Messages in this thread Patch in this message | | | From | John Hubbard <> | Subject | [PATCH] selftests/vm: 10x speedup for hmm-tests | Date | Fri, 2 Oct 2020 18:17:21 -0700 |
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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> ---
This is based on mmotm.
tools/testing/selftests/vm/hmm-tests.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm-tests.c index 6b79723d7dc6..5d1ac691b9f4 100644 --- a/tools/testing/selftests/vm/hmm-tests.c +++ b/tools/testing/selftests/vm/hmm-tests.c @@ -49,7 +49,7 @@ 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))) -- 2.28.0
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