2 * Copyright © 2012 Intel Corporation
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:
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
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
24 * Ben Widawsky <ben@bwidawsk.net>
37 #define NUMBER_OF_RC6_RESIDENCY 3
38 #define SLEEP_DURATION 3000 // in milliseconds
39 #define RC6_FUDGE 900 // in milliseconds
41 static unsigned int readit(const char *path)
47 file = fopen(path, "r");
49 scanned = fscanf(file, "%u", &ret);
50 igt_assert(scanned == 1);
57 static void read_rc6_residency( int value[], const char *name_of_rc6_residency[])
60 const int device = drm_get_card();
65 /* For some reason my ivb isn't idle even after syncing up with the gpu.
66 * Let's add a sleept just to make it happy. */
69 ret = asprintf(&path, "/sys/class/drm/card%d/power/rc6_enable", device);
70 igt_assert(ret != -1);
72 file = fopen(path, "r");
75 /* claim success if no rc6 enabled. */
76 if (readit(path) == 0)
79 for(i = 0; i < 6; i++)
82 sleep(SLEEP_DURATION / 1000);
83 ret = asprintf(&path, "/sys/class/drm/card%d/power/%s_residency_ms",device,name_of_rc6_residency[i % 3]);
84 igt_assert(ret != -1);
85 value[i] = readit(path);
90 static void rc6_residency_counter(int value[],const char *name_of_rc6_residency[])
93 unsigned int flag_counter,flag_support;
94 double counter_result = 0;
98 for(flag = NUMBER_OF_RC6_RESIDENCY-1; flag >= 0; flag --)
100 unsigned int tmp_counter, tmp_support;
102 counter = ((double)value[flag + 3] - (double)value[flag]) /(double) SLEEP_DURATION;
105 counter_result = counter;
111 if( value [flag + 3] == 0){
113 igt_info("This machine doesn't support %s\n", name_of_rc6_residency[flag]);
118 flag_counter = flag_counter + tmp_counter;
119 flag_counter = flag_counter << 1;
121 flag_support = flag_support + tmp_support;
122 flag_support = flag_support << 1;
125 igt_info("The residency counter: %f \n", counter_result);
127 igt_skip_on_f(flag_support == 0 , "This machine didn't entry any RC6 state.\n");
128 igt_assert_f((flag_counter != 0) && (counter_result <=1) , "Sysfs RC6 residency counter is inaccurate.\n");
130 igt_info("This machine entry %s state.\n", name_of_rc6_residency[(flag_counter / 2) - 1]);
133 static void rc6_residency_check(int value[])
136 diff = (value[3] - value[0]) +
137 (value[4] - value[1]) +
138 (value[5] - value[2]);
140 igt_assert_f(diff <= (SLEEP_DURATION + RC6_FUDGE),"Diff was too high. That is unpossible\n");
141 igt_assert_f(diff >= (SLEEP_DURATION - RC6_FUDGE),"GPU was not in RC6 long enough. Check that "
142 "the GPU is as idle as possible(ie. no X, "
143 "running and running no other tests)\n");
150 const char *name_of_rc6_residency[3]={"rc6","rc6p","rc6pp"};
152 igt_skip_on_simulation();
154 /* Use drm_open_any to verify device existence */
159 read_rc6_residency(value, name_of_rc6_residency);
162 igt_subtest("rc6-residency-check")
163 rc6_residency_check(value);
165 igt_subtest("rc6-residency-counter")
166 rc6_residency_counter(value, name_of_rc6_residency);