On 09/14/2012 05:55 PM, Peter Zijlstra wrote: > On Fri, 2012-09-14 at 17:48 +0530, Srivatsa S. Bhat wrote: >> #! /bin/bash > > CPUPATH="/sys/devices/system/cpu" > >> NUMBER_OF_CPUS=`ls -d /sys/devices/system/cpu/cpu[0-9]* | wc -l` > > apply the above > >> cd /sys/devices/system/cpu > > skip this, so running the script doesn't change PWD > >> while [ 1 ] > > while :; > >> do >> for ((i=1; i < NUMBER_OF_CPUS; i++)) >> do >> sleep 1; > > Also play with shorter sleeps like: sleep .1, I've found that higher > hotplug rate triggers some races faster. > >> state=`cat cpu$i/online` >> if [ $state -eq 0 ] >> then >> echo 1 > cpu$i/online >> else >> echo 0 > cpu$i/online > > echo $((state^1)) > $CPUPATH/cpu$i/online > >> fi >> done >> done > >
Thanks a lot Peter for your suggestions! Fengguang, like I had mentioned some time before, somebody had pointed me to a hotplug test-suite that I believe is being used in LTP. I have a copy of that suite, which I have attached with this mail. I have never actually used it seriously before (because I could trigger bugs with my simple script!), so I don't exactly know what state it is in ;-) Regards, Srivatsa S. Bhat
lhcs_regression-1.6.tgz
Description: application/compressed-tar
