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-rw-r--r--tools/testing/selftests/vm/gup_benchmark.c143
1 files changed, 0 insertions, 143 deletions
diff --git a/tools/testing/selftests/vm/gup_benchmark.c b/tools/testing/selftests/vm/gup_benchmark.c
deleted file mode 100644
index 1d4359341e44..000000000000
--- a/tools/testing/selftests/vm/gup_benchmark.c
+++ /dev/null
@@ -1,143 +0,0 @@
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include <linux/types.h>
-
-#define MB (1UL << 20)
-#define PAGE_SIZE sysconf(_SC_PAGESIZE)
-
-#define GUP_FAST_BENCHMARK _IOWR('g', 1, struct gup_benchmark)
-#define GUP_BENCHMARK _IOWR('g', 2, struct gup_benchmark)
-
-/* Similar to above, but use FOLL_PIN instead of FOLL_GET. */
-#define PIN_FAST_BENCHMARK _IOWR('g', 3, struct gup_benchmark)
-#define PIN_BENCHMARK _IOWR('g', 4, struct gup_benchmark)
-#define PIN_LONGTERM_BENCHMARK _IOWR('g', 5, struct gup_benchmark)
-
-/* Just the flags we need, copied from mm.h: */
-#define FOLL_WRITE 0x01 /* check pte is writable */
-
-struct gup_benchmark {
- __u64 get_delta_usec;
- __u64 put_delta_usec;
- __u64 addr;
- __u64 size;
- __u32 nr_pages_per_call;
- __u32 flags;
- __u64 expansion[10]; /* For future use */
-};
-
-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, flags = MAP_PRIVATE;
- char *file = "/dev/zero";
- char *p;
-
- while ((opt = getopt(argc, argv, "m:r:n:f:abtTLUuwSH")) != -1) {
- switch (opt) {
- case 'a':
- cmd = PIN_FAST_BENCHMARK;
- break;
- case 'b':
- cmd = PIN_BENCHMARK;
- break;
- case 'L':
- cmd = PIN_LONGTERM_BENCHMARK;
- break;
- case 'm':
- size = atoi(optarg) * MB;
- break;
- case 'r':
- repeats = atoi(optarg);
- break;
- case 'n':
- nr_pages = atoi(optarg);
- break;
- case 't':
- thp = 1;
- break;
- case 'T':
- thp = 0;
- break;
- case 'U':
- cmd = GUP_BENCHMARK;
- break;
- case 'u':
- cmd = GUP_FAST_BENCHMARK;
- break;
- case 'w':
- write = 1;
- break;
- case 'f':
- file = optarg;
- break;
- case 'S':
- flags &= ~MAP_PRIVATE;
- flags |= MAP_SHARED;
- break;
- case 'H':
- flags |= (MAP_HUGETLB | MAP_ANONYMOUS);
- 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;
- if (write)
- gup.flags |= FOLL_WRITE;
-
- fd = open("/sys/kernel/debug/gup_benchmark", O_RDWR);
- if (fd == -1) {
- perror("open");
- exit(1);
- }
-
- p = mmap(NULL, size, PROT_READ | PROT_WRITE, flags, filed, 0);
- if (p == MAP_FAILED) {
- perror("mmap");
- exit(1);
- }
- gup.addr = (unsigned long)p;
-
- if (thp == 1)
- madvise(p, size, MADV_HUGEPAGE);
- else if (thp == 0)
- madvise(p, size, MADV_NOHUGEPAGE);
-
- for (; (unsigned long)p < gup.addr + size; p += PAGE_SIZE)
- p[0] = 0;
-
- for (i = 0; i < repeats; i++) {
- gup.size = size;
- if (ioctl(fd, cmd, &gup)) {
- perror("ioctl");
- exit(1);
- }
-
- printf("Time: get:%lld put:%lld us", gup.get_delta_usec,
- gup.put_delta_usec);
- if (gup.size != size)
- printf(", truncated (size: %lld)", gup.size);
- printf("\n");
- }
-
- return 0;
-}