= Windows的な問題 =

スレ立てるまでも無い問題はここに。


== メモリ情報の取得方法 ==

NTカーネルの未公開APIを叩くと色々取れたりするらしい。

 * NtQuerySystemInformation()
 * プロトタイプ宣言とかはPlatform SDKのwinternl.hあたりにあるらしい
{{{
#define SYSTEMCACHEINFORMATION 0x15

typedef struct {
	ULONG    	CurrentSize;
	ULONG    	PeakSize;
	ULONG    	PageFaultCount;
	ULONG    	MinimumWorkingSet;
	ULONG    	MaximumWorkingSet;
	ULONG    	Unused[4];
} SYSTEM_CACHE_INFORMATION;
}}}


SystemPerformanceInformation(0x02)の方がイケてる?
ULONG MmSystemCachePageという情報がある。
MSDNに記載はあるがSYSTEM_PERFORMANCE_INFORMATION構造体はopaque dataになっている。

{{{
typedef struct _SYSTEM_PERFORMANCE_INFORMATION {
	LARGE_INTEGER  IdleTime;
	LARGE_INTEGER  ReadTransferCount;
	LARGE_INTEGER  WriteTransferCount;
	LARGE_INTEGER  OtherTransferCount;
	ULONG  ReadOperationCount;
	ULONG  WriteOperationCount;
	ULONG  OtherOperationCount;
	ULONG  AvailablePages;
	ULONG  TotalCommittedPages;
	ULONG  TotalCommitLimit;
	ULONG  PeakCommitment;
	ULONG  PageFaults;
	ULONG  WriteCopyFaults;
	ULONG  TransitionFaults;
	ULONG  CacheTransitionFaults;
	ULONG  DemandZeroFaults;
	ULONG  PagesRead;
	ULONG  PageReadIos;
	ULONG	 CacheReads;
	ULONG	 CacheIos;
	ULONG  PagefilePagesWritten;
	ULONG  PagefilePageWriteIos;
	ULONG  MappedFilePagesWritten;
	ULONG  MappedFilePageWriteIos;
	ULONG  PagedPoolUsage;
	ULONG  NonPagedPoolUsage;
	ULONG  PagedPoolAllocs;
	ULONG  PagedPoolFrees;
	ULONG  NonPagedPoolAllocs;
	ULONG  NonPagedPoolFrees;
	ULONG  TotalFreeSystemPtes;
	ULONG  SystemCodePage;
	ULONG  TotalSystemDriverPages;
	ULONG  TotalSystemCodePages;
	ULONG  SmallNonPagedLookasideListAllocateHits;
	ULONG  SmallPagedLookasideListAllocateHits;
	ULONG  Reserved3;
	ULONG  MmSystemCachePage;
	ULONG  PagedPoolPage;
	ULONG  SystemDriverPage;
	ULONG  FastReadNoWait;
	ULONG  FastReadWait;
	ULONG  FastReadResourceMiss;
	ULONG  FastReadNotPossible;
	ULONG  FastMdlReadNoWait;
	ULONG  FastMdlReadWait;
	ULONG  FastMdlReadResourceMiss;
	ULONG  FastMdlReadNotPossible;
	ULONG  MapDataNoWait;
	ULONG  MapDataWait;
	ULONG  MapDataNoWaitMiss;
	ULONG  MapDataWaitMiss;
	ULONG  PinMappedDataCount;
	ULONG  PinReadNoWait;
	ULONG  PinReadWait;
	ULONG  PinReadNoWaitMiss;
	ULONG  PinReadWaitMiss;
	ULONG  CopyReadNoWait;
	ULONG  CopyReadWait;
	ULONG  CopyReadNoWaitMiss;
	ULONG  CopyReadWaitMiss;
	ULONG  MdlReadNoWait;
	ULONG  MdlReadWait;
	ULONG  MdlReadNoWaitMiss;
	ULONG  MdlReadWaitMiss;
	ULONG  ReadAheadIos;
	ULONG  LazyWriteIos;
	ULONG  LazyWritePages;
	ULONG  DataFlushes;
	ULONG  DataPages;
	ULONG  ContextSwitches;
	ULONG  FirstLevelTbFills;
	ULONG  SecondLevelTbFills;
	ULONG  SystemCalls;
} SYSTEM_PERFORMANCE_INFORMATION, *PSYSTEM_PERFORMANCE_INFORMATION;
}}}


参考:

 * http://d.hatena.ne.jp/torutk/20050612
 * http://www.atmarkit.co.jp/bbs/phpBB/viewtopic.php?topic=28456&forum=7&7
 * http://cvs.sourceforge.net/viewcvs.py/mingw/w32api/include/ddk/ntapi.h?rev=1.6
 * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/base/ntquerysysteminformation.asp