C++實(shí)現(xiàn)獲取指定代碼段的cpu占用
更新時(shí)間：2023年12月28日 10:24:52 作者：BuffaloX_X
這篇文章主要為大家詳細(xì)介紹了C++實(shí)現(xiàn)獲取指定代碼段的cpu占用的相關(guān)知識,文中的示例代碼講解詳細(xì),具有一定的借鑒價(jià)值,有需要的小伙伴可以參考一下
windows
#include <iostream>
#include <windows.h>
#include <vector>
class CodeSegmentCPUMonitor {
public:
static CodeSegmentCPUMonitor& getInstance() {
static CodeSegmentCPUMonitor instance;
return instance;
}
~CodeSegmentCPUMonitor() {
// 獲取結(jié)束性能計(jì)數(shù)器值
QueryPerformanceCounter(&endCounter);
// 計(jì)算運(yùn)行時(shí)間（秒）
double elapsedTime = static_cast<double>(endCounter.QuadPart - startCounter.QuadPart) / frequency.QuadPart;
// 計(jì)算 CPU 平均占用
double averageCPUUsage = (totalCycles / elapsedTime) * 100.0 / processorSpeed;
std::cout << "Total Average CPU Usage: " << averageCPUUsage << "%\n";
}
void enterCodeSegment() {
// 進(jìn)入代碼段時(shí)記錄開始時(shí)間
QueryPerformanceCounter(&codeSegmentStartCounter);
}
void exitCodeSegment() {
// 退出代碼段時(shí)記錄結(jié)束時(shí)間
QueryPerformanceCounter(&codeSegmentEndCounter);
// 計(jì)算代碼段的 CPU 占用
ULONGLONG codeSegmentCycles = codeSegmentEndCounter.QuadPart - codeSegmentStartCounter.QuadPart;
totalCycles += codeSegmentCycles;
}
private:
LARGE_INTEGER frequency;
LARGE_INTEGER startCounter;
LARGE_INTEGER endCounter;
LARGE_INTEGER codeSegmentStartCounter;
LARGE_INTEGER codeSegmentEndCounter;
ULONGLONG totalCycles = 0;
// 假設(shè)處理器速度為 2.5 GHz，你需要根據(jù)實(shí)際情況調(diào)整這個(gè)值
const double processorSpeed = 2.5e9;
CodeSegmentCPUMonitor() {
// 獲取性能計(jì)數(shù)器頻率
if (QueryPerformanceFrequency(&frequency)) {
// 獲取初始性能計(jì)數(shù)器值
QueryPerformanceCounter(&startCounter);
} else {
std::cerr << "Failed to get performance counter frequency.\n";
}
}
// 禁用拷貝構(gòu)造函數(shù)和賦值運(yùn)算符
CodeSegmentCPUMonitor(const CodeSegmentCPUMonitor&) = delete;
CodeSegmentCPUMonitor& operator=(const CodeSegmentCPUMonitor&) = delete;
};
int main() {
// Example: Measure CPU usage for code segment 1
{
CodeSegmentCPUMonitor::getInstance().enterCodeSegment();
// Your code segment 1 here
CodeSegmentCPUMonitor::getInstance().exitCodeSegment();
}
// Example: Measure CPU usage for code segment 2
{
CodeSegmentCPUMonitor::getInstance().enterCodeSegment();
// Your code segment 2 here
CodeSegmentCPUMonitor::getInstance().exitCodeSegment();
}
// ... Add more code segments as needed ...
