Add a simple test to execute n nop batches

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

.gitignore

@@ -34,6 +34,7 @@ tests/getclient
 tests/getstats
 tests/getversion
 tests/gem_basic
+tests/gem_exec_nop
 tests/gem_fence_thrash
 tests/gem_flink
 tests/gem_gtt_speed

tests/Makefile.am

@@ -2,6 +2,7 @@ TESTS = getversion \
 	getclient \
 	getstats \
 	gem_basic \
+	gem_exec_nop \
 	gem_flink \
 	gem_readwrite \
 	gem_ringfill \

tests/gem_exec_nop.c

@@ -0,0 +1,159 @@
+/*
+ * Copyright © 2011 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 <assert.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+
+#define MI_BATCH_BUFFER_END	(0xA<<23)
+
+static uint32_t gem_create(int fd, int size)
+{
+	struct drm_i915_gem_create create;
+
+	create.handle = 0;
+	create.size = size;
+	(void)drmIoctl(fd, DRM_IOCTL_I915_GEM_CREATE, &create);
+
+	return create.handle;
+}
+
+static int gem_write(int fd,
+		     uint32_t handle, uint32_t offset,
+		     const void *src, int length)
+{
+	struct drm_i915_gem_pwrite pwrite;
+
+	pwrite.handle = handle;
+	pwrite.offset = offset;
+	pwrite.size = length;
+	pwrite.data_ptr = (uintptr_t)src;
+	return drmIoctl(fd, DRM_IOCTL_I915_GEM_PWRITE, &pwrite);
+}
+
+static void gem_close(int fd, uint32_t handle)
+{
+	struct drm_gem_close close;
+
+	close.handle = handle;
+	(void)drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, &close);
+}
+
+static void gem_sync(int fd, uint32_t handle)
+{
+	struct drm_i915_gem_set_domain set_domain;
+
+	set_domain.handle = handle;
+	set_domain.read_domains = I915_GEM_DOMAIN_GTT;
+	set_domain.write_domain = I915_GEM_DOMAIN_GTT;
+
+	drmIoctl(fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain);
+}
+
+static double elapsed(const struct timeval *start,
+		      const struct timeval *end,
+		      int loop)
+{
+	return (1e6*(end->tv_sec - start->tv_sec) + (end->tv_usec - start->tv_usec))/loop;
+}
+
+static void exec(int fd, uint32_t handle, int loops)
+{
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec[1];
+	int ret;
+
+	exec[0].handle = handle;
+	exec[0].relocation_count = 0;
+	exec[0].relocs_ptr = 0;
+	exec[0].alignment = 0;
+	exec[0].offset = 0;
+	exec[0].flags = 0;
+	exec[0].rsvd1 = 0;
+	exec[0].rsvd2 = 0;
+
+	execbuf.buffers_ptr = (uintptr_t)exec;
+	execbuf.buffer_count = 1;
+	execbuf.batch_start_offset = 0;
+	execbuf.batch_len = 8;
+	execbuf.cliprects_ptr = 0;
+	execbuf.num_cliprects = 0;
+	execbuf.DR1 = 0;
+	execbuf.DR4 = 0;
+	execbuf.flags = 0;
+	execbuf.rsvd1 = 0;
+	execbuf.rsvd2 = 0;
+
+	while (loops--) {
+		ret = drmIoctl(fd,
+			       DRM_IOCTL_I915_GEM_EXECBUFFER2,
+			       &execbuf);
+	}
+	gem_sync(fd, handle);
+}
+
+int main(int argc, char **argv)
+{
+	uint32_t batch[2] = {MI_BATCH_BUFFER_END};
+	uint32_t handle;
+	int count;
+	int fd;
+
+	fd = drm_open_any();
+
+	handle = gem_create(fd, 4096);
+	gem_write(fd, handle, 0, batch, sizeof(batch));
+
+	for (count = 1; count <= 1<<17; count <<= 1) {
+		struct timeval start, end;
+
+		gettimeofday(&start, NULL);
+		exec(fd, handle, count);
+		gettimeofday(&end, NULL);
+		printf("Time to exec x %d:		%7.3fµs\n",
+		       count, elapsed(&start, &end, count));
+		fflush(stdout);
+	}
+	gem_close(fd, handle);
+
+	close(fd);
+
+	return 0;
+}