On Fri, Sep 14, 2012 at 02:25:19PM +0200, 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
Yes, that's good practice. > > while [ 1 ] > > while :; I used to use 'true', but ':' looks cool! > > 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. OK. > > 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 Good! Thanks, Fengguang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
