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| author | Keith Busch <keith.busch@intel.com> | 2018-10-26 15:10:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-26 16:38:15 -0700 |
| commit | aeb85ed4f41a8c0f5c4606d69f5da75e2348d984 (patch) | |
| tree | 4f0bafc535530f7a5eb94605f394b085641e3a8a | |
| parent | 319e0bec1aecb36c5ac6d23812af487ff2c8f47f (diff) | |
| download | linux-aeb85ed4f41a8c0f5c4606d69f5da75e2348d984.tar.bz2 | |
tools/testing/selftests/vm/gup_benchmark.c: allow user specified file
Allow a user to specify a file to map by adding a new option, '-f',
providing a means to test various file backings.
If not specified, the benchmark will use a private mapping of /dev/zero,
which produces an anonymous mapping as before.
[akpm@linux-foundation.org: avoid using comma operator]
Link: http://lkml.kernel.org/r/20181010195605.10689-4-keith.busch@intel.com
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | tools/testing/selftests/vm/gup_benchmark.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/tools/testing/selftests/vm/gup_benchmark.c b/tools/testing/selftests/vm/gup_benchmark.c index b2082df8beb4..43a2d60e0e93 100644 --- a/tools/testing/selftests/vm/gup_benchmark.c +++ b/tools/testing/selftests/vm/gup_benchmark.c @@ -31,11 +31,12 @@ int main(int argc, char **argv) { struct gup_benchmark gup; unsigned long size = 128 * MB; - int i, fd, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0; + int i, fd, filed, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0; int cmd = GUP_FAST_BENCHMARK; + char *file = "/dev/zero"; char *p; - while ((opt = getopt(argc, argv, "m:r:n:tTLU")) != -1) { + while ((opt = getopt(argc, argv, "m:r:n:f:tTLU")) != -1) { switch (opt) { case 'm': size = atoi(optarg) * MB; @@ -61,11 +62,20 @@ int main(int argc, char **argv) case 'w': write = 1; break; + case 'f': + file = optarg; + break; default: return -1; } } + filed = open(file, O_RDWR|O_CREAT); + if (filed < 0) { + perror("open"); + exit(filed); + } + gup.nr_pages_per_call = nr_pages; gup.flags = write; @@ -73,8 +83,7 @@ int main(int argc, char **argv) if (fd == -1) perror("open"), exit(1); - p = mmap(NULL, size, PROT_READ | PROT_WRITE, - MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); + p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, filed, 0); if (p == MAP_FAILED) perror("mmap"), exit(1); gup.addr = (unsigned long)p; |