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/*
* Copyright (C) 2018-2025 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/os_interface/linux/os_time_linux.h"
#include "shared/source/execution_environment/root_device_environment.h"
#include "shared/source/helpers/hw_info.h"
#include "shared/source/os_interface/os_interface.h"
#include <chrono>
#include <time.h>
namespace NEO {
OSTimeLinux::OSTimeLinux(OSInterface &osInterface, std::unique_ptr<DeviceTime> deviceTime) {
this->osInterface = &osInterface;
auto hwInfo = osInterface.getDriverModel()->getHardwareInfo();
if (hwInfo->capabilityTable.timestampValidBits < 64) {
this->maxGpuTimeStamp = 1ull << hwInfo->capabilityTable.timestampValidBits;
}
resolutionFunc = &clock_getres;
getTimeFunc = &clock_gettime;
this->deviceTime = std::move(deviceTime);
}
bool OSTimeLinux::getCpuTime(uint64_t *timestamp) {
struct timespec ts {};
if (getTimeFunc(CLOCK_MONOTONIC_RAW, &ts)) {
return false;
}
*timestamp = (uint64_t)ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec;
return true;
}
bool OSTime::getCpuTimeHost(uint64_t *timestamp) {
struct timespec ts {};
auto ret = clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
*timestamp = (uint64_t)ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec;
return ret;
}
double OSTimeLinux::getHostTimerResolution() const {
struct timespec ts {};
if (resolutionFunc(CLOCK_MONOTONIC_RAW, &ts)) {
return 0;
}
return static_cast<double>(ts.tv_nsec + ts.tv_sec * NSEC_PER_SEC);
}
uint64_t OSTimeLinux::getCpuRawTimestamp() {
uint64_t timesInNsec = 0;
uint64_t ticksInNsec = 0;
if (!getCpuTime(×InNsec)) {
return 0;
}
ticksInNsec = static_cast<uint64_t>(getHostTimerResolution());
if (ticksInNsec == 0) {
return 0;
}
return timesInNsec / ticksInNsec;
}
std::unique_ptr<OSTime> OSTimeLinux::create(OSInterface &osInterface, std::unique_ptr<DeviceTime> deviceTime) {
return std::unique_ptr<OSTime>(new OSTimeLinux(osInterface, std::move(deviceTime)));
}
} // namespace NEO
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