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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/tools/testing/selftests/vm/gup_benchmark.c
..
..
@@ -15,9 +15,19 @@
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 #define PAGE_SIZE sysconf(_SC_PAGESIZE)
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16
 
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 #define GUP_FAST_BENCHMARK	_IOWR('g', 1, struct gup_benchmark)
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+#define GUP_BENCHMARK		_IOWR('g', 2, struct gup_benchmark)
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+
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+/* Similar to above, but use FOLL_PIN instead of FOLL_GET. */
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+#define PIN_FAST_BENCHMARK	_IOWR('g', 3, struct gup_benchmark)
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+#define PIN_BENCHMARK		_IOWR('g', 4, struct gup_benchmark)
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+#define PIN_LONGTERM_BENCHMARK	_IOWR('g', 5, struct gup_benchmark)
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+
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+/* Just the flags we need, copied from mm.h: */
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+#define FOLL_WRITE	0x01	/* check pte is writable */
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27
 
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 struct gup_benchmark {
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-	__u64 delta_usec;
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+	__u64 get_delta_usec;
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+	__u64 put_delta_usec;
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 	__u64 addr;
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 	__u64 size;
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 	__u32 nr_pages_per_call;
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..
@@ -29,11 +39,22 @@
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 {
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 	struct gup_benchmark gup;
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 	unsigned long size = 128 * MB;
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-	int i, fd, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0;
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+	int i, fd, filed, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0;
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+	int cmd = GUP_FAST_BENCHMARK, flags = MAP_PRIVATE;
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+	char *file = "/dev/zero";
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 	char *p;
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46
 
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-	while ((opt = getopt(argc, argv, "m:r:n:tT")) != -1) {
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+	while ((opt = getopt(argc, argv, "m:r:n:f:abtTLUuwSH")) != -1) {
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 		switch (opt) {
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+		case 'a':
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+			cmd = PIN_FAST_BENCHMARK;
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+			break;
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+		case 'b':
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+			cmd = PIN_BENCHMARK;
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+			break;
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+		case 'L':
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+			cmd = PIN_LONGTERM_BENCHMARK;
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+			break;
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 		case 'm':
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 			size = atoi(optarg) * MB;
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 			break;
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@@ -49,25 +70,51 @@
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 		case 'T':
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 			thp = 0;
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 			break;
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+		case 'U':
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+			cmd = GUP_BENCHMARK;
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+			break;
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+		case 'u':
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+			cmd = GUP_FAST_BENCHMARK;
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+			break;
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 		case 'w':
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 			write = 1;
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+			break;
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+		case 'f':
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+			file = optarg;
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+			break;
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+		case 'S':
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+			flags &= ~MAP_PRIVATE;
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+			flags |= MAP_SHARED;
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+			break;
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+		case 'H':
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+			flags |= (MAP_HUGETLB | MAP_ANONYMOUS);
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 			break;
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 		default:
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 			return -1;
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 		}
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 	}
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96
 
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+	filed = open(file, O_RDWR|O_CREAT);
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+	if (filed < 0) {
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+		perror("open");
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+		exit(filed);
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+	}
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+
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 	gup.nr_pages_per_call = nr_pages;
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-	gup.flags = write;
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+	if (write)
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+		gup.flags |= FOLL_WRITE;
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106
 
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 	fd = open("/sys/kernel/debug/gup_benchmark", O_RDWR);
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-	if (fd == -1)
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-		perror("open"), exit(1);
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+	if (fd == -1) {
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+		perror("open");
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+		exit(1);
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+	}
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112
 
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-	p = mmap(NULL, size, PROT_READ | PROT_WRITE,
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-			MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
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-	if (p == MAP_FAILED)
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-		perror("mmap"), exit(1);
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+	p = mmap(NULL, size, PROT_READ | PROT_WRITE, flags, filed, 0);
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+	if (p == MAP_FAILED) {
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+		perror("mmap");
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+		exit(1);
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+	}
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 	gup.addr = (unsigned long)p;
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119
 
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 	if (thp == 1)
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..
@@ -80,10 +127,13 @@
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127
 
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 	for (i = 0; i < repeats; i++) {
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 		gup.size = size;
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-		if (ioctl(fd, GUP_FAST_BENCHMARK, &gup))
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-			perror("ioctl"), exit(1);
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+		if (ioctl(fd, cmd, &gup)) {
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+			perror("ioctl");
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+			exit(1);
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+		}
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134
 
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-		printf("Time: %lld us", gup.delta_usec);
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+		printf("Time: get:%lld put:%lld us", gup.get_delta_usec,
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+			gup.put_delta_usec);
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 		if (gup.size != size)
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 			printf(", truncated (size: %lld)", gup.size);
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 		printf("\n");