1 files changed, 0 insertions, 144 deletions
diff --git a/tools/testing/selftests/vm/transhuge-stress.c b/tools/testing/selftests/vm/transhuge-stress.c
deleted file mode 100644
index fd7f1b4a96f9..000000000000
--- a/tools/testing/selftests/vm/transhuge-stress.c
+++ /dev/null
@@ -1,144 +0,0 @@
-/*
- * Stress test for transparent huge pages, memory compaction and migration.
- *
- * Authors: Konstantin Khlebnikov <koct9i@gmail.com>
- *
- * This is free and unencumbered software released into the public domain.
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <err.h>
-#include <time.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <string.h>
-#include <sys/mman.h>
-
-#define PAGE_SHIFT 12
-#define HPAGE_SHIFT 21
-
-#define PAGE_SIZE (1 << PAGE_SHIFT)
-#define HPAGE_SIZE (1 << HPAGE_SHIFT)
-
-#define PAGEMAP_PRESENT(ent)	(((ent) & (1ull << 63)) != 0)
-#define PAGEMAP_PFN(ent)	((ent) & ((1ull << 55) - 1))
-
-int pagemap_fd;
-
-int64_t allocate_transhuge(void *ptr)
-{
-	uint64_t ent[2];
-
-	/* drop pmd */
-	if (mmap(ptr, HPAGE_SIZE, PROT_READ | PROT_WRITE,
-				MAP_FIXED | MAP_ANONYMOUS |
-				MAP_NORESERVE | MAP_PRIVATE, -1, 0) != ptr)
-		errx(2, "mmap transhuge");
-
-	if (madvise(ptr, HPAGE_SIZE, MADV_HUGEPAGE))
-		err(2, "MADV_HUGEPAGE");
-
-	/* allocate transparent huge page */
-	*(volatile void **)ptr = ptr;
-
-	if (pread(pagemap_fd, ent, sizeof(ent),
-			(uintptr_t)ptr >> (PAGE_SHIFT - 3)) != sizeof(ent))
-		err(2, "read pagemap");
-
-	if (PAGEMAP_PRESENT(ent[0]) && PAGEMAP_PRESENT(ent[1]) &&
-	    PAGEMAP_PFN(ent[0]) + 1 == PAGEMAP_PFN(ent[1]) &&
-	    !(PAGEMAP_PFN(ent[0]) & ((1 << (HPAGE_SHIFT - PAGE_SHIFT)) - 1)))
-		return PAGEMAP_PFN(ent[0]);
-
-	return -1;
-}
-
-int main(int argc, char **argv)
-{
-	size_t ram, len;
-	void *ptr, *p;
-	struct timespec a, b;
-	double s;
-	uint8_t *map;
-	size_t map_len;
-
-	ram = sysconf(_SC_PHYS_PAGES);
-	if (ram > SIZE_MAX / sysconf(_SC_PAGESIZE) / 4)
-		ram = SIZE_MAX / 4;
-	else
-		ram *= sysconf(_SC_PAGESIZE);
-
-	if (argc == 1)
-		len = ram;
-	else if (!strcmp(argv[1], "-h"))
-		errx(1, "usage: %s [size in MiB]", argv[0]);
-	else
-		len = atoll(argv[1]) << 20;
-
-	warnx("allocate %zd transhuge pages, using %zd MiB virtual memory"
-	      " and %zd MiB of ram", len >> HPAGE_SHIFT, len >> 20,
-	      len >> (20 + HPAGE_SHIFT - PAGE_SHIFT - 1));
-
-	pagemap_fd = open("/proc/self/pagemap", O_RDONLY);
-	if (pagemap_fd < 0)
-		err(2, "open pagemap");
-
-	len -= len % HPAGE_SIZE;
-	ptr = mmap(NULL, len + HPAGE_SIZE, PROT_READ | PROT_WRITE,
-			MAP_ANONYMOUS | MAP_NORESERVE | MAP_PRIVATE, -1, 0);
-	if (ptr == MAP_FAILED)
-		err(2, "initial mmap");
-	ptr += HPAGE_SIZE - (uintptr_t)ptr % HPAGE_SIZE;
-
-	if (madvise(ptr, len, MADV_HUGEPAGE))
-		err(2, "MADV_HUGEPAGE");
-
-	map_len = ram >> (HPAGE_SHIFT - 1);
-	map = malloc(map_len);
-	if (!map)
-		errx(2, "map malloc");
-
-	while (1) {
-		int nr_succeed = 0, nr_failed = 0, nr_pages = 0;
-
-		memset(map, 0, map_len);
-
-		clock_gettime(CLOCK_MONOTONIC, &a);
-		for (p = ptr; p < ptr + len; p += HPAGE_SIZE) {
-			int64_t pfn;
-
-			pfn = allocate_transhuge(p);
-
-			if (pfn < 0) {
-				nr_failed++;
-			} else {
-				size_t idx = pfn >> (HPAGE_SHIFT - PAGE_SHIFT);
-
-				nr_succeed++;
-				if (idx >= map_len) {
-					map = realloc(map, idx + 1);
-					if (!map)
-						errx(2, "map realloc");
-					memset(map + map_len, 0, idx + 1 - map_len);
-					map_len = idx + 1;
-				}
-				if (!map[idx])
-					nr_pages++;
-				map[idx] = 1;
-			}
-
-			/* split transhuge page, keep last page */
-			if (madvise(p, HPAGE_SIZE - PAGE_SIZE, MADV_DONTNEED))
-				err(2, "MADV_DONTNEED");
-		}
-		clock_gettime(CLOCK_MONOTONIC, &b);
-		s = b.tv_sec - a.tv_sec + (b.tv_nsec - a.tv_nsec) / 1000000000.;
-
-		warnx("%.3f s/loop, %.3f ms/page, %10.3f MiB/s\t"
-		      "%4d succeed, %4d failed, %4d different pages",
-		      s, s * 1000 / (len >> HPAGE_SHIFT), len / s / (1 << 20),
-		      nr_succeed, nr_failed, nr_pages);
-	}
-}