return 0;
}
linux
#include <iostream>
#include <vector>
#include <ctime>
class CodeSegmentCPUMonitor {
public:
static CodeSegmentCPUMonitor& getInstance() {
static CodeSegmentCPUMonitor instance;
return instance;
}
~CodeSegmentCPUMonitor() {
// 獲取結(jié)束時(shí)間
struct timespec endTime;
clock_gettime(CLOCK_MONOTONIC, &endTime);
// 計(jì)算運(yùn)行時(shí)間（秒）
double elapsedTime = static_cast<double>(endTime.tv_sec - startTime.tv_sec) +
static_cast<double>(endTime.tv_nsec - startTime.tv_nsec) / 1e9;
// 計(jì)算 CPU 平均占用
double averageCPUUsage = (totalCycles / elapsedTime) * 100.0 / processorSpeed;
std::cout << "Total Average CPU Usage: " << averageCPUUsage << "%\n";
}
void enterCodeSegment() {
// 進(jìn)入代碼段時(shí)記錄開始時(shí)間
clock_gettime(CLOCK_MONOTONIC, &codeSegmentStartTime);
}
void exitCodeSegment() {
// 退出代碼段時(shí)記錄結(jié)束時(shí)間
struct timespec codeSegmentEndTime;
clock_gettime(CLOCK_MONOTONIC, &codeSegmentEndTime);
// 計(jì)算代碼段的 CPU 占用
double codeSegmentElapsedTime = static_cast<double>(codeSegmentEndTime.tv_sec - codeSegmentStartTime.tv_sec) +
static_cast<double>(codeSegmentEndTime.tv_nsec - codeSegmentStartTime.tv_nsec) / 1e9;
totalCycles += codeSegmentElapsedTime;
}
private:
struct timespec startTime;
struct timespec codeSegmentStartTime;
double totalCycles = 0;
// 假設(shè)處理器速度為 2.5 GHz，你需要根據(jù)實(shí)際情況調(diào)整這個(gè)值
const double processorSpeed = 2.5e9;
CodeSegmentCPUMonitor() {
// 獲取初始時(shí)間
clock_gettime(CLOCK_MONOTONIC, &startTime);
}
// 禁用拷貝構(gòu)造函數(shù)和賦值運(yùn)算符
CodeSegmentCPUMonitor(const CodeSegmentCPUMonitor&) = delete;
CodeSegmentCPUMonitor& operator=(const CodeSegmentCPUMonitor&) = delete;
};
int main() {
// Example: Measure CPU usage for code segment 1
{
CodeSegmentCPUMonitor::getInstance().enterCodeSegment();
// Your code segment 1 here
CodeSegmentCPUMonitor::getInstance().exitCodeSegment();
}
// Example: Measure CPU usage for code segment 2
{
CodeSegmentCPUMonitor::getInstance().enterCodeSegment();
// Your code segment 2 here
CodeSegmentCPUMonitor::getInstance().exitCodeSegment();
}
// ... Add more code segments as needed ...
return 0;
}linux和windows條件編譯
#include <iostream>
#ifdef _WIN32
#include <windows.h>
#else
#include <ctime>
#endif
class CodeSegmentCPUMonitor {
public:
static CodeSegmentCPUMonitor& getInstance() {
static CodeSegmentCPUMonitor instance;
return instance;
}
~CodeSegmentCPUMonitor() {
#ifdef _WIN32
FILETIME endTime;
GetSystemTimeAsFileTime(&endTime);
ULARGE_INTEGER endTime64;
endTime64.LowPart = endTime.dwLowDateTime;
endTime64.HighPart = endTime.dwHighDateTime;
double elapsedTime = static_cast<double>(endTime64.QuadPart - startTime.QuadPart) / frequency.QuadPart;
#else
struct timespec endTime;
clock_gettime(CLOCK_MONOTONIC, &endTime);
double elapsedTime = static_cast<double>(endTime.tv_sec - startTime.tv_sec) +
static_cast<double>(endTime.tv_nsec - startTime.tv_nsec) / 1e9;
#endif
double averageCPUUsage = (totalCycles / elapsedTime) * 100.0 / processorSpeed;
std::cout << "Total Average CPU Usage: " << averageCPUUsage << "%\n";
}
void enterCodeSegment() {
#ifdef _WIN32
GetSystemTimeAsFileTime(&codeSegmentStartTime);
#else
clock_gettime(CLOCK_MONOTONIC, &codeSegmentStartTime);
#endif
}
void exitCodeSegment() {
#ifdef _WIN32
FILETIME codeSegmentEndTime;
GetSystemTimeAsFileTime(&codeSegmentEndTime);
ULARGE_INTEGER codeSegmentEndTime64;
codeSegmentEndTime64.LowPart = codeSegmentEndTime.dwLowDateTime;
codeSegmentEndTime64.HighPart = codeSegmentEndTime.dwHighDateTime;
double codeSegmentElapsedTime = static_cast<double>(codeSegmentEndTime64.QuadPart - codeSegmentStartTime.QuadPart) / frequency.QuadPart;
#else
struct timespec codeSegmentEndTime;
clock_gettime(CLOCK_MONOTONIC, &codeSegmentEndTime);
double codeSegmentElapsedTime = static_cast<double>(codeSegmentEndTime.tv_sec - codeSegmentStartTime.tv_sec) +
static_cast<double>(codeSegmentEndTime.tv_nsec - codeSegmentStartTime.tv_nsec) / 1e9;
#endif
totalCycles += codeSegmentElapsedTime;
}
private:
#ifdef _WIN32
LARGE_INTEGER frequency;
LARGE_INTEGER startTime;
FILETIME codeSegmentStartTime;
#else
struct timespec startTime;
struct timespec codeSegmentStartTime;
#endif
double totalCycles = 0;
const double processorSpeed = 2.5e9;
CodeSegmentCPUMonitor() {
#ifdef _WIN32
QueryPerformanceFrequency(&frequency);
QueryPerformanceCounter(&startTime);
#else
clock_gettime(CLOCK_MONOTONIC, &startTime);
#endif
}
CodeSegmentCPUMonitor(const CodeSegmentCPUMonitor&) = delete;
CodeSegmentCPUMonitor& operator=(const CodeSegmentCPUMonitor&) = delete;
};
int main() {
// Example: Measure CPU usage for code segment 1
{
CodeSegmentCPUMonitor::getInstance().enterCodeSegment();
// Your code segment 1 here
CodeSegmentCPUMonitor::getInstance().exitCodeSegment();
}
// Example: Measure CPU usage for code segment 2
{
CodeSegmentCPUMonitor::getInstance().enterCodeSegment();
// Your code segment 2 here
CodeSegmentCPUMonitor::getInstance().exitCodeSegment();
}
// ... Add more code segments as needed ...
