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authorJohn Hubbard <jhubbard@nvidia.com>2020-10-18 02:14:47 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-18 19:27:09 +0300
commit255965309104fc62e3161997b93aea31c2c59941 (patch)
tree6a645f805c95a611390c1fa1d042e09e45502479 /tools
parentb2767d97f5ff758250cf28684aaa48bbfd34145f (diff)
downloadlinux-255965309104fc62e3161997b93aea31c2c59941.tar.xz
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 'tools')
-rw-r--r--tools/testing/selftests/vm/hmm-tests.c2
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)))