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torture: Abstract jitter.sh start/stop into scripts

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This commit creates jitterstart.sh and jitterstop.sh scripts that handle
the starting and stopping of the jitter.sh scripts.  These must be sourced
using the bash "." command to allow the generated script to wait on the
backgrounded jitter.sh scripts.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2021-02-11 12:37:46 -08:00
parent 4cd54518c3
commit 040accb3cd
3 changed files with 62 additions and 5 deletions
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37
tools/testing/selftests/rcutorture/bin/jitterstart.sh Normal file
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@ -0,0 +1,37 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0+
#
# Start up the specified number of jitter.sh scripts in the background.
#
# Usage: . jitterstart.sh n jittering-dir duration [ sleepmax [ spinmax ] ]
#
# n: Number of jitter.sh scripts to start up.
# jittering-dir: Directory in which to put "jittering" file.
# duration: Time to run in seconds.
# sleepmax: Maximum microseconds to sleep, defaults to one second.
# spinmax: Maximum microseconds to spin, defaults to one millisecond.
#
# Copyright (C) 2021 Facebook, Inc.
#
# Authors: Paul E. McKenney <paulmck@kernel.org>
jitter_n=$1
if test -z "$jitter_n"
then
echo jitterstart.sh: Missing count of jitter.sh scripts to start.
exit 33
fi
jittering_dir=$2
if test -z "$jittering_dir"
then
echo jitterstart.sh: Missing directory in which to place jittering file.
exit 34
fi
shift
shift
touch ${jittering_dir}/jittering
for ((jitter_i = 1; jitter_i <= $jitter_n; jitter_i++))
do
jitter.sh $jitter_i "${jittering_dir}/jittering" "$@" &
done

23
tools/testing/selftests/rcutorture/bin/jitterstop.sh Normal file
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@ -0,0 +1,23 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0+
#
# Remove the "jittering" file, signaling the jitter.sh scripts to stop,
# then wait for them to terminate.
#
# Usage: . jitterstop.sh jittering-dir
#
# jittering-dir: Directory containing "jittering" file.
#
# Copyright (C) 2021 Facebook, Inc.
#
# Authors: Paul E. McKenney <paulmck@kernel.org>
jittering_dir=$1
if test -z "$jittering_dir"
then
echo jitterstop.sh: Missing directory in which to place jittering file.
exit 34
fi
rm -f ${jittering_dir}/jittering
wait

7
tools/testing/selftests/rcutorture/bin/kvm.sh
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@ -502,15 +502,12 @@ function dump(first, pastlast, batchnum)
print "if test -n \"$needqemurun\""
print "then"
print "\techo ---- Starting kernels. `date` | tee -a " rd "log";
print "\ttouch " rd "jittering"
for (j = 0; j < njitter; j++)
print "\tjitter.sh " j " " rd "jittering " dur " " ja[2] " " ja[3] "&"
print "\t. jitterstart.sh " njitter " " rd " " dur " " ja[2] " " ja[3]
print "\twhile ls $runfiles > /dev/null 2>&1"
print "\tdo"
print "\t\t:"
print "\tdone"
print "\trm -f " rd "jittering"
print "\twait"
print "\t. jitterstop.sh " rd
print "\techo ---- All kernel runs complete. `date` | tee -a " rd "log";
print "else"
print "\twait"