Commit 6387ecbc authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

torture: Add a stop-run capability 



When bisecting RCU issues, it is often the case that the first error in
an unsuccessful run will happen quickly, but that a successful run must
go on for some time in order to obtain a sufficiently low false-negative
error rate.  In many cases, a bisection requires multiple concurrent
runs, in which case the first failure in any run indicates failure,
pure and simple.  In such cases, it would speed things up greatly if
the first failure terminated all runs.

This commit therefore adds scripting that checks for a file named "STOP"
in the top-level results directory, terminating the run when it appears.
Note that in-progress builds will continue until completion, but future
builds and all runs will be cut short.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 3e93a51f

tools/testing/selftests/rcutorture/bin/jitter.sh

+6 −0
Original line number Diff line number Diff line
@@ -46,6 +46,12 @@ do 
		exit 0;

	fi



	# Check for stop request.

	if test -f "$TORTURE_STOPFILE"

	then

		exit 1;

	fi



	# Set affinity to randomly selected online CPU

	if cpus=`grep 1 /sys/devices/system/cpu/*/online 2>&1 |

		 sed -e 's,/[^/]*$,,' -e 's/^[^0-9]*//'`

tools/testing/selftests/rcutorture/bin/kvm-build.sh

+6 −0
Original line number Diff line number Diff line
@@ -9,6 +9,12 @@ 
#

# Authors: Paul E. McKenney <paulmck@linux.ibm.com>



if test -f "$TORTURE_STOPFILE"

then

	echo "kvm-build.sh early exit due to run STOP request"

	exit 1

fi



config_template=${1}

if test -z "$config_template" -o ! -f "$config_template" -o ! -r "$config_template"

then

tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh

+11 −2
Original line number Diff line number Diff line
@@ -182,7 +182,7 @@ do 
	kruntime=`gawk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`

	if test -z "$qemu_pid" || kill -0 "$qemu_pid" > /dev/null 2>&1

	then

		if test $kruntime -ge $seconds

		if test $kruntime -ge $seconds -o -f "$TORTURE_STOPFILE"

		then

			break;

		fi
@@ -210,11 +210,20 @@ then 
	qemu_pid=`cat "$resdir/qemu_pid"`

fi

if test $commandcompleted -eq 0 -a -n "$qemu_pid"

then

	if ! test -f "$TORTURE_STOPFILE"

	then

		echo Grace period for qemu job at pid $qemu_pid

	fi

	oldline="`tail $resdir/console.log`"

	while :

	do

		if test -f "$TORTURE_STOPFILE"

		then

			echo "PID $qemu_pid killed due to run STOP request" >> $resdir/Warnings 2>&1

			kill -KILL $qemu_pid

			break

		fi

		kruntime=`gawk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`

		if kill -0 $qemu_pid > /dev/null 2>&1

		then

tools/testing/selftests/rcutorture/bin/kvm.sh

+2 −0
Original line number Diff line number Diff line
@@ -337,6 +337,8 @@ then 
	mkdir -p "$resdir" || :

fi

mkdir $resdir/$ds

TORTURE_RESDIR="$resdir/$ds"; export TORTURE_RESDIR

TORTURE_STOPFILE="$resdir/$ds/STOP"; export TORTURE_STOPFILE

echo Results directory: $resdir/$ds

echo $scriptname $args

touch $resdir/$ds/log

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