summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorChris Wilson <chris@chris-wilson.co.uk>2010-12-23 12:44:51 +0000
committerChris Wilson <chris@chris-wilson.co.uk>2010-12-23 12:47:17 +0000
commitf19a1942c2a3da4b65dff029ecfd9d20a132765d (patch)
treeed36d9c12e86267985b960628f562486468866a9
parent322563027cabbdbd21c1ecee4cec4b89b3028ce6 (diff)
Add a GTT timing test
Using for diagnosing some mysterious slowdowns. Should include a variant for basic benchmarking... Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
-rw-r--r--.gitignore1
-rw-r--r--tests/Makefile.am4
-rw-r--r--tests/gem_gtt_speed.c236
3 files changed, 240 insertions, 1 deletions
diff --git a/.gitignore b/.gitignore
index cbb4f0db..26586e4f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,6 +36,7 @@ tests/getversion
tests/gem_basic
tests/gem_fence_thrash
tests/gem_flink
+tests/gem_gtt_speed
tests/gem_largeobject
tests/gem_mmap
tests/gem_pread_after_blit
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 2bdc3dfd..95eaa4af 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -14,7 +14,9 @@ TESTS = getversion \
gem_bad_blit \
gem_bad_batch \
gem_hang \
- gem_fence_thrash
+ gem_fence_thrash \
+ gem_gtt_speed \
+ $(NULL)
EXTRA_PROGRAMS = $(TESTS)
CLEANFILES = $(EXTRA_PROGRAMS)
diff --git a/tests/gem_gtt_speed.c b/tests/gem_gtt_speed.c
new file mode 100644
index 00000000..af9f9478
--- /dev/null
+++ b/tests/gem_gtt_speed.c
@@ -0,0 +1,236 @@
+/*
+ * Copyright © 2010 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>
+ * 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 OBJECT_SIZE 16384
+
+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 void *gem_mmap(int fd, uint32_t handle, int size, int prot)
+{
+ struct drm_i915_gem_mmap_gtt mmap_arg;
+ void *ptr;
+
+ mmap_arg.handle = handle;
+ if (drmIoctl(fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg))
+ return NULL;
+
+ ptr = mmap(0, size, prot, MAP_SHARED, fd, mmap_arg.offset);
+ if (ptr == MAP_FAILED)
+ ptr = NULL;
+
+ return ptr;
+}
+
+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 int gem_read(int fd,
+ uint32_t handle, uint32_t offset,
+ const void *src, int length)
+{
+ struct drm_i915_gem_pread pread;
+
+ pread.handle = handle;
+ pread.offset = offset;
+ pread.size = length;
+ pread.data_ptr = (uintptr_t)src;
+ return drmIoctl(fd, DRM_IOCTL_I915_GEM_PREAD, &pread);
+}
+
+static void gem_set_tiling(int fd, uint32_t handle, int tiling)
+{
+ struct drm_i915_gem_set_tiling set_tiling;
+ int ret;
+
+ do {
+ set_tiling.handle = handle;
+ set_tiling.tiling_mode = tiling;
+ set_tiling.stride = 512;
+
+ ret = ioctl(fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
+ } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
+}
+
+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 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;
+}
+
+int main(int argc, char **argv)
+{
+ struct timeval start, end;
+ uint8_t buf[OBJECT_SIZE];
+ uint32_t handle;
+ int loop, i, tiling;
+ int fd;
+
+ fd = drm_open_any();
+
+ handle = gem_create(fd, OBJECT_SIZE);
+ assert(handle);
+
+ for (tiling = I915_TILING_NONE; tiling <= I915_TILING_Y; tiling++) {
+ if (tiling != I915_TILING_NONE) {
+ printf("\nSetting tiling mode to %s\n",
+ tiling == I915_TILING_X ? "X" : "Y");
+ gem_set_tiling(fd, handle, tiling);
+ }
+
+ if (tiling == I915_TILING_NONE) {
+ /* CPU pwrite */
+ gettimeofday(&start, NULL);
+ for (loop = 0; loop < 1000; loop++)
+ gem_write(fd, handle, 0, buf, sizeof(buf));
+ gettimeofday(&end, NULL);
+ printf("Time to pwrite 16k through the CPU: %7.3fµs\n",
+ elapsed(&start, &end, loop));
+
+ /* CPU pread */
+ gettimeofday(&start, NULL);
+ for (loop = 0; loop < 1000; loop++)
+ gem_read(fd, handle, 0, buf, sizeof(buf));
+ gettimeofday(&end, NULL);
+ printf("Time to pread 16k through the CPU: %7.3fµs\n",
+ elapsed(&start, &end, loop));
+ }
+
+ /* mmap read */
+ gettimeofday(&start, NULL);
+ for (loop = 0; loop < 1000; loop++) {
+ volatile uint32_t *ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ);
+ int x = 0;
+
+ for (i = 0; i < OBJECT_SIZE/sizeof(*ptr); i++)
+ x += ptr[i];
+
+ munmap((void *)ptr, OBJECT_SIZE);
+ }
+ gettimeofday(&end, NULL);
+ printf("Time to read 16k through a GTT map: %7.3fµs\n",
+ elapsed(&start, &end, loop));
+
+ /* mmap write */
+ gettimeofday(&start, NULL);
+ for (loop = 0; loop < 1000; loop++) {
+ volatile uint32_t *ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+
+ for (i = 0; i < OBJECT_SIZE/sizeof(*ptr); i++)
+ ptr[i] = i;
+
+ munmap((void *)ptr, OBJECT_SIZE);
+ }
+ gettimeofday(&end, NULL);
+ printf("Time to write 16k through a GTT map: %7.3fµs\n",
+ elapsed(&start, &end, loop));
+
+ /* mmap read */
+ gettimeofday(&start, NULL);
+ for (loop = 0; loop < 1000; loop++) {
+ volatile uint32_t *ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ);
+ int x = 0;
+
+ for (i = 0; i < OBJECT_SIZE/sizeof(*ptr); i++)
+ x += ptr[i];
+
+ munmap((void *)ptr, OBJECT_SIZE);
+ }
+ gettimeofday(&end, NULL);
+ printf("Time to read 16k (again) through a GTT map: %7.3fµs\n",
+ elapsed(&start, &end, loop));
+
+ if (tiling == I915_TILING_NONE) {
+ /* GTT pwrite */
+ gettimeofday(&start, NULL);
+ for (loop = 0; loop < 1000; loop++)
+ gem_write(fd, handle, 0, buf, sizeof(buf));
+ gettimeofday(&end, NULL);
+ printf("Time to pwrite 16k through the GTT: %7.3fµs\n",
+ elapsed(&start, &end, loop));
+
+ /* GTT pread */
+ gettimeofday(&start, NULL);
+ for (loop = 0; loop < 1000; loop++)
+ gem_read(fd, handle, 0, buf, sizeof(buf));
+ gettimeofday(&end, NULL);
+ printf("Time to pread 16k through the GTT: %7.3fµs\n",
+ elapsed(&start, &end, loop));
+ }
+
+ }
+
+ gem_close(fd, handle);
+ close(fd);
+
+ return 0;
+}