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Message-Id: <20210106173119.23159-6-paulmck@kernel.org>
Date: Wed, 6 Jan 2021 09:31:07 -0800
From: paulmck@...nel.org
To: rcu@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel-team@...com, mingo@...nel.org,
jiangshanlai@...il.com, akpm@...ux-foundation.org,
mathieu.desnoyers@...icios.com, josh@...htriplett.org,
tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
dhowells@...hat.com, edumazet@...gle.com, fweisbec@...il.com,
oleg@...hat.com, joel@...lfernandes.org,
"Paul E. McKenney" <paulmck@...nel.org>
Subject: [PATCH tip/core/rcu 06/18] torture: Auto-size SCF and scaling runs based on number of CPUs
From: "Paul E. McKenney" <paulmck@...nel.org>
This commit improves torture.sh flexibility by autoscaling the number
of CPUs to be used in variable-CPUs torture tests, including scftorture,
refscale, rcuscale, and kvfree.
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
tools/testing/selftests/rcutorture/bin/torture.sh | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh b/tools/testing/selftests/rcutorture/bin/torture.sh
index 57f2f31..e13dacf 100755
--- a/tools/testing/selftests/rcutorture/bin/torture.sh
+++ b/tools/testing/selftests/rcutorture/bin/torture.sh
@@ -19,6 +19,11 @@ PATH=${KVM}/bin:$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 "$HALF_ALLOTED_CPUS" -lt 1
+then
+ HALF_ALLOTED_CPUS=1
+fi
# Default duration and apportionment.
duration_base=10
@@ -291,8 +296,8 @@ fi
if test "$do_scftorture" = "yes"
then
- torture_bootargs="scftorture.nthreads=224 torture.disable_onoff_at_boot"
- torture_set "scftorture" tools/testing/selftests/rcutorture/bin/kvm.sh --torture scf --allcpus --duration "$duration_scftorture" --kconfig "CONFIG_NR_CPUS=224" --trust-make
+ torture_bootargs="scftorture.nthreads=$HALF_ALLOTED_CPUS torture.disable_onoff_at_boot"
+ torture_set "scftorture" tools/testing/selftests/rcutorture/bin/kvm.sh --torture scf --allcpus --duration "$duration_scftorture" --kconfig "CONFIG_NR_CPUS=$HALF_ALLOTED_CPUS" --trust-make
fi
if test "$do_refscale" = yes
@@ -303,8 +308,8 @@ else
fi
for prim in $primlist
do
- torture_bootargs="refscale.scale_type="$prim" refscale.nreaders=224 refscale.loops=10000 refscale.holdoff=20 torture.disable_onoff_at_boot"
- torture_set "refscale-$prim" tools/testing/selftests/rcutorture/bin/kvm.sh --torture refscale --allcpus --duration 5 --kconfig "CONFIG_NR_CPUS=224" --trust-make
+ torture_bootargs="refscale.scale_type="$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_NR_CPUS=$HALF_ALLOTED_CPUS" --trust-make
done
if test "$do_rcuscale" = yes
@@ -315,14 +320,14 @@ else
fi
for prim in $primlist
do
- torture_bootargs="rcuscale.scale_type="$prim" rcuscale.nwriters=224 rcuscale.holdoff=20 torture.disable_onoff_at_boot"
- torture_set "rcuscale-$prim" tools/testing/selftests/rcutorture/bin/kvm.sh --torture rcuscale --allcpus --duration 5 --kconfig "CONFIG_NR_CPUS=224" --trust-make
+ torture_bootargs="rcuscale.scale_type="$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_NR_CPUS=$HALF_ALLOTED_CPUS" --trust-make
done
if test "$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 10 --kconfig "CONFIG_NR_CPUS=224" --trust-make
+ torture_set "rcuscale-kvfree" tools/testing/selftests/rcutorture/bin/kvm.sh --torture rcuscale --allcpus --duration 10 --kconfig "CONFIG_NR_CPUS=$HALF_ALLOTED_CPUS" --trust-make
fi
echo " --- " $scriptname $args
--
2.9.5
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