From: John Hubbard <jhubbard@xxxxxxxxxx> Subject: selftests/vm: 2x speedup for run_vmtests.sh Each invocation of userfaultfd for "anon" and "shmem" was taking about 6.5 sec to run, contributing to an overall run time of about 22 sec for run_vmtests.sh. Reduce the size and bounce input values to the userfaultfd invocation within run_vmtests.sh, enough to get each invocation down to about 1.0 sec. This should still provide a reasonable smoke test, while staying within a nominal time budget of around 1 second or so per test. And this brings the overall running time of run_vmtests.sh down to 11 second. Link: https://lkml.kernel.org/r/20201026064021.3545418-10-jhubbard@xxxxxxxxxx Signed-off-by: John Hubbard <jhubbard@xxxxxxxxxx> Cc: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx> Cc: Shuah Khan <shuah@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- tools/testing/selftests/vm/run_vmtests | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/tools/testing/selftests/vm/run_vmtests~selftests-vm-2x-speedup-for-run_vmtestssh +++ a/tools/testing/selftests/vm/run_vmtests @@ -160,7 +160,7 @@ fi echo "-------------------" echo "running userfaultfd" echo "-------------------" -./userfaultfd anon 128 32 +./userfaultfd anon 20 16 if [ $? -ne 0 ]; then echo "[FAIL]" exitcode=1 @@ -185,7 +185,7 @@ rm -f $mnt/ufd_test_file echo "-------------------------" echo "running userfaultfd_shmem" echo "-------------------------" -./userfaultfd shmem 128 32 +./userfaultfd shmem 20 16 if [ $? -ne 0 ]; then echo "[FAIL]" exitcode=1 _
