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torture: Add torture.sh --guest-cpu-limit argument for limited hosts

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Some servers have limitations on the number of CPUs a given guest OS
can use.  In my earlier experience, such limitations have been at least
half of the host's CPUs, but in a recent example, this limit is less
than 40%.  This commit therefore adds a --guest-cpu-limit argument that
allows such low limits to be made known to torture.sh.

Signed-off-by: "Paul E. McKenney" <paulmck@kernel.org>
Signed-off-by: Neeraj Upadhyay <neeraj.upadhyay@kernel.org>
This commit is contained in:
Paul E. McKenney 2024-08-01 17:37:50 -07:00 committed by Neeraj Upadhyay
parent 58cb321054
commit 1c5144a066
1 changed files with 27 additions and 11 deletions
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38
tools/testing/selftests/rcutorture/bin/torture.sh
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@ -19,10 +19,10 @@ PATH=${RCUTORTURE}/bin:$PATH; export PATH
TORTURE_ALLOTED_CPUS="`identify_qemu_vcpus`"
MAKE_ALLOTED_CPUS=$((TORTURE_ALLOTED_CPUS*2))
HALF_ALLOTED_CPUS=$((TORTURE_ALLOTED_CPUS/2))
if test "$HALF_ALLOTED_CPUS" -lt 1
SCALE_ALLOTED_CPUS=$((TORTURE_ALLOTED_CPUS/2))
if test "$SCALE_ALLOTED_CPUS" -lt 1
then
HALF_ALLOTED_CPUS=1
SCALE_ALLOTED_CPUS=1
fi
VERBOSE_BATCH_CPUS=$((TORTURE_ALLOTED_CPUS/16))
if test "$VERBOSE_BATCH_CPUS" -lt 2
@ -90,6 +90,7 @@ usage () {
echo " --do-scftorture / --do-no-scftorture / --no-scftorture"
echo " --do-srcu-lockdep / --do-no-srcu-lockdep / --no-srcu-lockdep"
echo " --duration [ <minutes> | <hours>h | <days>d ]"
echo " --guest-cpu-limit N"
echo " --kcsan-kmake-arg kernel-make-arguments"
exit 1
}
@ -203,6 +204,21 @@ do
duration_base=$(($ts*mult))
shift
;;
--guest-cpu-limit|--guest-cpu-lim)
checkarg --guest-cpu-limit "(number)" "$#" "$2" '^[0-9]*$' '^--'
if (("$2" <= "$TORTURE_ALLOTED_CPUS" / 2))
then
SCALE_ALLOTED_CPUS="$2"
VERBOSE_BATCH_CPUS="$((SCALE_ALLOTED_CPUS/8))"
if (("$VERBOSE_BATCH_CPUS" < 2))
then
VERBOSE_BATCH_CPUS=0
fi
else
echo "Ignoring value of $2 for --guest-cpu-limit which is greater than (("$TORTURE_ALLOTED_CPUS" / 2))."
fi
shift
;;
--kcsan-kmake-arg|--kcsan-kmake-args)
checkarg --kcsan-kmake-arg "(kernel make arguments)" $# "$2" '.*' '^error$'
kcsan_kmake_args="`echo "$kcsan_kmake_args $2" | sed -e 's/^ *//' -e 's/ *$//'`"
@ -425,9 +441,9 @@ fi
if test "$do_scftorture" = "yes"
