函数原型:time_t time(time_t * timer) 功能: 获取当前的系统时间,返回的结果是一个time_t类型,其实就是一个大整数(long),其值表示从CUT (Coordinated Universal Time)时间1970年1月1日00:00:00(称为UNIX系统的Epoch时间)到当前时刻的秒数。然后调用localtime将time_t所表示的CUT时间
头文件:windows.h 函数原型:BOOLQueryPerformanceCounter(LARGE_INTEGER *lpPerformanceCount); BOOLQueryPerformanceFrequency(LARGE_INTEGER *lpFrequency); 功能:前者获得的是CPU从开机以来执行的时钟周期数。后者用于获得你的机器一秒钟执行多少次,就是你的时钟周期。 补充:LARGE_INTEGER既可以是一个8字节长的整型数,也...
@interfaceNSTimer:NSObject+(NSTimer*)timerWithTimeInterval:(NSTimeInterval)ti invocation:(NSInvocation*)invocation repeats:(BOOL)yesOrNo;//实例化方法, 响应事件用的NSInvocation, 需要手动添加到RunLoop中才会生效+(NSTimer*)scheduledTimerWithTimeInterval:(NSTimeInterval)ti invocation:(NSInvocation*)invocati...
- throughput-performance - virtual-guest - virtual-host Current active profile: balanced [root@localhost ~]# [root@localhost ~]# head /lib/tuned/latency-performance/tuned.conf | grep latency -a1 [cpu] force_latency=1 governor=performance [root@localhost ~]# [root@localhost ~]# tuned-adm pr...
"This example provides functionality to test performance of the VT_timestamp() function." "Ensure that the corresponding compiler,
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Modular C++ Toolkit for Performance Analysis and Logging. Profiling API and Tools for C, C++, CUDA, Fortran, and Python. The C++ template API is essentially a framework to creating tools: it is designed to provide a unifying interface for recording vario
I am looking for a simple timer interrupt arrangement in my application. No hardware is involved, it's purely software.I have an application that runs on a Windows 2003 Server, written in C, developed in Visual Studio 2008. Without going into unnecessary detail, essentially, I require a ...
Current active profile:balanced[root@localhost~]#[root@localhost~]# head/lib/tuned/latency-performance/tuned.conf|grep latency-a1[cpu]force_latency=1governor=performance[root@localhost~]#[root@localhost~]# tuned-adm profile latency-performance[root@localhost~]#[root@localhost~]# hexdump/dev/cpu_dm...
除了对通用主机时间戳函数myCPUTimer()的两次调用外,我们还使用显式同步屏障cudaDeviceSynchronize()来阻止 CPU 的执行,直到设备上以前发出的所有命令都已完成。如果没有这个屏障,这段代码将测量内核发射时间,而不是内核执行时间。 使用CUDA 事件计时 使用主机设备同步点(如cudaDeviceSynchronize()的一个问题是它们会暂...