It's good to have basic unit test coverage of the new FOLL_PIN behavior. Fortunately, the gup_benchmark unit test is extremely fast (a few milliseconds), so adding it the the run_vmtests suite is going to cause no noticeable change in running time.
So, add two new invocations to run_vmtests:
1) Run gup_benchmark with normal get_user_pages().
2) Run gup_benchmark with pin_user_pages(). This is much like the first call, except that it sets FOLL_PIN.
Running these two in quick succession also provide a visual comparison of the running times, which is convenient.
The new invocations are fairly early in the run_vmtests script, because with test suites, it's usually preferable to put the shorter, faster tests first, all other things being equal.
Signed-off-by: John Hubbard jhubbard@nvidia.com --- tools/testing/selftests/vm/run_vmtests | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests index 951c507a27f7..93e8dc9a7cad 100755 --- a/tools/testing/selftests/vm/run_vmtests +++ b/tools/testing/selftests/vm/run_vmtests @@ -104,6 +104,28 @@ echo "NOTE: The above hugetlb tests provide minimal coverage. Use" echo " https://github.com/libhugetlbfs/libhugetlbfs.git for" echo " hugetlb regression testing."
+echo "--------------------------------------------" +echo "running 'gup_benchmark -U' (normal/slow gup)" +echo "--------------------------------------------" +./gup_benchmark -U +if [ $? -ne 0 ]; then + echo "[FAIL]" + exitcode=1 +else + echo "[PASS]" +fi + +echo "------------------------------------------" +echo "running gup_benchmark -c (pin_user_pages)" +echo "------------------------------------------" +./gup_benchmark -c +if [ $? -ne 0 ]; then + echo "[FAIL]" + exitcode=1 +else + echo "[PASS]" +fi + echo "-------------------" echo "running userfaultfd" echo "-------------------"