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torture: Use numeric taskset argument in jitter.sh

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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: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2021-07-08 11:02:14 -07:00
parent de2909461c
commit 4567c76a8e
1 changed files with 3 additions and 7 deletions
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10
tools/testing/selftests/rcutorture/bin/jitter.sh
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@ -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