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
|
/*
* Copyright (C) 2020-2025 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "level_zero/sysman/source/shared/linux/pmu/sysman_pmu_imp.h"
#include "level_zero/sysman/source/shared/linux/kmd_interface/sysman_kmd_interface.h"
namespace L0 {
namespace Sysman {
const std::string PmuInterfaceImp::deviceDir("device");
const std::string PmuInterfaceImp::sysDevicesDir("/sys/devices/");
static constexpr int64_t perfEventOpenSyscallNumber = 298;
int32_t PmuInterfaceImp::getErrorNo() {
return errno;
}
inline int64_t PmuInterfaceImp::perfEventOpen(perf_event_attr *attr, pid_t pid, int cpu, int groupFd, uint64_t flags) {
attr->size = sizeof(*attr);
return this->syscallFunction(perfEventOpenSyscallNumber, attr, pid, cpu, groupFd, flags);
}
int64_t PmuInterfaceImp::pmuInterfaceOpen(uint64_t config, int group, uint32_t format) {
struct perf_event_attr attr = {};
int nrCpus = get_nprocs_conf();
int cpu = 0;
int64_t ret = 0;
attr.type = pSysmanKmdInterface->getEventType();
if (attr.type == 0) {
return -ENOENT;
}
if (group >= 0) {
format &= ~PERF_FORMAT_GROUP;
}
attr.read_format = static_cast<uint64_t>(format);
attr.config = config;
do {
ret = perfEventOpen(&attr, -1, cpu++, group, 0);
} while ((ret < 0 && getErrorNo() == EINVAL) && (cpu < nrCpus));
return ret;
}
int32_t PmuInterfaceImp::pmuRead(int fd, uint64_t *data, ssize_t sizeOfdata) {
ssize_t len;
len = this->readFunction(fd, data, sizeOfdata);
if (len != sizeOfdata) {
return -1;
}
return 0;
}
PmuInterfaceImp::PmuInterfaceImp(LinuxSysmanImp *pLinuxSysmanImp) {
pSysmanKmdInterface = pLinuxSysmanImp->getSysmanKmdInterface();
}
PmuInterface *PmuInterface::create(LinuxSysmanImp *pLinuxSysmanImp) {
PmuInterfaceImp *pPmuInterfaceImp = new PmuInterfaceImp(pLinuxSysmanImp);
UNRECOVERABLE_IF(nullptr == pPmuInterfaceImp);
return pPmuInterfaceImp;
}
} // namespace Sysman
} // namespace L0
|
