usingSystem;usingSystem.Runtime.InteropServices;namespaceHighPrecisionTimer{/// /// 定时器分辨率:毫秒/// structTimerCaps{/// 最小周期publicintperiodMin;/// 最大周期publicintperiodMax;}/// /// 高精度定时器/// publicclassHPTimer{staticHPTimer(){TimeGetDevCaps(ref_caps,Marshal.SizeOf(_caps...
Implement a Continuously Updating, High-Resolution Time Provider for Windows Johan Nilsson Code download available at:HighResolutionTimer.exe(404 KB) This article assumes you're familiar with C++ and the Win32 API SUMMARY The timestamps that you can obtain from Windows NT are limite...
特别是在支持CPU频率动态调整的计算机上,windows系统下的QueryPerformanceFrequency()获取HPET(假设存在)的频率,而QueryPerformanceCounter()获取HPET(假设存在高精度事件定时器(High Precision Event Timer))自上电以来时钟周期数,与CPU频率无关。前一个函数不会由于线程执行所在的CPU不同或CPU的频率在不同一时候刻的差异...
K ey w ords :high precision timing ;message mechanism ;timer 0 引 言 在工业生产控制系统中,有许多需要定时完成的操作,如:定时显示当前时间,定时刷新屏幕上的进度条,上位机定时向下位机发送命令和传送数据等。特别是对控制性能要求较高的控制系统和数据采集系统中,需要高精度定时。在Win 2dows 下开发这些...
classZIA32Timer { public: ZIA32Timer(doubleghz) :m_startcycle(0), m_ghz(ghz) { #ifndef _WIN32 m_high=0; m_low=0; #endif } voidStart() { #ifdef _WIN32 m_startcycle=RTSC(); #else RTSC(); m_startcycle=(unsignedlonglong) m_high*(1<<30)*4+m_low; ...
System timerACPI\PNP0100 WAN 微型端口(IPv6)ms_ndiswanipv6 NdisWan ndiswan.sys High precision event timerACPI\PNP0103 Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27CAPCI\VEN_8086&DEV_27CA&SUBSYS_27CA8086&REV_01 usbuhci usbuhci.sys Intel(R) G33/G31/P35/P31 Express ...
0. However,since high-precision timing is often necessary for embedded system,and Window operation system (OS) isn't real-time OS. How to design timer to meet different embedded system requirement becomes a vital process for VC 6. 0 development. In this paper,all kinds of timer design ...
High Precision Event Timeren.wikipedia.org/wiki/High_Precision_Event_Timer 当今CPU和GPU的工作...
Assume that you enable the High Precision Event Timer on a computer that is running 32-bit version of Windows 7 Service Pack 1 (SP1). In this situation, you experience high CPU usage on the computer. Cause This issue occurs b...
(The Microsoft High Precision Event Timer (HPET) is disabled by default on desktop virtual machines.)However, it may cause Windows 10 1809 desktop virtual machines to get into "Agent Unreachable" state.(The desktop can be "Available" state after starting up, but soon it may become "Agent ...