Add a simple test to execute n nop batches
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/tests/gem_exec_nop.c b/tests/gem_exec_nop.c
new file mode 100644
index 0000000..d022c2b
--- /dev/null
+++ b/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;
+}