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torture: Scale scftorture memory based on number of CPUs

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As the number of CPUs increases, the number of outstanding no-wait
smp_call_function() handlers also increases, so that the default of
2G of memory is not always sufficient on 80-CPU systems.  This commit
therefore scales the amount of memory specified to qemu based on the
number of CPUs specified to the scftorture test instance.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney
2023-05-16 06:18:32 -07:00
parent 06c2afb862
commit 822e425099
1 changed files with 3 additions and 1 deletions
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4
tools/testing/selftests/rcutorture/bin/torture.sh
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@@ -376,8 +376,10 @@ fi
if test "$do_scftorture" = "yes"
then
# Scale memory based on the number of CPUs.
scfmem=$((2+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 2G --trust-make
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 ${scfmem}G --trust-make
fi
if test "$do_rt" = "yes"