1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* Copyright 2015 Advanced Micro Devices, Inc.
*
* 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.
*
* Authors: Marek Olšák <maraeo@gmail.com>
*
*/
/* The GPU load is measured as follows.
*
* There is a thread which samples the GRBM_STATUS register at a certain
* frequency and the "busy" or "idle" counter is incremented based on
* whether the GUI_ACTIVE bit is set or not.
*
* Then, the user can sample the counters twice and calculate the average
* GPU load between the two samples.
*/
#include "r600_pipe_common.h"
#include "os/os_time.h"
/* For good accuracy at 1000 fps or lower. This will be inaccurate for higher
* fps (there are too few samples per frame). */
#define SAMPLES_PER_SEC 10000
#define GRBM_STATUS 0x8010
#define GUI_ACTIVE(x) (((x) >> 31) & 0x1)
static bool r600_is_gpu_busy(struct r600_common_screen *rscreen)
{
uint32_t value = 0;
rscreen->ws->read_registers(rscreen->ws, GRBM_STATUS, 1, &value);
return GUI_ACTIVE(value);
}
static PIPE_THREAD_ROUTINE(r600_gpu_load_thread, param)
{
struct r600_common_screen *rscreen = (struct r600_common_screen*)param;
const int period_us = 1000000 / SAMPLES_PER_SEC;
int sleep_us = period_us;
int64_t cur_time, last_time = os_time_get();
while (!p_atomic_read(&rscreen->gpu_load_stop_thread)) {
if (sleep_us)
os_time_sleep(sleep_us);
/* Make sure we sleep the ideal amount of time to match
* the expected frequency. */
cur_time = os_time_get();
if (os_time_timeout(last_time, last_time + period_us,
cur_time))
sleep_us = MAX2(sleep_us - 1, 1);
else
sleep_us += 1;
/*printf("Hz: %.1f\n", 1000000.0 / (cur_time - last_time));*/
last_time = cur_time;
/* Update the counters. */
if (r600_is_gpu_busy(rscreen))
p_atomic_inc(&rscreen->gpu_load_counter_busy);
else
p_atomic_inc(&rscreen->gpu_load_counter_idle);
}
p_atomic_dec(&rscreen->gpu_load_stop_thread);
return 0;
}
void r600_gpu_load_kill_thread(struct r600_common_screen *rscreen)
{
if (!rscreen->gpu_load_thread)
return;
p_atomic_inc(&rscreen->gpu_load_stop_thread);
pipe_thread_wait(rscreen->gpu_load_thread);
rscreen->gpu_load_thread = 0;
}
static uint64_t r600_gpu_load_read_counter(struct r600_common_screen *rscreen)
{
/* Start the thread if needed. */
if (!rscreen->gpu_load_thread) {
pipe_mutex_lock(rscreen->gpu_load_mutex);
/* Check again inside the mutex. */
if (!rscreen->gpu_load_thread)
rscreen->gpu_load_thread =
pipe_thread_create(r600_gpu_load_thread, rscreen);
pipe_mutex_unlock(rscreen->gpu_load_mutex);
}
/* The busy counter is in the lower 32 bits.
* The idle counter is in the upper 32 bits. */
return p_atomic_read(&rscreen->gpu_load_counter_busy) |
((uint64_t)p_atomic_read(&rscreen->gpu_load_counter_idle) << 32);
}
/**
* Just return the counters.
*/
uint64_t r600_gpu_load_begin(struct r600_common_screen *rscreen)
{
return r600_gpu_load_read_counter(rscreen);
}
unsigned r600_gpu_load_end(struct r600_common_screen *rscreen, uint64_t begin)
{
uint64_t end = r600_gpu_load_read_counter(rscreen);
unsigned busy = (end & 0xffffffff) - (begin & 0xffffffff);
unsigned idle = (end >> 32) - (begin >> 32);
/* Calculate the GPU load.
*
* If no counters have been incremented, return the current load.
* It's for the case when the load is queried faster than
* the counters are updated.
*/
if (idle || busy)
return busy*100 / (busy + idle);
else
return r600_is_gpu_busy(rscreen) ? 100 : 0;
}
|
