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selftests/vm: 2x speedup for run_vmtests.sh

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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@nvidia.com
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
John Hubbard 2020-12-14 19:05:31 -08:00 committed by Linus Torvalds
parent f3a45709d2
commit a26c4c6299
1 changed files with 2 additions and 2 deletions
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4
tools/testing/selftests/vm/run_vmtests
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@ -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