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authorPaul E. McKenney <paulmck@kernel.org>2021-07-08 11:02:14 -0700
committerPaul E. McKenney <paulmck@kernel.org>2021-07-27 11:41:32 -0700
commit4567c76a8e45af6b5015b17ea1d1a62af1257cc4 (patch)
tree2febf31b95a7adc4b2f0251d34e5d10c6ad913ba /tools/testing/selftests/rcutorture/bin
parentrcutorture: Upgrade two-CPU scenarios to four CPUs (diff)
downloadlinux-dev-4567c76a8e45af6b5015b17ea1d1a62af1257cc4.tar.xz
linux-dev-4567c76a8e45af6b5015b17ea1d1a62af1257cc4.zip
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: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'tools/testing/selftests/rcutorture/bin')
-rwxr-xr-xtools/testing/selftests/rcutorture/bin/jitter.sh10
1 files changed, 3 insertions, 7 deletions
diff --git a/tools/testing/selftests/rcutorture/bin/jitter.sh b/tools/testing/selftests/rcutorture/bin/jitter.sh
index 15d937ba96ca..fd1ffaa5a135 100755
--- a/tools/testing/selftests/rcutorture/bin/jitter.sh
+++ b/tools/testing/selftests/rcutorture/bin/jitter.sh
@@ -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