return 0;
}解耦log接口的形式1
#include <iostream>
#include <string>
// CPU Monitor Output Interface
class CPUMonitorOutputInterface {
public:
virtual ~CPUMonitorOutputInterface() {}
virtual void log(const std::string& message) = 0;
};
// ConsoleLogger: 實(shí)現(xiàn)CPUMonitorOutputInterface的一個(gè)Logger類示例
class ConsoleLogger : public CPUMonitorOutputInterface {
public:
void log(const std::string& message) override {
std::cout << "Logger: " << message << std::endl;
}
};
class CodeSegmentCPUMonitor {
public:
CodeSegmentCPUMonitor(CPUMonitorOutputInterface& logger) : logger(logger) {
#ifdef _WIN32
QueryPerformanceFrequency(&frequency);
QueryPerformanceCounter(&startTime);
#else
clock_gettime(CLOCK_MONOTONIC, &startTime);
#endif
}
~CodeSegmentCPUMonitor() {
#ifdef _WIN32
FILETIME endTime;
GetSystemTimeAsFileTime(&endTime);
ULARGE_INTEGER endTime64;
endTime64.LowPart = endTime.dwLowDateTime;
endTime64.HighPart = endTime.dwHighDateTime;
double elapsedTime = static_cast<double>(endTime64.QuadPart - startTime.QuadPart) / frequency.QuadPart;
#else
struct timespec endTime;
clock_gettime(CLOCK_MONOTONIC, &endTime);
double elapsedTime = static_cast<double>(endTime.tv_sec - startTime.tv_sec) +
static_cast<double>(endTime.tv_nsec - startTime.tv_nsec) / 1e9;
#endif
double averageCPUUsage = (totalCycles / elapsedTime) * 100.0 / processorSpeed;
logger.log("Total Average CPU Usage: " + std::to_string(averageCPUUsage) + "%");
}
void enterCodeSegment() {
#ifdef _WIN32
GetSystemTimeAsFileTime(&codeSegmentStartTime);
#else
clock_gettime(CLOCK_MONOTONIC, &codeSegmentStartTime);
#endif
}
void exitCodeSegment() {
#ifdef _WIN32
FILETIME codeSegmentEndTime;
GetSystemTimeAsFileTime(&codeSegmentEndTime);
ULARGE_INTEGER codeSegmentEndTime64;
codeSegmentEndTime64.LowPart = codeSegmentEndTime.dwLowDateTime;
codeSegmentEndTime64.HighPart = codeSegmentEndTime.dwHighDateTime;
double codeSegmentElapsedTime = static_cast<double>(codeSegmentEndTime64.QuadPart - codeSegmentStartTime.QuadPart) / frequency.QuadPart;
#else
struct timespec codeSegmentEndTime;
clock_gettime(CLOCK_MONOTONIC, &codeSegmentEndTime);
double codeSegmentElapsedTime = static_cast<double>(codeSegmentEndTime.tv_sec - codeSegmentStartTime.tv_sec) +
static_cast<double>(codeSegmentEndTime.tv_nsec - codeSegmentStartTime.tv_nsec) / 1e9;
#endif
totalCycles += codeSegmentElapsedTime;
}
private:
CPUMonitorOutputInterface& logger;
#ifdef _WIN32
LARGE_INTEGER frequency;
LARGE_INTEGER startTime;
FILETIME codeSegmentStartTime;
#else
struct timespec startTime;
struct timespec codeSegmentStartTime;
#endif
double totalCycles = 0;
const double processorSpeed = 2.5e9;
};
int main() {
// Example: Measure CPU usage for code segment 1 with ConsoleLogger
{
ConsoleLogger consoleLogger;
CodeSegmentCPUMonitor monitor(consoleLogger);
monitor.enterCodeSegment();
// Your code segment 1 here
monitor.exitCodeSegment();
}
// Example: Measure CPU usage for code segment 2 with ConsoleLogger
{
ConsoleLogger consoleLogger;
CodeSegmentCPUMonitor monitor(consoleLogger);
monitor.enterCodeSegment();
// Your code segment 2 here
monitor.exitCodeSegment();
}
// ... Add more code segments as needed ...
return 0;
}到此這篇關(guān)于C++實(shí)現(xiàn)獲取指定代碼段的cpu占用的文章就介紹到這了,更多相關(guān)C++獲取cpu占用內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！
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