Commit 4567c76a authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

torture: Use numeric taskset argument in jitter.sh 



The jitter.sh script has some entertaining awk code to generate a
hex mask from a randomly selected CPU number, which is handed to the
"taskset" command.  Except that this command has a "-c" parameter to
take a comma/dash-separated list of CPU numbers.  This commit therefore
saves a few lines of awk by switching to a single-number CPU list.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent de290946

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

+3 −7
Original line number Diff line number Diff line
@@ -68,16 +68,12 @@ do 
	cpumask=`awk -v cpus="$cpus" -v me=$me -v n=$n 'BEGIN {

		srand(n + me + systime());

		ncpus = split(cpus, ca);

		curcpu = ca[int(rand() * ncpus + 1)];

		z = "";

		for (i = 1; 4 * i <= curcpu; i++)

			z = z "0";

		print "0x" 2 ^ (curcpu % 4) z;

		print ca[int(rand() * ncpus + 1)];

	}' < /dev/null`

	n=$(($n+1))

	if ! taskset -p $cpumask $$ > /dev/null 2>&1

	if ! taskset -c -p $cpumask $$ > /dev/null 2>&1

	then

		echo taskset failure: '"taskset -p ' $cpumask $$ '"'

		echo taskset failure: '"taskset -c -p ' $cpumask $$ '"'

		exit 1

	fi