From 43e38ab3d518352932951bacb99705a3bee9477c Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Date: Wed, 15 Jan 2014 15:48:41 -0800
Subject: [PATCH] rcutorture: Enable concurrent rcutorture runs
The rcutorture tests run by default range from using one CPU to using
sixteen of them. Therefore, rcutorture testing could be sped up
significantly simply by running the kernels in parallel. Building
them in parallel is not all that helpful: "make -j" is usually a
better bet. So this commit takes a new "--cpus" argument that
specifies how many CPUs rcutorture is permitted to use for its
parallel runs. The default of zero does sequential runs as before.
The bin-packing is minimal, and will be grossly suboptimal for
some configurations. However, powers of two work reasonably well.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
---
.../selftests/rcutorture/bin/functions.sh | 1 +
.../selftests/rcutorture/bin/kvm-recheck.sh | 4 +-
.../rcutorture/bin/kvm-test-1-rcu.sh | 2 +-
tools/testing/selftests/rcutorture/bin/kvm.sh | 125 +++++++++++++++---
4 files changed, 108 insertions(+), 24 deletions(-)
diff --git a/tools/testing/selftests/rcutorture/bin/functions.sh b/tools/testing/selftests/rcutorture/bin/functions.sh
index 587561d7c035a..9b17e810ddc39 100644
--- a/tools/testing/selftests/rcutorture/bin/functions.sh
+++ b/tools/testing/selftests/rcutorture/bin/functions.sh
@@ -96,6 +96,7 @@ identify_qemu () {
echo qemu-system-ppc64
else
echo Cannot figure out what qemu command to use! 1>&2
+ echo file $1 output: $u
# Usually this will be one of /usr/bin/qemu-system-*
# Use RCU_QEMU_CMD environment variable or appropriate
# argument to top-level script.
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh
index eb2850935c265..89b5dbac53272 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh
@@ -31,9 +31,9 @@ do
dirs=`find $rd -name Make.defconfig.out -print | sort | sed -e 's,/[^/]*$,,' | sort -u`
for i in $dirs
do
- if test $firsttime
+ if test -n "$firsttime"
then
- firsttime=0
+ firsttime=""
resdir=`echo $i | sed -e 's,/$,,' -e 's,/[^/]*$,,'`
head -1 $resdir/log
fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-test-1-rcu.sh b/tools/testing/selftests/rcutorture/bin/kvm-test-1-rcu.sh
index a06a0a6ce5ac2..1b9555b2b0d73 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-test-1-rcu.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-test-1-rcu.sh
@@ -123,7 +123,7 @@ kstarttime=`awk 'BEGIN { print systime() }' < /dev/null`
echo ' ---' `date`: Starting kernel
# Determine the appropriate flavor of qemu command.
-QEMU="`identify_qemu $builddir/vmlinux.o`"
+QEMU="`identify_qemu $builddir/vmlinux`"
# Generate -smp qemu argument.
qemu_args="-nographic $qemu_args"
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index f2113493bbfc8..f74f00628afed 100644
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -30,6 +30,10 @@
scriptname=$0
args="$*"
+T=/tmp/kvm.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
dur=30
KVM="`pwd`/tools/testing/selftests/rcutorture"; export KVM
PATH=${KVM}/bin:$PATH; export PATH
@@ -38,6 +42,7 @@ RCU_INITRD="$KVM/initrd"; export RCU_INITRD
RCU_KMAKE_ARG=""; export RCU_KMAKE_ARG
resdir=""
configs=""
+cpus=0
ds=`date +%Y.%m.%d-%H:%M:%S`
kversion=""
@@ -49,6 +54,7 @@ usage () {
echo " --builddir absolute-pathname"
echo " --buildonly"
echo " --configs \"config-file list\""
+ echo " --cpus N"
echo " --datestamp string"
echo " --duration minutes"
echo " --interactive"
@@ -85,6 +91,11 @@ do
configs="$2"
shift
;;
+ --cpus)
+ checkarg --cpus "(number)" "$#" "$2" '^[0-9]*$' '^--'
+ cpus=$2
+ shift
+ ;;
--datestamp)
checkarg --datestamp "(relative pathname)" "$#" "$2" '^[^/]*$' '^--'
ds=$2
@@ -168,6 +179,7 @@ else
fi
fi
mkdir $resdir/$ds
+echo Results directory: $resdir/$ds
touch $resdir/$ds/log
echo $scriptname $args
echo $scriptname $args >> $resdir/$ds/log
@@ -178,33 +190,104 @@ then
git status >> $resdir/$ds/testid.txt
git rev-parse HEAD >> $resdir/$ds/testid.txt
fi
-builddir=$KVM/b1
-if ! test -e $builddir
-then
- mkdir $builddir || :
-fi
+touch $T/cfgcpu
for CF in $configs
do
- # Running TREE01 multiple times creates TREE01, TREE01.2, TREE01.3, ...
