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| author | Keith Busch <keith.busch@intel.com> | 2018-10-26 15:09:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-26 16:38:15 -0700 |
| commit | 714a3a1ebafe6e23af55a5c694c308f4044a7e00 (patch) | |
| tree | 3ae2fe79f50cf9b0dff05e93c8cb69e71752f571 | |
| parent | 26db3d09d9e1963c9db77cb275bd2d36e56ef57a (diff) | |
| download | lwn-714a3a1ebafe6e23af55a5c694c308f4044a7e00.tar.gz lwn-714a3a1ebafe6e23af55a5c694c308f4044a7e00.zip | |
mm/gup_benchmark.c: add additional pinning methods
Provide new gup benchmark ioctl commands to run different user page
pinning methods, get_user_pages_longterm() and get_user_pages(), in
addition to the existing get_user_pages_fast().
Link: http://lkml.kernel.org/r/20181010195605.10689-2-keith.busch@intel.com
Signed-off-by: Keith Busch <keith.busch@intel.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
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-- | mm/gup_benchmark.c | 28 | ||||
| -rw-r--r-- | tools/testing/selftests/vm/gup_benchmark.c | 13 |
2 files changed, 37 insertions, 4 deletions
diff --git a/mm/gup_benchmark.c b/mm/gup_benchmark.c index e6aff102373b..debf11388a60 100644 --- a/mm/gup_benchmark.c +++ b/mm/gup_benchmark.c @@ -6,6 +6,8 @@ #include <linux/debugfs.h> #define GUP_FAST_BENCHMARK _IOWR('g', 1, struct gup_benchmark) +#define GUP_LONGTERM_BENCHMARK _IOWR('g', 2, struct gup_benchmark) +#define GUP_BENCHMARK _IOWR('g', 3, struct gup_benchmark) struct gup_benchmark { __u64 get_delta_usec; @@ -43,7 +45,23 @@ static int __gup_benchmark_ioctl(unsigned int cmd, nr = (next - addr) / PAGE_SIZE; } - nr = get_user_pages_fast(addr, nr, gup->flags & 1, pages + i); + switch (cmd) { + case GUP_FAST_BENCHMARK: + nr = get_user_pages_fast(addr, nr, gup->flags & 1, + pages + i); + break; + case GUP_LONGTERM_BENCHMARK: + nr = get_user_pages_longterm(addr, nr, gup->flags & 1, + pages + i, NULL); + break; + case GUP_BENCHMARK: + nr = get_user_pages(addr, nr, gup->flags & 1, pages + i, + NULL); + break; + default: + return -1; + } + if (nr <= 0) break; i += nr; @@ -72,8 +90,14 @@ static long gup_benchmark_ioctl(struct file *filep, unsigned int cmd, struct gup_benchmark gup; int ret; - if (cmd != GUP_FAST_BENCHMARK) + switch (cmd) { + case GUP_FAST_BENCHMARK: + case GUP_LONGTERM_BENCHMARK: + case GUP_BENCHMARK: + break; + default: return -EINVAL; + } if (copy_from_user(&gup, (void __user *)arg, sizeof(gup))) return -EFAULT; diff --git a/tools/testing/selftests/vm/gup_benchmark.c b/tools/testing/selftests/vm/gup_benchmark.c index bdcb97acd0ac..c2f785ded9b9 100644 --- a/tools/testing/selftests/vm/gup_benchmark.c +++ b/tools/testing/selftests/vm/gup_benchmark.c @@ -15,6 +15,8 @@ #define PAGE_SIZE sysconf(_SC_PAGESIZE) #define GUP_FAST_BENCHMARK _IOWR('g', 1, struct gup_benchmark) +#define GUP_LONGTERM_BENCHMARK _IOWR('g', 2, struct gup_benchmark) +#define GUP_BENCHMARK _IOWR('g', 3, struct gup_benchmark) struct gup_benchmark { __u64 get_delta_usec; @@ -30,9 +32,10 @@ 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 cmd = GUP_FAST_BENCHMARK; char *p; - while ((opt = getopt(argc, argv, "m:r:n:tT")) != -1) { + while ((opt = getopt(argc, argv, "m:r:n:tTLU")) != -1) { switch (opt) { case 'm': size = atoi(optarg) * MB; @@ -49,6 +52,12 @@ int main(int argc, char **argv) case 'T': thp = 0; break; + case 'L': + cmd = GUP_LONGTERM_BENCHMARK; + break; + case 'U': + cmd = GUP_BENCHMARK; + break; case 'w': write = 1; default: @@ -79,7 +88,7 @@ int main(int argc, char **argv) for (i = 0; i < repeats; i++) { gup.size = size; - if (ioctl(fd, GUP_FAST_BENCHMARK, &gup)) + if (ioctl(fd, cmd, &gup)) perror("ioctl"), exit(1); printf("Time: get:%lld put:%lld us", gup.get_delta_usec, |