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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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