--- /dev/null
+#!/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
--- /dev/null
+#!/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 ${jittering_dir}/jittering
+wait
print "if test -n \"$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"