HACK: benchmarks: Read BOs to measure performance against VGEM

benchmarks/Makefile.sources

@@ -4,6 +4,7 @@ benchmarks_PROGRAMS =			\
 	intel_upload_blit_large         \
 	intel_upload_blit_large_gtt     \
 	intel_upload_blit_large_map     \
+	intel_upload_blit_large_vgem     \
 	intel_upload_blit_small		\
 	gem_create			\
 	gem_exec_ctx			\

benchmarks/intel_upload_blit_large.c

@@ -84,12 +84,13 @@ do_render(drm_intel_bufmgr *bufmgr, struct intel_batchbuffer *batch,
 	drm_intel_bo *src_bo;
 	int i;
 	static uint32_t seed = 1;
+	int x = 0;
 
 	/* Generate some junk.  Real workloads would be doing a lot more
 	 * work to generate the junk.
 	 */
 	for (i = 0; i < width * height; i++) {
-		data[i] = seed++;
+		x = data[i];
 	}
 
 	/* Upload the junk. */

benchmarks/intel_upload_blit_large_gtt.c

@@ -82,6 +82,7 @@ do_render(drm_intel_bufmgr *bufmgr, struct intel_batchbuffer *batch,
 	drm_intel_bo *src_bo;
 	int i;
 	static uint32_t seed = 1;
+	int x = 0;
 
 	src_bo = drm_intel_bo_alloc(bufmgr, "src", width * height * 4, 4096);
 
@@ -89,7 +90,7 @@ do_render(drm_intel_bufmgr *bufmgr, struct intel_batchbuffer *batch,
 
 	data = src_bo->virtual;
 	for (i = 0; i < width * height; i++) {
-		data[i] = seed++;
+		x = data[i];
 	}
 
 	drm_intel_gem_bo_unmap_gtt(src_bo);

benchmarks/intel_upload_blit_large_map.c

@@ -67,6 +67,8 @@
 #define OBJECT_WIDTH	1280
 #define OBJECT_HEIGHT	720
 
+int fd;
+
 static double
 get_time_in_secs(void)
 {
@@ -82,17 +84,27 @@ do_render(drm_intel_bufmgr *bufmgr, struct intel_batchbuffer *batch,
 	  drm_intel_bo *dst_bo, int width, int height)
 {
 	uint32_t *data;
-	drm_intel_bo *src_bo;
-	int i;
+	drm_intel_bo *src_bo, *tmp_bo;
+	int i, prime_fd;
 	static uint32_t seed = 1;
+	int x = 0;
 
 	src_bo = drm_intel_bo_alloc(bufmgr, "src", width * height * 4, 4096);
-
+#if 0
+	// this is here just to see overhead it takes and compare with vgem's.
+	{
+		drm_intel_bo_gem_export_to_prime(src_bo, &prime_fd);
+		if (drmPrimeFDToHandle(fd, prime_fd, &tmp_bo)) {
+			fprintf(stderr, "failed to import handle\n");
+			return;
+		}
+	}
+#endif
 	drm_intel_bo_map(src_bo, 1);
 
 	data = src_bo->virtual;
 	for (i = 0; i < width * height; i++) {
-		data[i] = seed++;
+		x = data[i];
 	}
 
 	drm_intel_bo_unmap(src_bo);
@@ -117,7 +129,6 @@ do_render(drm_intel_bufmgr *bufmgr, struct intel_batchbuffer *batch,
 
 int main(int argc, char **argv)
 {
-	int fd;
 	int object_size = OBJECT_WIDTH * OBJECT_HEIGHT * 4;
 	double start_time, end_time;
 	drm_intel_bo *dst_bo;

