From 7225c0777271bb489ad6fb095aa10985ad138a81 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Sat, 11 May 2019 17:59:52 -0700 Subject: torture: Make --cpus override idleness calculations Currently, rcutorture will use relatively few CPUs to build the kernel on a busy system, which is often as it should be. However, if the user has used the --cpus argument to dedicate a specified number of CPUs to this torture test, it would be good if the kernel build also made use of them. This commit therefore changes the cpus2use.sh script to use --cpus when specified and to do the idleness calculations otherwise. Signed-off-by: Paul E. McKenney --- tools/testing/selftests/rcutorture/bin/cpus2use.sh | 5 +++++ tools/testing/selftests/rcutorture/bin/kvm.sh | 3 +++ 2 files changed, 8 insertions(+) (limited to 'tools/testing/selftests/rcutorture') diff --git a/tools/testing/selftests/rcutorture/bin/cpus2use.sh b/tools/testing/selftests/rcutorture/bin/cpus2use.sh index ff7102212703..4e9485590c10 100755 --- a/tools/testing/selftests/rcutorture/bin/cpus2use.sh +++ b/tools/testing/selftests/rcutorture/bin/cpus2use.sh @@ -9,6 +9,11 @@ # # Authors: Paul E. McKenney +if test -n "$TORTURE_ALLOTED_CPUS" +then + echo $TORTURE_ALLOTED_CPUS + exit 0 +fi ncpus=`grep '^processor' /proc/cpuinfo | wc -l` idlecpus=`mpstat | tail -1 | \ awk -v ncpus=$ncpus '{ print ncpus * ($7 + $NF) / 100 }'` diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh index 8c43eb43409b..ea6289a335f2 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm.sh @@ -24,6 +24,7 @@ dur=$((30*60)) dryrun="" KVM="`pwd`/tools/testing/selftests/rcutorture"; export KVM PATH=${KVM}/bin:$PATH; export PATH +TORTURE_ALLOTED_CPUS="" TORTURE_DEFCONFIG=defconfig TORTURE_BOOT_IMAGE="" TORTURE_INITRD="$KVM/initrd"; export TORTURE_INITRD @@ -89,6 +90,7 @@ do --cpus) checkarg --cpus "(number)" "$#" "$2" '^[0-9]*$' '^--' cpus=$2 + TORTURE_ALLOTED_CPUS="$2" shift ;; --datestamp) @@ -285,6 +287,7 @@ cat << ___EOF___ > $T/script CONFIGFRAG="$CONFIGFRAG"; export CONFIGFRAG KVM="$KVM"; export KVM PATH="$PATH"; export PATH +TORTURE_ALLOTED_CPUS="$TORTURE_ALLOTED_CPUS"; export TORTURE_ALLOTED_CPUS TORTURE_BOOT_IMAGE="$TORTURE_BOOT_IMAGE"; export TORTURE_BOOT_IMAGE TORTURE_BUILDONLY="$TORTURE_BUILDONLY"; export TORTURE_BUILDONLY TORTURE_DEFCONFIG="$TORTURE_DEFCONFIG"; export TORTURE_DEFCONFIG -- cgit v1.2.3-59-g8ed1b