此功能参考了ProcessHacker项目的代码。
声明定义
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typedef struct _UINT64_DELTA
{
ULONG64 Value;
ULONG64 Delta;
} UINT64_DELTA, *PUINT64_DELTA;
typedef struct _UINTPTR_DELTA
{
ULONG_PTR Value;
ULONG_PTR Delta;
} UINTPTR_DELTA, *PUINTPTR_DELTA;
#define InitializeDelta(DltMgr) \
((DltMgr)->Value = 0, (DltMgr)->Delta = 0)
#define UpdateDelta(DltMgr, NewValue) \
((DltMgr)->Delta = (NewValue) - (DltMgr)->Value, \
(DltMgr)->Value = (NewValue), (DltMgr)->Delta)
typedef struct _SYSTEM_PERFORMANCE_INFORMATION
{
LARGE_INTEGER IdleProcessTime;
LARGE_INTEGER IoReadTransferCount;
LARGE_INTEGER IoWriteTransferCount;
LARGE_INTEGER IoOtherTransferCount;
ULONG IoReadOperationCount;
ULONG IoWriteOperationCount;
ULONG IoOtherOperationCount;
ULONG AvailablePages;
ULONG CommittedPages;
ULONG CommitLimit;
ULONG PeakCommitment;
ULONG PageFaultCount;
ULONG CopyOnWriteCount;
ULONG TransitionCount;
ULONG CacheTransitionCount;
ULONG DemandZeroCount;
ULONG PageReadCount;
ULONG PageReadIoCount;
ULONG CacheReadCount;
ULONG CacheIoCount;
ULONG DirtyPagesWriteCount;
ULONG DirtyWriteIoCount;
ULONG MappedPagesWriteCount;
ULONG MappedWriteIoCount;
ULONG PagedPoolPages;
ULONG NonPagedPoolPages;
ULONG PagedPoolAllocs;
ULONG PagedPoolFrees;
ULONG NonPagedPoolAllocs;
ULONG NonPagedPoolFrees;
ULONG FreeSystemPtes;
ULONG ResidentSystemCodePage;
ULONG TotalSystemDriverPages;
ULONG TotalSystemCodePages;
ULONG NonPagedPoolLookasideHits;
ULONG PagedPoolLookasideHits;
ULONG AvailablePagedPoolPages;
ULONG ResidentSystemCachePage;
ULONG ResidentPagedPoolPage;
ULONG ResidentSystemDriverPage;
ULONG CcFastReadNoWait;
ULONG CcFastReadWait;
ULONG CcFastReadResourceMiss;
ULONG CcFastReadNotPossible;
ULONG CcFastMdlReadNoWait;
ULONG CcFastMdlReadWait;
ULONG CcFastMdlReadResourceMiss;
ULONG CcFastMdlReadNotPossible;
ULONG CcMapDataNoWait;
ULONG CcMapDataWait;
ULONG CcMapDataNoWaitMiss;
ULONG CcMapDataWaitMiss;
ULONG CcPinMappedDataCount;
ULONG CcPinReadNoWait;
ULONG CcPinReadWait;
ULONG CcPinReadNoWaitMiss;
ULONG CcPinReadWaitMiss;
ULONG CcCopyReadNoWait;
ULONG CcCopyReadWait;
ULONG CcCopyReadNoWaitMiss;
ULONG CcCopyReadWaitMiss;
ULONG CcMdlReadNoWait;
ULONG CcMdlReadWait;
ULONG CcMdlReadNoWaitMiss;
ULONG CcMdlReadWaitMiss;
ULONG CcReadAheadIos;
ULONG CcLazyWriteIos;
ULONG CcLazyWritePages;
ULONG CcDataFlushes;
ULONG CcDataPages;
ULONG ContextSwitches;
ULONG FirstLevelTbFills;
ULONG SecondLevelTbFills;
ULONG SystemCalls;
} SYSTEM_PERFORMANCE_INFORMATION, *PSYSTEM_PERFORMANCE_INFORMATION;
typedef struct _SYSTEM_BASIC_INFORMATION
{
ULONG Reserved;
ULONG TimerResolution;
ULONG PageSize;
ULONG NumberOfPhysicalPages;
ULONG LowestPhysicalPageNumber;
ULONG HighestPhysicalPageNumber;
ULONG AllocationGranularity;
ULONG_PTR MinimumUserModeAddress;
ULONG_PTR MaximumUserModeAddress;
ULONG_PTR ActiveProcessorsAffinityMask;
CCHAR NumberOfProcessors;
} SYSTEM_BASIC_INFORMATION, *PSYSTEM_BASIC_INFORMATION;
引用lib文件
项目中需要引用ntdll.lib文件，此文件可以从ProcessHacker项目中找到。
