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
|
/*
* Copyright (c) 2017-2019 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* 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 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.
*/
#include "PMU.h"
#include <asm/unistd.h>
#include <cstring>
#include <stdexcept>
#include <sys/ioctl.h>
namespace arm_compute
{
namespace test
{
namespace framework
{
PMU::PMU()
: _perf_config()
{
_perf_config.type = PERF_TYPE_HARDWARE;
_perf_config.size = sizeof(perf_event_attr);
// Start disabled
_perf_config.disabled = 1;
// The inherit bit specifies that this counter should count events of child
// tasks as well as the task specified
_perf_config.inherit = 1;
// Enables saving of event counts on context switch for inherited tasks
_perf_config.inherit_stat = 1;
}
PMU::PMU(uint64_t config)
: PMU()
{
open(config);
}
PMU::~PMU()
{
close();
}
void PMU::open(uint64_t config)
{
_perf_config.config = config;
open(_perf_config);
}
void PMU::open(const perf_event_attr &perf_config)
{
// Measure this process/thread (+ children) on any CPU
_fd = syscall(__NR_perf_event_open, &perf_config, 0, -1, -1, 0);
ARM_COMPUTE_ERROR_ON_MSG(_fd < 0, "perf_event_open failed");
const int result = ioctl(_fd, PERF_EVENT_IOC_ENABLE, 0);
if(result == -1)
{
ARM_COMPUTE_ERROR_VAR("Failed to enable PMU counter: %d", errno);
}
}
void PMU::close()
{
if(_fd != -1)
{
::close(_fd);
_fd = -1;
}
}
void PMU::reset()
{
const int result = ioctl(_fd, PERF_EVENT_IOC_RESET, 0);
if(result == -1)
{
ARM_COMPUTE_ERROR_VAR("Failed to reset PMU counter: %d", errno);
}
}
} // namespace framework
} // namespace test
} // namespace arm_compute
|
