On Fri, 2 Oct 2020 18:17:21 -0700 John Hubbard jhubbard@nvidia.com wrote:
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.
Could this result in reduced test capacity? If so, how about making the number easily tweakable?
Thanks, SeongJae Park
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