then
# Scale memory based on the number of CPUs.
scfmem=$((3+HALF_ALLOTED_CPUS/16))
torture_bootargs="scftorture.nthreads=$HALF_ALLOTED_CPUS torture.disable_onoff_at_boot csdlock_debug=1"
torture_set "scftorture" tools/testing/selftests/rcutorture/bin/kvm.sh --torture scf --allcpus --duration "$duration_scftorture" --configs "$configs_scftorture" --kconfig "CONFIG_NR_CPUS=$HALF_ALLOTED_CPUS" --memory ${scfmem}G --trust-make
scfmem=$((3+SCALE_ALLOTED_CPUS/16))
torture_bootargs="scftorture.nthreads=$SCALE_ALLOTED_CPUS torture.disable_onoff_at_boot csdlock_debug=1"
torture_set "scftorture" tools/testing/selftests/rcutorture/bin/kvm.sh --torture scf --allcpus --duration "$duration_scftorture" --configs "$configs_scftorture" --kconfig "CONFIG_NR_CPUS=$SCALE_ALLOTED_CPUS" --memory ${scfmem}G --trust-make
fi
if test "$do_rt" = "yes"
@ -471,8 +487,8 @@ for prim in $primlist
do
if test -n "$firsttime"
then
torture_bootargs="refscale.scale_type="$prim" refscale.nreaders=$HALF_ALLOTED_CPUS refscale.loops=10000 refscale.holdoff=20 torture.disable_onoff_at_boot"
torture_set "refscale-$prim" tools/testing/selftests/rcutorture/bin/kvm.sh --torture refscale --allcpus --duration 5 --kconfig "CONFIG_TASKS_TRACE_RCU=y CONFIG_NR_CPUS=$HALF_ALLOTED_CPUS" --bootargs "refscale.verbose_batched=$VERBOSE_BATCH_CPUS torture.verbose_sleep_frequency=8 torture.verbose_sleep_duration=$VERBOSE_BATCH_CPUS" --trust-make
torture_bootargs="refscale.scale_type="$prim" refscale.nreaders=$SCALE_ALLOTED_CPUS refscale.loops=10000 refscale.holdoff=20 torture.disable_onoff_at_boot"
torture_set "refscale-$prim" tools/testing/selftests/rcutorture/bin/kvm.sh --torture refscale --allcpus --duration 5 --kconfig "CONFIG_TASKS_TRACE_RCU=y CONFIG_NR_CPUS=$SCALE_ALLOTED_CPUS" --bootargs "refscale.verbose_batched=$VERBOSE_BATCH_CPUS torture.verbose_sleep_frequency=8 torture.verbose_sleep_duration=$VERBOSE_BATCH_CPUS" --trust-make
mv $T/last-resdir-nodebug $T/first-resdir-nodebug || :
if test -f "$T/last-resdir-kasan"
then
@ -520,8 +536,8 @@ for prim in $primlist
do
if test -n "$firsttime"
then
torture_bootargs="rcuscale.scale_type="$prim" rcuscale.nwriters=$HALF_ALLOTED_CPUS rcuscale.holdoff=20 torture.disable_onoff_at_boot"
torture_set "rcuscale-$prim" tools/testing/selftests/rcutorture/bin/kvm.sh --torture rcuscale --allcpus --duration 5 --kconfig "CONFIG_TASKS_TRACE_RCU=y CONFIG_NR_CPUS=$HALF_ALLOTED_CPUS" --trust-make
torture_bootargs="rcuscale.scale_type="$prim" rcuscale.nwriters=$SCALE_ALLOTED_CPUS rcuscale.holdoff=20 torture.disable_onoff_at_boot"
torture_set "rcuscale-$prim" tools/testing/selftests/rcutorture/bin/kvm.sh --torture rcuscale --allcpus --duration 5 --kconfig "CONFIG_TASKS_TRACE_RCU=y CONFIG_NR_CPUS=$SCALE_ALLOTED_CPUS" --trust-make
mv $T/last-resdir-nodebug $T/first-resdir-nodebug || :
if test -f "$T/last-resdir-kasan"
then
@ -559,7 +575,7 @@ do_kcsan="$do_kcsan_save"
if test "$do_kvfree" = "yes"
then
torture_bootargs="rcuscale.kfree_rcu_test=1 rcuscale.kfree_nthreads=16 rcuscale.holdoff=20 rcuscale.kfree_loops=10000 torture.disable_onoff_at_boot"
torture_set "rcuscale-kvfree" tools/testing/selftests/rcutorture/bin/kvm.sh --torture rcuscale --allcpus --duration $duration_rcutorture --kconfig "CONFIG_NR_CPUS=$HALF_ALLOTED_CPUS" --memory 2G --trust-make
torture_set "rcuscale-kvfree" tools/testing/selftests/rcutorture/bin/kvm.sh --torture rcuscale --allcpus --duration $duration_rcutorture --kconfig "CONFIG_NR_CPUS=$SCALE_ALLOTED_CPUS" --memory 2G --trust-make
fi
if test "$do_clocksourcewd" = "yes"