals a single thread waiting on this completion
</span></dt><dt><span class="refentrytitle"><a href="re40.html"><span>complete_all</span></a></span><span class="refpurpose"> —
signals all threads waiting on this completion
</span></dt><dt><span class="refentrytitle"><a href="re41.html"><span>wait_for_completion</span></a></span><span class="refpurpose"> —
waits for completion of a task
</span></dt><dt><span class="refentrytitle"><a href="re42.html"><span>wait_for_completion_timeout</span></a></span><span class="refpurpose"> —
waits for completion of a task (w/timeout)
</span></dt><dt><span class="refentrytitle"><a href="re43.html"><span>wait_for_completion_interruptible</span></a></span><span class="refpurpose"> —
waits for completion of a task (w/intr)
</span></dt><dt><span class="refentrytitle"><a href="re44.html"><span>wait_for_completion_interruptible_timeout</span></a></span><span class="refpurpose"> —
waits for completion (w/(to,intr))
</span></dt><dt><span class="refentrytitle"><a href="re45.html"><span>wait_for_completion_killable</span></a></span><span class="refpurpose"> —
waits for completion of a task (killable)
</span></dt><dt><span class="refentrytitle"><a href="re46.html"><span>try_wait_for_completion</span></a></span><span class="refpurpose"> —
try to decrement a completion without blocking
</span></dt><dt><span class="refentrytitle"><a href="re47.html"><span>completion_done</span></a></span><span class="refpurpose"> —
Test to see if a completion has any waiters
</span></dt><dt><span class="refentrytitle"><a href="re48.html"><span>task_nice</span></a></span><span class="refpurpose"> —
return the nice value of a given task.
</span></dt><dt><span class="refentrytitle"><a href="re49.html"><span>sched_setscheduler</span></a></span><span class="refpurpose"> —
change the scheduling policy and/or RT priority of a thread.
</span></dt><dt><span class="refentrytitle"><a href="re50.html"><span>yield</span></a></span><span class="refpurpose"> —
yield the current processor to other threads.
</span></dt><dt><span class="refentrytitle"><a href="re51.html"><span>__round_jiffies</span></a></span><span class="refpurpose"> —
function to round jiffies to a full second
</span></dt><dt><span class="refentrytitle"><a href="re52.html"><span>__round_jiffies_relative</span></a></span><span class="refpurpose"> —
function to round jiffies to a full second
</span></dt><dt><span class="refentrytitle"><a href="re53.html"><span>round_jiffies</span></a></span><span class="refpurpose"> —
function to round jiffies to a full second
</span></dt><dt><span class="refentrytitle"><a href="re54.html"><span>round_jiffies_relative</span></a></span><span class="refpurpose"> —
function to round jiffies to a full second
</span></dt><dt><span class="refentrytitle"><a href="re55.html"><span>__round_jiffies_up</span></a></span><span class="refpurpose"> —
function to round jiffies up to a full second
</span></dt><dt><span class="refentrytitle"><a href="re56.html"><span>__round_jiffies_up_relative</span></a></span><span class="refpurpose"> —
function to round jiffies up to a full second
</span></dt><dt><span class="refentrytitle"><a href="re57.html"><span>round_jiffies_up</span></a></span><span class="refpurpose"> —
function to round jiffies up to a full second
</span></dt><dt><span class="refentrytitle"><a href="re58.html"><span>round_jiffies_up_relative</span></a></span><span class="refpurpose"> —
function to round jiffies up to a full second
</span></dt><dt><span class="refentrytitle"><a href="re59.html"><span>init_timer_key</span></a></span><span class="refpurpose"> —
initialize a timer
</span></dt><dt><span class="refentrytitle"><a href="re60.html"><span>mod_timer_pending</span></a></span><span class="refpurpose"> —
modify a pending timer's timeout
</span></dt><dt><span class="refentrytitle"><a href="re61.html"><span>mod_timer</span></a></span><span class="refpurpose"> —
modify a timer's timeout
</span></dt><dt><span class="refentrytitle"><a href="re62.html"><span>mod_timer_pinned</span></a></span><span class="refpurpose"> —
modify a timer's timeout
</span></dt><dt><span class="refentrytitle"><a href="re63.html"><span>add_timer</span></a></span><span class="refpurpose"> —
start a timer
</span></dt><dt><span class="refentrytitle"><a href="re64.html"><span>add_timer_on</span></a></span><span class="refpurpose"> —
start a timer on a particular CPU
</span></dt><dt><span class="refentrytitle"><a href="re65.html"><span>del_timer</span></a></span><span class="refpurpose"> —
deactive a timer.
</span></dt><dt><span class="refentrytitle"><a href="re66.html"><span>try_to_del_timer_sync</span></a></span><span class="refpurpose"> —
Try to deactivate a timer
</span></dt><dt><span class="refentrytitle"><a href="re67.html"><span>del_timer_sync</span></a></span><span class="refpurpose"> —
deactivate a timer and wait for the handler to finish.
</span></dt><dt><span class="refentrytitle"><a href="re68.html"><span>schedule_timeout</span></a></span><span class="refpurpose"> —
sleep until timeout
</span></dt><dt><span class="refentrytitle"><a href="re69.html"><span>msleep</span></a></span><span class="refpurpose"> —
sleep safely even with waitqueue interruptions
</span></dt><dt><span class="refentrytitle"><a href="re70.html"><span>msleep_interruptible</span></a></span><span class="refpurpose"> —
sleep waiting for signals
</span></dt></dl></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re28.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch01.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re29.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">
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