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144 lines
3.4 KiB
144 lines
3.4 KiB
/*
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* Copyright ©2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <time.h>
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#include "igt.h"
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#include "igt_vgem.h"
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static double elapsed(const struct timespec *start,
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const struct timespec *end)
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{
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return (end->tv_sec - start->tv_sec) + 1e-9*(end->tv_nsec - start->tv_nsec);
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}
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int main(int argc, char **argv)
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{
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enum dir {READ, WRITE, CLEAR, FAULT} dir = READ;
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struct timespec start, end;
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struct vgem_bo bo;
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void *buf;
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void *ptr, *src, *dst;
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int reps = 1;
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int loops;
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int vgem;
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int c;
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while ((c = getopt (argc, argv, "d:r:")) != -1) {
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switch (c) {
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case 'd':
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if (strcmp(optarg, "read") == 0)
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dir = READ;
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else if (strcmp(optarg, "write") == 0)
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dir = WRITE;
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else if (strcmp(optarg, "clear") == 0)
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dir = CLEAR;
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else if (strcmp(optarg, "fault") == 0)
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dir = FAULT;
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else
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abort();
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break;
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case 'r':
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reps = atoi(optarg);
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if (reps < 1)
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reps = 1;
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break;
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default:
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break;
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}
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}
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vgem = drm_open_driver(DRIVER_VGEM);
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bo.width = 2024;
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bo.height = 2024;
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bo.bpp = 4;
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vgem_create(vgem, &bo);
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ptr = vgem_mmap(vgem, &bo, PROT_WRITE);
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buf = malloc(bo.size);
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if (dir == READ) {
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src = ptr;
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dst = buf;
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} else {
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src = buf;
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dst = ptr;
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}
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clock_gettime(CLOCK_MONOTONIC, &start);
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switch (dir) {
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case CLEAR:
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case FAULT:
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memset(dst, 0, bo.size);
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break;
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default:
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memcpy(dst, src, bo.size);
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break;
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}
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clock_gettime(CLOCK_MONOTONIC, &end);
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loops = 2 / elapsed(&start, &end);
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while (reps--) {
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clock_gettime(CLOCK_MONOTONIC, &start);
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for (c = 0; c < loops; c++) {
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int page;
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switch (dir) {
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case CLEAR:
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memset(dst, 0, bo.size);
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break;
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case FAULT:
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munmap(ptr, bo.size);
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ptr = vgem_mmap(vgem, &bo, PROT_WRITE);
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for (page = 0; page < bo.size; page += 4096) {
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uint32_t *x = (uint32_t *)ptr + page/4;
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__asm__ __volatile__("": : :"memory");
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page += *x; /* should be zero! */
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}
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break;
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default:
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memcpy(dst, src, bo.size);
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break;
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}
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}
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clock_gettime(CLOCK_MONOTONIC, &end);
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printf("%7.3f\n", bo.size / elapsed(&start, &end) * loops / (1024*1024));
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}
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return 0;
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}
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