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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/rcutorture/bin/cpus2use.sh | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/rcutorture/bin/cpus2use.sh')
-rwxr-xr-x | tools/testing/selftests/rcutorture/bin/cpus2use.sh | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tools/testing/selftests/rcutorture/bin/cpus2use.sh b/tools/testing/selftests/rcutorture/bin/cpus2use.sh new file mode 100755 index 000000000..1dbfb6256 --- /dev/null +++ b/tools/testing/selftests/rcutorture/bin/cpus2use.sh @@ -0,0 +1,40 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0+ +# +# Get an estimate of how CPU-hoggy to be. +# +# Usage: cpus2use.sh +# +# Copyright (C) IBM Corporation, 2013 +# +# Authors: Paul E. McKenney <paulmck@linux.ibm.com> + +if test -n "$TORTURE_ALLOTED_CPUS" +then + echo $TORTURE_ALLOTED_CPUS + exit 0 +fi +ncpus=`grep '^processor' /proc/cpuinfo | wc -l` +if mpstat -V > /dev/null 2>&1 +then + idlecpus=`mpstat | tail -1 | \ + awk -v ncpus=$ncpus '{ print ncpus * ($7 + $NF) / 100 }'` +else + # No mpstat command, so use all available CPUs. + echo The mpstat command is not available, so greedily using all CPUs. + idlecpus=$ncpus +fi +awk -v ncpus=$ncpus -v idlecpus=$idlecpus < /dev/null ' +BEGIN { + cpus2use = idlecpus; + if (cpus2use < 1) + cpus2use = 1; + if (cpus2use < ncpus / 10) + cpus2use = ncpus / 10; + if (cpus2use == int(cpus2use)) + cpus2use = int(cpus2use) + else + cpus2use = int(cpus2use) + 1 + print cpus2use; +}' + |