一个项目需要,特地写了这些功能的函数。
process_stat.h的内容如下:
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- #ifndef PROCESS_STAT_H
- #define PROCESS_STAT_H
- #ifdef __cplusplus
- extern "C" {
- #endif
- typedef long long int64_t;
- typedef unsigned long long uint64_t;
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- int get_cpu_usage();
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- int get_memory_usage(uint64_t* mem, uint64_t* vmem);
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- int get_io_bytes(uint64_t* read_bytes, uint64_t* write_bytes);
- #ifdef __cplusplus
- }
- #endif
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- #endif/*PROCESS_STAT_H*/
process_stat_win.c的内容如下:
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- #include <windows.h>
- #include <psapi.h>
- #include <assert.h>
- #include "process_stat.h"
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- static uint64_t file_time_2_utc(const FILETIME* ftime)
- {
- LARGE_INTEGER li;
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- assert(ftime);
- li.LowPart = ftime->dwLowDateTime;
- li.HighPart = ftime->dwHighDateTime;
- return li.QuadPart;
- }
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- static int get_processor_number()
- {
- SYSTEM_INFO info;
- GetSystemInfo(&info);
- return (int)info.dwNumberOfProcessors;
- }
- int get_cpu_usage()
- {
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- static int processor_count_ = -1;
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- static int64_t last_time_ = 0;
- static int64_t last_system_time_ = 0;
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- FILETIME now;
- FILETIME creation_time;
- FILETIME exit_time;
- FILETIME kernel_time;
- FILETIME user_time;
- int64_t system_time;
- int64_t time;
- int64_t system_time_delta;
- int64_t time_delta;
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- int cpu = -1;
- if(processor_count_ == -1)
- {
- processor_count_ = get_processor_number();
- }
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- GetSystemTimeAsFileTime(&now);
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- if (!GetProcessTimes(GetCurrentProcess(), &creation_time, &exit_time,
- &kernel_time, &user_time))
- {
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- Manager)
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- we have
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- return -1;
- }
- system_time = (file_time_2_utc(&kernel_time) + file_time_2_utc(&user_time))
-
- /
- processor_count_;
- time = file_time_2_utc(&now);
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- if ((last_system_time_ == 0) || (last_time_ == 0))
- {
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- last_system_time_ = system_time;
- last_time_ = time;
- return -1;
- }
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- system_time_delta = system_time - last_system_time_;
- time_delta = time - last_time_;
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- assert(time_delta != 0);
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- if (time_delta == 0)
- return -1;
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- cpu = (int)((system_time_delta * 100 + time_delta / 2) / time_delta);
- last_system_time_ = system_time;
- last_time_ = time;
- return cpu;
- }
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- int get_memory_usage(uint64_t* mem, uint64_t* vmem)
- {
- PROCESS_MEMORY_COUNTERS pmc;
- if(GetProcessMemoryInfo(GetCurrentProcess(), &pmc, sizeof(pmc)))
- {
- if(mem) *mem = pmc.WorkingSetSize;
- if(vmem) *vmem = pmc.PagefileUsage;
- return 0;
- }
- return -1;
- }
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- int get_io_bytes(uint64_t* read_bytes, uint64_t* write_bytes)
- {
- IO_COUNTERS io_counter;
- if(GetProcessIoCounters(GetCurrentProcess(), &io_counter))
- {
- if(read_bytes) *read_bytes = io_counter.ReadTransferCount;
- if(write_bytes) *write_bytes = io_counter.WriteTransferCount;
- return 0;
- }
- return -1;
- }
可以这样使用:
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- #include "process_stat.h"
- #include <stdio.h>
- #include <Windows.h>
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- int main()
- {
- while(1)
- {
- int cpu;
- uint64_t mem, vmem, r, w;
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- cpu = get_cpu_usage();
- get_memory_usage(&mem, &vmem);
- get_io_bytes(&r, &w);
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- printf("CPU使用率: %u\n",cpu);
- printf("内存使用: %u 字节\n", mem);
- printf("虚拟内存使用: %u 字节\n", vmem);
- printf("总共读: %u 字节\n", r);
- printf("总共写: %u 字节\n", w);
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- Sleep(1000);
- }
- return 0;
- }
(张亚霏) |