benchmarks/intel_upload_blit_large_vgem.c

@@ -0,0 +1,238 @@
+/*
+ * Copyright © 2009 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:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+/**
+ * Roughly simulates repeatedly uploading frames of images, by uploading
+ * the data all at once with pwrite, and then blitting it to another buffer.
+ *
+ * You might think of this like a movie player, but that wouldn't be entirely
+ * accurate, since the access patterns of the memory would be different
+ * (generally, smaller source image, upscaled, an thus different memory access
+ * pattern in both texel fetch for the stretching and the destination writes).
+ * However, some things like swfdec would be doing something like this since
+ * they compute their data in host memory and upload the full sw rendered
+ * frame.
+ *
+ * Additionally, those applications should be rendering at the screen refresh
+ * rate, while this test has no limits, and so can get itself into the
+ * working set larger than aperture size performance disaster.
+ *
+ * The current workload we have that does large drm_intel_bo_map()
+ * uploads is texture upload for OpenGL (as it frequently is doing
+ * reformatting as it uploads the user's data, making bo_subdata less
+ * suitable)
+ */
+
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_bufmgr.h"
+#include "intel_batchbuffer.h"
+#include "intel_io.h"
+#include "intel_chipset.h"
+
+#define OBJECT_WIDTH	1280
+#define OBJECT_HEIGHT	720
+
+
+int vgem_fd;
+
+const char g_sys_card_path_format[] =
+"/sys/bus/platform/devices/vgem/drm/card%d";
+const char g_dev_card_path_format[] =
+"/dev/dri/card%d";
+
+static int drm_open_vgem(void) {
+	char *name;
+	int i, fd;
+
+	for (i = 0; i < 16; i++) {
+		struct stat _stat;
+		int ret;
+		ret = asprintf(&name, g_sys_card_path_format, i);
+		assert(ret != -1);
+
+		if (stat(name, &_stat) == -1) {
+			free(name);
+			continue;
+		}
+
+		free(name);
+		ret = asprintf(&name, g_dev_card_path_format, i);
+		assert(ret != -1);
+
+		fd = open(name, O_RDWR);
+		free(name);
+		if (fd == -1) {
+			continue;
+		}
+		return fd;
+	}
+	return -1;
+}
+
+static void *mmap_dumb_bo(int fd, int handle, size_t size) {
+	struct drm_mode_map_dumb mmap_arg;
+	void *ptr;
+	int ret;
+
+	memset(&mmap_arg, 0, sizeof(mmap_arg));
+
+	mmap_arg.handle = handle;
+
+	ret = drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &mmap_arg);
+	assert(ret == 0);
+	assert(mmap_arg.offset != 0);
+
+	ptr = mmap(NULL, size, (PROT_READ|PROT_WRITE), MAP_SHARED, fd,
+			mmap_arg.offset);
+
+	assert(ptr != MAP_FAILED);
+
+	return ptr;
+}
+
+	static double
+get_time_in_secs(void)
+{
+	struct timeval tv;
+
+	gettimeofday(&tv, NULL);
+
+	return (double)tv.tv_sec + tv.tv_usec / 1000000.0;
+}
+
+static void
+do_render(drm_intel_bufmgr *bufmgr, struct intel_batchbuffer *batch,
+	  drm_intel_bo *dst_bo, int width, int height)
+{
+	uint32_t *data;
+	drm_intel_bo *src_bo;
+	int i, prime_fd;
+	static uint32_t seed = 1;
+  int x = 0;
+	uint32_t vgem_bo;
+	uint32_t *bo_ptr;
+	volatile uint32_t *ptr;
+
+	src_bo = drm_intel_bo_alloc(bufmgr, "src", width * height * 4, 4096);
+
+	drm_intel_bo_gem_export_to_prime(src_bo, &prime_fd);
+	if (drmPrimeFDToHandle(vgem_fd, prime_fd, &vgem_bo)) {
+		fprintf(stderr, "failed to import handle\n");
+		return;
+	}
+
+	bo_ptr = mmap_dumb_bo(vgem_fd, vgem_bo, width * height * 4);
+	ptr = bo_ptr;
+
+	for (i = 0; i < width * height; i++) {
+		x = ptr[i];
+	}
+
+	munmap(bo_ptr, width * height * 4);
+
+	/* Render the junk to the dst. */
+	BLIT_COPY_BATCH_START(0);
+	OUT_BATCH((3 << 24) | /* 32 bits */
+		  (0xcc << 16) | /* copy ROP */
+		  (width * 4) /* dst pitch */);
+	OUT_BATCH(0); /* dst x1,y1 */
+	OUT_BATCH((height << 16) | width); /* dst x2,y2 */
+	OUT_RELOC(dst_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
+	OUT_BATCH(0); /* src x1,y1 */
+	OUT_BATCH(width * 4); /* src pitch */
+	OUT_RELOC(src_bo, I915_GEM_DOMAIN_RENDER, 0, 0);
+	ADVANCE_BATCH();
+
+	intel_batchbuffer_flush(batch);
+
+	drm_intel_bo_unreference(src_bo);
+}
+
+int main(int argc, char **argv)
+{
+	int fd;
+	int object_size = OBJECT_WIDTH * OBJECT_HEIGHT * 4;
+	double start_time, end_time;
+	drm_intel_bo *dst_bo;
+	drm_intel_bufmgr *bufmgr;
+	struct intel_batchbuffer *batch;
+	int i;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+
+	vgem_fd = drm_open_vgem();
+	if (vgem_fd < 0) {
+		fprintf(stderr, "failed to open vgem card\n");
+		close(fd);
+		return 1;
+	}
+
+	bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
+	drm_intel_bufmgr_gem_enable_reuse(bufmgr);
+
+	batch = intel_batchbuffer_alloc(bufmgr, intel_get_drm_devid(fd));
+
+	dst_bo = drm_intel_bo_alloc(bufmgr, "dst", object_size, 4096);
+
+	/* Prep loop to get us warmed up. */
+	for (i = 0; i < 60; i++) {
+		do_render(bufmgr, batch, dst_bo, OBJECT_WIDTH, OBJECT_HEIGHT);
+	}
+	drm_intel_bo_wait_rendering(dst_bo);
+
+	/* Do the actual timing. */
+	start_time = get_time_in_secs();
+	for (i = 0; i < 200; i++) {
+		do_render(bufmgr, batch, dst_bo, OBJECT_WIDTH, OBJECT_HEIGHT);
+	}
+	drm_intel_bo_wait_rendering(dst_bo);
+	end_time = get_time_in_secs();
+
+	printf("%d iterations in %.03f secs: %.01f MB/sec\n", i,
+	       end_time - start_time,
+	       (double)i * OBJECT_WIDTH * OBJECT_HEIGHT * 4 / 1024.0 / 1024.0 /
+	       (end_time - start_time));
+
+	intel_batchbuffer_free(batch);
+	drm_intel_bufmgr_destroy(bufmgr);
+
+	close(fd);
+
+	return 0;
+}