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torture: Use elapsed time to detect hangs

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The kvm-test-1-run.sh currently counts "sleep 1" commands to detect
hangs.  This can fail spectacularly on busy systems, where "sleep 1"
might take far longer than one second to complete.  This commit
therefore changes hang detection to use elapsed time measurements.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
Paul E. McKenney 2014-03-18 10:34:18 -07:00
parent d0d0606e2c
commit 0bca7c33ba
1 changed files with 12 additions and 6 deletions
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18
tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
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@ -167,14 +167,18 @@ fi
qemu_pid=$!
commandcompleted=0
echo Monitoring qemu job at pid $qemu_pid
for ((i=0;i<$seconds;i++))
while :
do
kruntime=`awk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`
if kill -0 $qemu_pid > /dev/null 2>&1
then
if test $kruntime -ge $seconds
then
break;
fi
sleep 1
else
commandcompleted=1
kruntime=`awk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`
if test $kruntime -lt $seconds
then
echo Completed in $kruntime vs. $seconds >> $resdir/Warnings 2>&1
@ -194,20 +198,22 @@ done
if test $commandcompleted -eq 0
then
echo Grace period for qemu job at pid $qemu_pid
for ((i=0;i<=$grace;i++))
while :
do
kruntime=`awk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`
if kill -0 $qemu_pid > /dev/null 2>&1
then
sleep 1
:
else
break
fi
if test $i -eq $grace
if test $kruntime -ge $((seconds + grace))
then
kruntime=`awk 'BEGIN { print systime() - '"$kstarttime"' }'`
echo "!!! Hang at $kruntime vs. $seconds seconds" >> $resdir/Warnings 2>&1
kill -KILL $qemu_pid
break
fi
sleep 1
done
fi