[pm-qa] V2 : cpu hotplug test scenarii

Daniel Lezcano daniel.lezcano at linaro.org
Wed Sep 28 15:00:08 UTC 2011


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Changelog:
==========

V2:
 * fixed typo online -> offline spotted by Amit
 * added task migration check as suggested by Amit and David
 * added check of irq migration as suggested by David
 * added check /proc/cpuinfo, processor is back when online
 * added check /proc/interrupt is consistent

V1: initial post


Test : check the sysfs files are present
========================================

for each cpu
 * check /sys/devices/system/cpu/cpuX/online is there

What about the particular case for cpu0 where the 'online' file is there
but shouldn't as the other arch ?


Test : check cpu state is reflected in sysfs
============================================

for each cpu
 * set cpuX offline
 * check cpuX status is offline
 * set cpuX back online
 * check cpuX status is online

Test : check the affinity does not work on an offline cpu
=========================================================

for each cpu
 * set cpuX offline
 * check 'taskset -c X /bin/true' fails
 * set cpuX back online

Test : check task is migrated to another cpu
============================================

for each cpu
 * run a task on dedicated cpuX
 * set cpuX offline
 * check the task has been migrated to another cpu
 * kill the task
 * set cpuX back online

Test : check cpus are reflected on /proc/cpuinfo correctly
==========================================================

NRCPUS=<number of configured cpu on the system>

for each cpu
 * set cpuX offline
 * check /proc/cpuinfo 'processor' keyword count is 'NRCPUS - 1'
 * check the 'processor' keyword contains a cpu id different from the
cpu we offlined
 * set cpuX back online
 * check one of the 'processor' keyword contains cpuX

Test : check interrupts show the right configuration in /proc/interrupts
========================================================================

for each cpu
 * set cpuX offline
 * check cpuX is not present in /proc/interrupts
 * set cpuX back online
 * check cpuX is present in /proc/interrupts

Test : check interrupts are migrated
====================================

for each cpu
 * set cpuX irq affinity
 * set cpuX offline
 * check irq are migrated on another cpu
 * set cpuX back online

Test : test userspace notification
==================================

for each cpu
 * set cpuX offline
 * check from userspace notification has been done with the command
    'udevadm monitor --kernel --subsystem-match=cpu'
 * and the event is related to the cpuX and 'offline'
 * set the cpu online
 * check from userspace notification has been done with the command
    'udevadm monitor --kernel --subsystem-match=cpu'
 * and the event is related to the cpuX and 'online'

Test : do some stress test
===========================

for each cpu
 * for i in 1 .. 50
   * set cpuX offline
   * set cpuX back online

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