Commit f19a1942 authored by Chris Wilson's avatar Chris Wilson 🤔

Add a GTT timing test

Using for diagnosing some mysterious slowdowns. Should include a variant
for basic benchmarking...
Signed-off-by: Chris Wilson's avatarChris Wilson <chris@chris-wilson.co.uk>
parent 32256302
......@@ -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
......
......@@ -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)
......
/*
* 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;
}
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