Windows性能计数器多久可用？

Question

我无法在重新启动的Windows 7计算机上从远程计算机上获取性能计数器，直到我登录后1分钟到2分钟。有什么方法可以让它更快地提供吗？我使用以下代码：

PDH_STATUS  status;
HQUERY        perfQuery = NULL;
HCOUNTER    uptimeCounter;
char        uptimeCounterPath[] = "\\\\SRVJET01\\System\\System Up Time";
PDH_FMT_COUNTERVALUE uptimeValue;
DWORD seconds = 0;
if( PdhOpenQuery(NULL, 0, perfQuery ) != ERROR_SUCCESS )
    return FALSE;

status = PdhAddCounter(perfQuery, uptimeCounterPath,0, &uptimeCounter );
if( status != ERROR_SUCCESS )
    return FALSE;

status = PdhCollectQueryData( perfQuery );
if( status != ERROR_SUCCESS )
    return FALSE;

status = PdhGetFormattedCounterValue( uptimeCounter, PDH_FMT_LARGE , NULL, &uptimeValue );
if( status != ERROR_SUCCESS )
    return FALSE;

PdhCloseQuery( &perfQuery );

seconds = (DWORD) (uptimeValue.largeValue);