benchmarks: Add simple mmap benchmarks

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 165 insertions, 0 deletions

diff --git a/benchmarks/gem_mmap.c b/benchmarks/gem_mmap.c
new file mode 100644
index 00000000..7593e12a
--- /dev/null
+++ b/benchmarks/gem_mmap.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright © 2011-2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include "drm.h"
+#include "ioctl_wrappers.h"
+#include "drmtest.h"
+#include "igt_aux.h"
+#include "igt_stats.h"
+
+#define OBJECT_SIZE (1<<23)
+
+static uint64_t elapsed(const struct timespec *start,
+			const struct timespec *end)
+{
+	return 1000000000ULL*(end->tv_sec - start->tv_sec) + (end->tv_nsec - start->tv_nsec);
+}
+
+int main(int argc, char **argv)
+{
+	int fd = drm_open_any();
+	enum map {CPU, GTT, WC} map = CPU;
+	enum dir {READ, WRITE, CLEAR} dir = READ;
+	int tiling = I915_TILING_NONE;
+	void *buf = malloc(OBJECT_SIZE);
+	uint32_t handle;
+	void *ptr, *src, *dst;
+	int reps = 13;
+	int c, size;
+
+	while ((c = getopt (argc, argv, "m:d:r:t:")) != -1) {
+		switch (c) {
+		case 'm':
+			if (strcmp(optarg, "cpu") == 0)
+				map = CPU;
+			else if (strcmp(optarg, "gtt") == 0)
+				map = GTT;
+			else if (strcmp(optarg, "wc") == 0)
+				map = WC;
+			else
+				abort();
+			break;
+
+		case 'd':
+			if (strcmp(optarg, "read") == 0)
+				dir = READ;
+			else if (strcmp(optarg, "write") == 0)
+				dir = WRITE;
+			else if (strcmp(optarg, "clear") == 0)
+				dir = CLEAR;
+			else
+				abort();
+			break;
+
+		case 't':
+			if (strcmp(optarg, "x") == 0)
+				tiling = I915_TILING_X;
+			else if (strcmp(optarg, "y") == 0)
+				tiling = I915_TILING_Y;
+			else if (strcmp(optarg, "none") == 0)
+				tiling = I915_TILING_NONE;
+			else
+				abort();
+			break;
+
+		case 'r':
+			reps = atoi(optarg);
+			if (reps < 1)
+				reps = 1;
+			break;
+
+		default:
+			break;
+		}
+	}
+
+	handle = gem_create(fd, OBJECT_SIZE);
+	switch (map) {
+	case CPU:
+		ptr = gem_mmap__cpu(fd, handle, 0, OBJECT_SIZE, PROT_WRITE);
+		gem_set_domain(fd, handle, I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU);
+		break;
+	case GTT:
+		ptr = gem_mmap__gtt(fd, handle, OBJECT_SIZE, PROT_WRITE);
+		gem_set_domain(fd, handle, I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
+		break;
+	case WC:
+		ptr = gem_mmap__wc(fd, handle, 0, OBJECT_SIZE, PROT_WRITE);
+		gem_set_domain(fd, handle, I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
+		break;
+	default:
+		abort();
+	}
+
+	gem_set_tiling(fd, handle, tiling, 512);
+
+	if (dir == READ) {
+		src = ptr;
+		dst = buf;
+	} else {
+		src = buf;
+		dst = ptr;
+	}
+
+	for (size = 1; size <= OBJECT_SIZE; size <<= 1) {
+		igt_stats_t stats;
+		int n;
+
+		igt_stats_init_with_size(&stats, reps);
+
+		for (n = 0; n < reps; n++) {
+			struct timespec start, end;
+
+			clock_gettime(CLOCK_MONOTONIC, &start);
+			if (dir == CLEAR)
+				memset(dst, 0, size);
+			else
+				memcpy(dst, src, size);
+			clock_gettime(CLOCK_MONOTONIC, &end);
+
+			igt_stats_push(&stats, elapsed(&start, &end));
+		}
+
+		printf("%7.3f\n", igt_stats_get_trimean(&stats)/1000);
+		igt_stats_fini(&stats);
+	}
+
+	return 0;
+}