Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
40 lines
829 B
Bash
Executable File
40 lines
829 B
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0+
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#
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# Get an estimate of how CPU-hoggy to be.
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#
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# Usage: cpus2use.sh
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#
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# Copyright (C) IBM Corporation, 2013
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#
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# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
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if test -n "$TORTURE_ALLOTED_CPUS"
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then
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echo $TORTURE_ALLOTED_CPUS
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exit 0
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fi
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ncpus=`grep '^processor' /proc/cpuinfo | wc -l`
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if mpstat -V > /dev/null 2>&1
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then
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idlecpus=`mpstat | tail -1 | \
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awk -v ncpus=$ncpus '{ print ncpus * ($7 + $NF) / 100 }'`
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else
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# No mpstat command, so use all available CPUs.
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idlecpus=$ncpus
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fi
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awk -v ncpus=$ncpus -v idlecpus=$idlecpus < /dev/null '
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BEGIN {
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cpus2use = idlecpus;
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if (cpus2use < 1)
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cpus2use = 1;
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if (cpus2use < ncpus / 10)
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cpus2use = ncpus / 10;
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if (cpus2use == int(cpus2use))
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cpus2use = int(cpus2use)
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else
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cpus2use = int(cpus2use) + 1
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print cpus2use;
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}'
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