tests/gem_pwrite.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Chris Wilson <chris@chris-wilson.co.uk>
  25  *
  26  */
  27
  28 #include <unistd.h>
  29 #include <stdlib.h>
  30 #include <stdint.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <assert.h>
  34 #include <fcntl.h>
  35 #include <inttypes.h>
  36 #include <errno.h>
  37 #include <sys/stat.h>
  38 #include <sys/ioctl.h>
  39 #include <sys/mman.h>
  40 #include <sys/time.h>
  41 #include "drm.h"
  42 #include "i915_drm.h"
  43 #include "drmtest.h"
  44
  45 #define OBJECT_SIZE 16384
  46
  47 #define COPY_BLT_CMD            (2<<29|0x53<<22|0x6)
  48 #define BLT_WRITE_ALPHA         (1<<21)
  49 #define BLT_WRITE_RGB           (1<<20)
  50 #define BLT_SRC_TILED           (1<<15)
  51 #define BLT_DST_TILED           (1<<11)
  52
  53 static void do_gem_write(int fd, uint32_t handle, void *buf, int len, int loops)
  54 {
  55         while (loops--)
  56                 gem_write(fd, handle, 0, buf, len);
  57 }
  58
  59 static double elapsed(const struct timeval *start,
  60                       const struct timeval *end,
  61                       int loop)
  62 {
  63         return (1e6*(end->tv_sec - start->tv_sec) + (end->tv_usec - start->tv_usec))/loop;
  64 }
  65
  66 static const char *bytes_per_sec(char *buf, double v)
  67 {
  68         const char *order[] = {
  69                 "",
  70                 "KiB",
  71                 "MiB",
  72                 "GiB",
  73                 "TiB",
  74                 NULL,
  75         }, **o = order;
  76
  77         while (v > 1000 && o[1]) {
  78                 v /= 1000;
  79                 o++;
  80         }
  81         sprintf(buf, "%.1f%s/s", v, *o);
  82         return buf;
  83 }
  84
  85
  86 int main(int argc, char **argv)
  87 {
  88         int object_size = 0;
  89         uint32_t buf[20];
  90         uint32_t *src, dst;
  91         int fd, count;
  92         const struct {
  93                 int level;
  94                 const char *name;
  95         } cache[] = {
  96                 { 0, "uncached" },
  97                 { 1, "snoop" },
  98                 { 2, "display" },
  99                 { -1 },
 100         }, *c;
 101
 102         igt_skip_on_simulation();
 103
 104         igt_subtest_init(argc, argv);
 105         igt_skip_on_simulation();
 106
 107         if (argc > 1 && atoi(argv[1]))
 108                 object_size = atoi(argv[1]);
 109         if (object_size == 0)
 110                 object_size = OBJECT_SIZE;
 111         object_size = (object_size + 3) & -4;
 112
 113         fd = drm_open_any();
 114
 115         dst = gem_create(fd, object_size);
 116         src = malloc(object_size);
 117
 118         igt_subtest("normal") {
 119                 for (count = 1; count <= 1<<17; count <<= 1) {
 120                         struct timeval start, end;
 121
 122                         gettimeofday(&start, NULL);
 123                         do_gem_write(fd, dst, src, object_size, count);
 124                         gettimeofday(&end, NULL);
 125                         printf("Time to pwrite %d bytes x %6d:  %7.3fµs, %s\n",
 126                                object_size, count,
 127                                elapsed(&start, &end, count),
 128                                bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
 129                         fflush(stdout);
 130                 }
 131         }
 132
 133         for (c = cache; c->level != -1; c++) {
 134                 igt_subtest(c->name) {
 135                         gem_set_caching(fd, dst, c->level);
 136
 137                         for (count = 1; count <= 1<<17; count <<= 1) {
 138                                 struct timeval start, end;
 139
 140                                 gettimeofday(&start, NULL);
 141                                 do_gem_write(fd, dst, src, object_size, count);
 142                                 gettimeofday(&end, NULL);
 143                                 printf("Time to %s pwrite %d bytes x %6d:       %7.3fµs, %s\n",
 144                                        c->name, object_size, count,
 145                                        elapsed(&start, &end, count),
 146                                        bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
 147                                 fflush(stdout);
 148                         }
 149                 }
 150         }
 151
 152         free(src);
 153         gem_close(fd, dst);
 154
 155         close(fd);
 156
 157         igt_exit();
 158 }