Commit 0e1f5e3e authored by Chris Wilson's avatar Chris Wilson

benchmarks: Add vgem mmap speed test

Primarily to check that we have the WC read/write disparity.
Signed-off-by: Chris Wilson's avatarChris Wilson <chris@chris-wilson.co.uk>
parent c344044a
......@@ -15,4 +15,5 @@ intel_upload_blit_large_gtt
intel_upload_blit_large_map
intel_upload_blit_small
kms_vblank
vgem_mmap
# Please keep sorted alphabetically
......@@ -19,4 +19,5 @@ benchmarks_PROGRAMS = \
gem_syslatency \
gem_userptr_benchmark \
kms_vblank \
vgem_mmap \
$(NULL)
[ -e $IGT_BENCHMARKS/vgem_mmap ] || return 1
sudo -n true || return 1
for i in fault clear write read; do
name="vgem:mmap::$i"
test_name="$test_name $name"
eval "${name}_run() { sudo $IGT_BENCHMARKS/vgem_mmap -d $i -r \$1 ; } "
done
test_exec_time=2
/*
* Copyright ©2016 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.
*
*/
#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 "igt.h"
#include "igt_vgem.h"
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);
}
int main(int argc, char **argv)
{
enum dir {READ, WRITE, CLEAR, FAULT} dir = READ;
struct timespec start, end;
struct vgem_bo bo;
void *buf;
void *ptr, *src, *dst;
int reps = 1;
int loops;
int vgem;
int c;
while ((c = getopt (argc, argv, "d:r:")) != -1) {
switch (c) {
case 'd':
if (strcmp(optarg, "read") == 0)
dir = READ;
else if (strcmp(optarg, "write") == 0)
dir = WRITE;
else if (strcmp(optarg, "clear") == 0)
dir = CLEAR;
else if (strcmp(optarg, "fault") == 0)
dir = FAULT;
else
abort();
break;
case 'r':
reps = atoi(optarg);
if (reps < 1)
reps = 1;
break;
default:
break;
}
}
vgem = drm_open_driver(DRIVER_VGEM);
bo.width = 2024;
bo.height = 2024;
bo.bpp = 4;
vgem_create(vgem, &bo);
ptr = vgem_mmap(vgem, &bo, PROT_WRITE);
buf = malloc(bo.size);
if (dir == READ) {
src = ptr;
dst = buf;
} else {
src = buf;
dst = ptr;
}
clock_gettime(CLOCK_MONOTONIC, &start);
switch (dir) {
case CLEAR:
case FAULT:
memset(dst, 0, bo.size);
break;
default:
memcpy(dst, src, bo.size);
break;
}
clock_gettime(CLOCK_MONOTONIC, &end);
loops = 2 / elapsed(&start, &end);
while (reps--) {
clock_gettime(CLOCK_MONOTONIC, &start);
for (c = 0; c < loops; c++) {
int page;
switch (dir) {
case CLEAR:
memset(dst, 0, bo.size);
break;
case FAULT:
munmap(ptr, bo.size);
ptr = vgem_mmap(vgem, &bo, PROT_WRITE);
for (page = 0; page < bo.size; page += 4096) {
uint32_t *x = (uint32_t *)ptr + page/4;
__asm__ __volatile__("": : :"memory");
page += *x; /* should be zero! */
}
break;
default:
memcpy(dst, src, bo.size);
break;
}
}
clock_gettime(CLOCK_MONOTONIC, &end);
printf("%7.3f\n", bo.size / elapsed(&start, &end) * loops / (1024*1024));
}
return 0;
}
......@@ -48,15 +48,14 @@ static void test_read(int vgem, int i915)
for (i = 0; i < 1024; i++)
ptr[1024*i] = i;
munmap(ptr, scratch.size);
gem_close(vgem, scratch.handle);
for (i = 0; i < 1024; i++) {
uint32_t tmp;
gem_read(i915, handle, 4096*i, &tmp, sizeof(tmp));
igt_assert_eq(tmp, i);
}
gem_close(i915, handle);
gem_close(vgem, scratch.handle);
}
static void test_write(int vgem, int i915)
......@@ -75,16 +74,16 @@ static void test_write(int vgem, int i915)
handle = prime_fd_to_handle(i915, dmabuf);
close(dmabuf);
ptr = vgem_mmap(vgem, &scratch, PROT_READ);
gem_close(vgem, scratch.handle);
for (i = 0; i < 1024; i++)
gem_write(i915, handle, 4096*i, &i, sizeof(i));
gem_close(i915, handle);
ptr = vgem_mmap(vgem, &scratch, PROT_READ);
for (i = 0; i < 1024; i++)
igt_assert_eq(ptr[1024*i], i);
munmap(ptr, scratch.size);
gem_close(i915, handle);
gem_close(vgem, scratch.handle);
}
static void test_gtt(int vgem, int i915)
......
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