1 /*
2 * Copyright © 2015 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
24 /** @file kms_vblank.c
25 *
26 * This is a test of performance of drmWaitVblank.
27 */
28
29 #include <stdlib.h>
30 #include <stdio.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <fcntl.h>
34 #include <inttypes.h>
35 #include <errno.h>
36 #include <time.h>
37 #include <sys/stat.h>
38 #include <sys/time.h>
39 #include <sys/wait.h>
40
41 #include <drm.h>
42 #include <xf86drm.h>
43 #include "drmtest.h"
44 #include "assert.h"
45
elapsed(const struct timespec * start,const struct timespec * end,int loop)46 static double elapsed(const struct timespec *start,
47 const struct timespec *end,
48 int loop)
49 {
50 return (1e6*(end->tv_sec - start->tv_sec) + (end->tv_nsec - start->tv_nsec)/1000)/loop;
51 }
52
crtc0_active(int fd)53 static int crtc0_active(int fd)
54 {
55 union drm_wait_vblank vbl;
56
57 memset(&vbl, 0, sizeof(vbl));
58 vbl.request.type = DRM_VBLANK_RELATIVE;
59 return drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl) == 0;
60 }
61
vblank_query(int fd,int busy)62 static void vblank_query(int fd, int busy)
63 {
64 union drm_wait_vblank vbl;
65 struct timespec start, end;
66 unsigned long seq, count = 0;
67 struct drm_event_vblank event;
68
69 memset(&vbl, 0, sizeof(vbl));
70
71 if (busy) {
72 vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT;
73 vbl.request.sequence = 120 + 12;
74 drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
75 }
76
77 vbl.request.type = DRM_VBLANK_RELATIVE;
78 vbl.request.sequence = 0;
79 drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
80 seq = vbl.reply.sequence;
81
82 clock_gettime(CLOCK_MONOTONIC, &start);
83 do {
84 vbl.request.type = DRM_VBLANK_RELATIVE;
85 vbl.request.sequence = 0;
86 drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
87 count++;
88 } while ((vbl.reply.sequence - seq) <= 120);
89 clock_gettime(CLOCK_MONOTONIC, &end);
90
91 printf("%f\n", 1e6/elapsed(&start, &end, count));
92 if (busy)
93 assert(read(fd, &event, sizeof(event)) != -1);
94 }
95
vblank_event(int fd,int busy)96 static void vblank_event(int fd, int busy)
97 {
98 union drm_wait_vblank vbl;
99 struct timespec start, end;
100 unsigned long seq, count = 0;
101 struct drm_event_vblank event;
102
103 memset(&vbl, 0, sizeof(vbl));
104
105 if (busy) {
106 vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT;
107 vbl.request.sequence = 120 + 12;
108 drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
109 }
110
111 vbl.request.type = DRM_VBLANK_RELATIVE;
112 vbl.request.sequence = 0;
113 drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
114 seq = vbl.reply.sequence;
115
116 clock_gettime(CLOCK_MONOTONIC, &start);
117 do {
118 vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT;
119 vbl.request.sequence = 0;
120 drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
121
122 assert(read(fd, &event, sizeof(event)) != -1);
123 count++;
124 } while ((event.sequence - seq) <= 120);
125 clock_gettime(CLOCK_MONOTONIC, &end);
126
127 printf("%f\n", 1e6/elapsed(&start, &end, count));
128 if (busy)
129 assert(read(fd, &event, sizeof(event)) != -1);
130 }
131
main(int argc,char ** argv)132 int main(int argc, char **argv)
133 {
134 int fd, c;
135 int busy = 0, loops = 5;
136 enum what { EVENTS, QUERIES } what = EVENTS;
137
138 while ((c = getopt (argc, argv, "b:w:r:")) != -1) {
139 switch (c) {
140 case 'b':
141 if (strcmp(optarg, "busy") == 0)
142 busy = 1;
143 else if (strcmp(optarg, "idle") == 0)
144 busy = 0;
145 else
146 abort();
147 break;
148
149 case 'w':
150 if (strcmp(optarg, "event") == 0)
151 what = EVENTS;
152 else if (strcmp(optarg, "query") == 0)
153 what = QUERIES;
154 else
155 abort();
156 break;
157 case 'r':
158 loops = atoi(optarg);
159 if (loops < 1)
160 loops = 1;
161 }
162 }
163
164 fd = drm_open_driver(DRIVER_INTEL);
165 if (!crtc0_active(fd)) {
166 fprintf(stderr, "CRTC/pipe 0 not active\n");
167 return 77;
168 }
169
170 while (loops--) {
171 switch (what) {
172 case EVENTS:
173 vblank_event(fd, busy);
174 break;
175 case QUERIES:
176 vblank_query(fd, busy);
177 break;
178 }
179 }
180 return 0;
181 }
182