diff options
| author |   John Hubbard <jhubbard@nvidia.com> | 2020-10-17 16:14:47 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-18 09:27:09 -0700 |
| commit | 255965309104fc62e3161997b93aea31c2c59941 (patch) | |
| tree | 6a645f805c95a611390c1fa1d042e09e45502479 /tools/testing/selftests/vm/hmm-tests.c | |
| parent | binfmt_elf: take the mmap lock around find_extend_vma() (diff) | |
| download | wireguard-linux-255965309104fc62e3161997b93aea31c2c59941.tar.xz wireguard-linux-255965309104fc62e3161997b93aea31c2c59941.zip | |
selftests/vm: 10x speedup for hmm-tests
This patch reduces the running time for hmm-tests from about 10+ seconds,
to just under 1.0 second, for an approximately 10x speedup. That brings
it in line with most of the other tests in selftests/vm, which mostly run
in < 1 sec.
This is done with a one-line change that simply reduces the number of
iterations of several tests, from 256, to 10. Thanks to Ralph Campbell
for suggesting changing NTIMES as a way to get the speedup.
Suggested-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: SeongJae Park <sj38.park@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Link: https://lkml.kernel.org/r/20201003011721.44238-1-jhubbard@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | tools/testing/selftests/vm/hmm-tests.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm-tests.c index 0a28a6a29581..c9404ef9698e 100644 --- a/tools/testing/selftests/vm/hmm-tests.c +++ b/tools/testing/selftests/vm/hmm-tests.c @@ -45,7 +45,7 @@ struct hmm_buffer { #define TWOMEG (1 << 21) #define HMM_BUFFER_SIZE (1024 << 12) #define HMM_PATH_MAX 64 -#define NTIMES 256 +#define NTIMES 10 #define ALIGN(x, a) (((x) + (a - 1)) & (~((a) - 1))) |