- rd=$resdir/$ds/$CF
- if test -d "${rd}"
+ if test -f "$CONFIGFRAG/$kversion/$CF"
then
- n="`ls -d "${rd}"* | grep '\.[0-9]\+$' |
- sed -e 's/^.*\.\([0-9]\+\)/\1/' |
- sort -k1n | tail -1`"
- if test -z "$n"
- then
- rd="${rd}.2"
- else
- n="`expr $n + 1`"
- rd="${rd}.${n}"
- fi
+ echo $CF `configNR_CPUS.sh $CONFIGFRAG/$kversion/$CF` >> $T/cfgcpu
+ else
+ echo "The --configs file $CF does not exist, terminating."
+ exit 1
fi
- mkdir "${rd}"
- echo Results directory: $rd
- kvm-test-1-rcu.sh $CONFIGFRAG/$kversion/$CF $builddir $rd $dur "$RCU_QEMU_ARG" "$RCU_BOOTARGS"
done
+sort -k2nr $T/cfgcpu > $T/cfgcpu.sort
+
+awk < $T/cfgcpu.sort \
+ -v CONFIGDIR="$CONFIGFRAG/$kversion/" \
+ -v KVM="$KVM" \
+ -v ncpus=$cpus \
+ -v rd=$resdir/$ds/ \
+ -v dur=$dur \
+ -v RCU_QEMU_ARG=$RCU_QEMU_ARG \
+ -v RCU_BOOTARGS=$RCU_BOOTARGS \
+'BEGIN {
+ i = 0;
+}
+
+{
+ cf[i] = $1;
+ cpus[i] = $2;
+ i++;
+}
+
+function dump(first, pastlast)
+{
+ print "echo ----start batch----"
+ jn=1
+ for (j = first; j < pastlast; j++) {
+ builddir=KVM "/b" jn
+ print "echo ", cf[j], cpus[j] ": Starting build."
+ print "rm -f " builddir ".*"
+ print "touch " builddir ".wait"
+ print "mkdir " builddir " || :"
+ if (cfrep[cf[j]] == "") {
+ cfr[j] = cf[j];
+ cfrep[cf[j]] = 1;
+ } else {
+ cfrep[cf[j]]++;
+ cfr[j] = cf[j] "." cfrep[cf[j]];
+ }
+ print "mkdir " rd cfr[j] " || :";
+ print "kvm-test-1-rcu.sh " CONFIGDIR cf[j], builddir, rd cfr[j], dur " \"" RCU_QEMU_ARG "\" \"" RCU_BOOTARGS "\" > " builddir ".out 2>&1 &"
+ print "echo ", cf[j], cpus[j] ": Waiting for build to complete."
+ print "while test -f " builddir ".wait"
+ print "do"
+ print "\tsleep 1"
+ print "done"
+ print "echo ", cf[j], cpus[j] ": Build complete."
+ jn++;
+ }
+ k = first
+ for (j = 1; j < jn; j++) {
+ builddir=KVM "/b" j
+ print "rm -f " builddir ".ready"
+ print "echo ----", cf[k], cpus[k] ": Starting kernel"
+ k++;
+ }
+ print "wait"
+ print "echo ---- All kernel runs complete"
+ k = first
+ for (j = 1; j < jn; j++) {
+ builddir=KVM "/b" j
+ print "echo ----", cf[k], cpus[k] ": Build/run results:"
+ print "cat " builddir ".out"
+ k++;
+ }
+}
+
+END {
+ njobs = i;
+ nc = ncpus;
+ first = 0;
+ for (i = 0; i < njobs; i++) {
+ if (ncpus == 0) {
+ dump(i, i + 1);
+ first = i;
+ } else if (nc < cpus[i] && i != 0) {
+ dump(first, i);
+ first = i;
+ nc = ncpus;
+ }
+ nc -= cpus[i];
+ }
+ if (ncpus != 0)
+ dump(first, i);
+}' > $T/script
+
+sh $T/script
+
# Tracing: trace_event=rcu:rcu_grace_period,rcu:rcu_future_grace_period,rcu:rcu_grace_period_init,rcu:rcu_nocb_wake,rcu:rcu_preempt_task,rcu:rcu_unlock_preempted_task,rcu:rcu_quiescent_state_report,rcu:rcu_fqs,rcu:rcu_callback,rcu:rcu_kfree_callback,rcu:rcu_batch_start,rcu:rcu_invoke_callback,rcu:rcu_invoke_kfree_callback,rcu:rcu_batch_end,rcu:rcu_torture_read,rcu:rcu_barrier
echo " --- `date` Test summary:"
--
2.30.2