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selftests/vm: run_vmtests: invoke gup_benchmark with basic FOLL_PIN coverage

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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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Link: http://lkml.kernel.org/r/20200211001536.1027652-11-jhubbard@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
John Hubbard 2020-04-01 21:05:45 -07:00 committed by Linus Torvalds
parent 41c45d37b9
commit be87141108
1 changed files with 22 additions and 0 deletions
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22
tools/testing/selftests/vm/run_vmtests
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@ -123,6 +123,28 @@ else
echo "[PASS]"
fi
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 -b (pin_user_pages)"
echo "------------------------------------------"
./gup_benchmark -b
if [ $? -ne 0 ]; then
echo "[FAIL]"
exitcode=1
else
echo "[PASS]"
fi
echo "-------------------"
echo "running userfaultfd"
echo "-------------------"