benchmark: Measure allocation time for objects
A basic measurement, how fast can we create and populate an object with
backing storage?
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/benchmarks/gem_create.c b/benchmarks/gem_create.c
new file mode 100644
index 0000000..21e8d86
--- /dev/null
+++ b/benchmarks/gem_create.c
@@ -0,0 +1,176 @@
+/*
+ * 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)
+
+#define LOCAL_I915_EXEC_NO_RELOC (1<<11)
+#define LOCAL_I915_EXEC_HANDLE_LUT (1<<12)
+
+static int __gem_execbuf(int fd, struct drm_i915_gem_execbuffer2 *execbuf)
+{
+ int err = 0;
+ if (drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, execbuf))
+ err = -errno;
+ return err;
+}
+
+
+static double elapsed(const struct timespec *start,
+ const struct timespec *end)
+{
+ return (end->tv_sec - start->tv_sec) + 1e-9*(end->tv_nsec - start->tv_nsec);
+}
+
+static void make_busy(int fd, uint32_t handle)
+{
+ struct drm_i915_gem_execbuffer2 execbuf;
+ struct drm_i915_gem_exec_object2 gem_exec;
+
+ const uint32_t buf[] = {MI_BATCH_BUFFER_END};
+ gem_write(fd, handle, 0, buf, sizeof(buf));
+
+ memset(&gem_exec, 0, sizeof(gem_exec));
+ gem_exec.handle = handle;
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = (uintptr_t)&gem_exec;
+ execbuf.buffer_count = 1;
+ execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
+ execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;
+ if (__gem_execbuf(fd, &execbuf)) {
+ execbuf.flags = 0;
+ gem_execbuf(fd, &execbuf);
+ }
+}
+
+int main(int argc, char **argv)
+{
+ int fd = drm_open_any();
+ int size = 0;
+ int busy = 0;
+ int reps = 13;
+ int c, n, s;
+
+ while ((c = getopt (argc, argv, "bs:r:")) != -1) {
+ switch (c) {
+ case 's':
+ size = atoi(optarg);
+ break;
+
+ case 'r':
+ reps = atoi(optarg);
+ if (reps < 1)
+ reps = 1;
+ break;
+
+ case 'b':
+ busy = true;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (size == 0) {
+ for (s = 4096; s <= OBJECT_SIZE; s <<= 1) {
+ igt_stats_t stats;
+
+ igt_stats_init_with_size(&stats, reps);
+ for (n = 0; n < reps; n++) {
+ struct timespec start, end;
+ uint64_t count = 0;
+
+ clock_gettime(CLOCK_MONOTONIC, &start);
+ do {
+ for (c = 0; c < 1000; c++) {
+ uint32_t handle;
+
+ handle = gem_create(fd, s);
+ gem_set_domain(fd, handle,
+ I915_GEM_DOMAIN_GTT,
+ I915_GEM_DOMAIN_GTT);
+ if (busy)
+ make_busy(fd, handle);
+ gem_close(fd, handle);
+ }
+ count += c;
+ clock_gettime(CLOCK_MONOTONIC, &end);
+ } while (end.tv_sec - start.tv_sec < 2);
+
+ igt_stats_push_float(&stats, count / elapsed(&start, &end));
+ }
+ printf("%f\n", igt_stats_get_trimean(&stats));
+ igt_stats_fini(&stats);
+ }
+ } else {
+ for (n = 0; n < reps; n++) {
+ struct timespec start, end;
+ uint64_t count = 0;
+
+ clock_gettime(CLOCK_MONOTONIC, &start);
+ do {
+ for (c = 0; c < 1000; c++) {
+ uint32_t handle;
+
+ handle = gem_create(fd, size);
+ gem_set_domain(fd, handle,
+ I915_GEM_DOMAIN_GTT,
+ I915_GEM_DOMAIN_GTT);
+ if (busy)
+ make_busy(fd, handle);
+ gem_close(fd, handle);
+ }
+ count += c;
+ clock_gettime(CLOCK_MONOTONIC, &end);
+ } while (end.tv_sec - start.tv_sec < 2);
+
+ printf("%f\n", count / elapsed(&start, &end));
+ }
+ }
+
+ return 0;
+}