diff options
| author | Keith Busch <[email protected]> | 2018-10-26 15:10:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2018-10-26 16:38:15 -0700 |
| commit | 0dd8666afb99c71d124e0c2abf1ad7d934a242a0 (patch) | |
| tree | 46a7bc2b351b03dc97be4b05257e56a453afa7a8 | |
| parent | aeb85ed4f41a8c0f5c4606d69f5da75e2348d984 (diff) | |
tools/testing/selftests/vm/gup_benchmark.c: add MAP_SHARED option
Add a new benchmark option, -S, to request MAP_SHARED. This can be used
to compare with MAP_PRIVATE, or for files that require this option, like
dax.
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Keith Busch <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Kirill Shutemov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Dan Williams <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | tools/testing/selftests/vm/gup_benchmark.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/tools/testing/selftests/vm/gup_benchmark.c b/tools/testing/selftests/vm/gup_benchmark.c index 43a2d60e0e93..5c8e4cb1441a 100644 --- a/tools/testing/selftests/vm/gup_benchmark.c +++ b/tools/testing/selftests/vm/gup_benchmark.c @@ -32,11 +32,11 @@ int main(int argc, char **argv) struct gup_benchmark gup; unsigned long size = 128 * MB; int i, fd, filed, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0; - int cmd = GUP_FAST_BENCHMARK; + int cmd = GUP_FAST_BENCHMARK, flags = MAP_PRIVATE; char *file = "/dev/zero"; char *p; - while ((opt = getopt(argc, argv, "m:r:n:f:tTLU")) != -1) { + while ((opt = getopt(argc, argv, "m:r:n:f:tTLUS")) != -1) { switch (opt) { case 'm': size = atoi(optarg) * MB; @@ -65,6 +65,10 @@ int main(int argc, char **argv) case 'f': file = optarg; break; + case 'S': + flags &= ~MAP_PRIVATE; + flags |= MAP_SHARED; + break; default: return -1; } @@ -83,7 +87,7 @@ int main(int argc, char **argv) if (fd == -1) perror("open"), exit(1); - p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, filed, 0); + p = mmap(NULL, size, PROT_READ | PROT_WRITE, flags, filed, 0); if (p == MAP_FAILED) perror("mmap"), exit(1); gup.addr = (unsigned long)p; |