获取操作系统CPU使用率
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ULONG64 total_time = 0;
ULONG64 sys_time = 0;
static SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION CpuInformation[1024];
static SYSTEM_INFO sys_info;
static UINT64_DELTA cpu_kernel_delta;
static UINT64_DELTA cpu_user_delta;
static UINT64_DELTA cpu_idle_delta;
static SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION cpu_totals;
memset(&cpu_totals, 0, sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION));
GetSystemInfo(&sys_info);
NtQuerySystemInformation(
SystemProcessorPerformanceInformation,
&CpuInformation,
sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION) * (ULONG)sys_info.dwNumberOfProcessors,
NULL
);
for (int i = 0; i < (int)sys_info.dwNumberOfProcessors; i++)
{
SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION& cpu_info = CpuInformation[i];
// KernelTime includes idle time.
LONGLONG dpc_time = cpu_info.Reserved1[0].QuadPart;
LONGLONG interrupt_time = cpu_info.Reserved1[i].QuadPart;
cpu_info.KernelTime.QuadPart -= cpu_info.IdleTime.QuadPart;
cpu_info.KernelTime.QuadPart += dpc_time + interrupt_time;
cpu_totals.Reserved1[0].QuadPart += dpc_time;
cpu_totals.IdleTime.QuadPart += cpu_info.IdleTime.QuadPart;
cpu_totals.Reserved2 += cpu_info.Reserved2;
cpu_totals.Reserved1[1].QuadPart += cpu_info.Reserved1[1].QuadPart;
cpu_totals.KernelTime.QuadPart += cpu_info.KernelTime.QuadPart;
cpu_totals.UserTime.QuadPart += cpu_info.UserTime.QuadPart;
}
UpdateDelta(&cpu_kernel_delta, cpu_totals.KernelTime.QuadPart);
UpdateDelta(&cpu_user_delta, cpu_totals.UserTime.QuadPart);
UpdateDelta(&cpu_idle_delta, cpu_totals.IdleTime.QuadPart);
total_time = cpu_kernel_delta.Delta + cpu_user_delta.Delta + cpu_idle_delta.Delta;
sys_time = cpu_kernel_delta.Delta + cpu_user_delta.Delta;
if (total_time)
{
return sys_time * 100.0 / total_time;
}
else
{
return 0.0;
}
获取操作系统内存大小
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static SYSTEM_BASIC_INFORMATION system_basic_info;
static long long mem_size = 0;
if (mem_size != 0)
return mem_size;
static SYSTEM_INFO sys_info;
GetSystemInfo(&sys_info);
NtQuerySystemInformation(
SystemBasicInformation,
&system_basic_info,
sizeof(SYSTEM_BASIC_INFORMATION),
NULL);
mem_size = system_basic_info.NumberOfPhysicalPages;
mem_size *= sys_info.dwPageSize;
mem_size /= (1024 * 1024); //MB
return mem_size;
获取操作系统内存使用率
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static SYSTEM_PERFORMANCE_INFORMATION perf_info;
static SYSTEM_INFO sys_info;
GetSystemInfo(&sys_info);
NtQuerySystemInformation(
SystemPerformanceInformation,
&perf_info,
sizeof(SYSTEM_PERFORMANCE_INFORMATION),
NULL);
long long available_size = perf_info.AvailablePages;
available_size *= sys_info.dwPageSize;
available_size /= (1024 * 1024); //MB
long long mem_size = sys_mem_size();
if (mem_size != 0)
{
return (mem_size - available_size) * 100.0 / mem_size;
}
else
{
return 0.0;
}
http://www.cnblogs.com/hbccdf/p/get_sys_cpu_usage_and_mem_usage.html