Real time(也称为 wall time 或 clock time)指的是从开始执行程序到程序完成所花费的时间,包括了 CPU 时间和与 CPU 时间无关的时间。 Wall time(也称为 clock time 或 real time)和 Real time 意义相同,都是指程序从开始执行到结束所花费的时间,包括了 CPU 时间和与 CPU 时间无关的时间。 关于CPU time...
In the example above CPU time was lower than wall clock time, but other relationships are possible. It’s easier to express the possible relationship as a ratio of(CPU time) / (wall clock time), which is to sayCPU/second. If this is a single-threaded process: CPU/second ≈ 1:The pr...
Real time(也称为 wall time 或 clock time)指的是从开始执行程序到程序完成所花费的时间,包括了 CPU 时间和与 CPU 时间无关的时间。 Wall time(也称为 clock time 或 real time)和 Real time 意义相同,都是指程序从开始执行到结束所花费的时间,包括了 CPU 时间和与 CPU 时间无关的时间。 关于CPU time...
Wall Clock Time 是一段代码在某个线程上实际执行的时间,但由于cpu是分时间片给线程的,同时一段代码可能由于IO,还是类似调用wait等线程调用方法,阻塞不执行了,此时cpu会分配给其它线程,但这段代码其实并没有执行完,可能等某个条件触发后,轮到这段代码在的线程分到cpu后,继续执行,而执行这段代码cpu真正的用时是...
Wall time is the real-word time a user of a computer perceives time, which is often different than the computer itself. CPU clock speed andinstruction set. How many other processes are running. Waiting for diskI/O. Waiting for network I/O. ...
ThreadCpuTime& t = _ringbuf[atomicInc(_write_ptr) & (RINGBUF_SIZE - 1)]; t.trace = trace; @@ -126,7 +132,7 @@ void WallClock::signalHandler(int signo, siginfo_t* siginfo, void* ucontext) { event._thread_state = getThreadState(ucontext); ...
Wall clock time analysis using PerfViewArticle 11/26/2012 By default when you collect data using PerfView you are collecting the right events to do a CPU time investigation. However there are other things that can slow your program down beside using too much CPU time. It is not uncommon ...
The interval of wall clock profiling can be set independently of cpu interval, e.g. -e cpu -i 10ms --wall 200ms -f out.jfr Agent arguments equivalent: event=cpu,interval=10ms,wall=200ms,file=out.jfr Joint output cpu and wall can be profiled together only with jfr output. Both ...
JDK-4614021 : provide a high resolution timer in j2se for both wall-clock and virtual CPU time Name: ca25432 Date: 12/14/2001 Provide a High resolution timer or something that would resemble a Win32 high performance timer or multimedia timer (accuracy around or greater than 1ms)....
The time-range feature relies on the system clock of the ASA; however, the feature works best with NTP synchronization. Examples The following example shows how to restore the default behavior of the absolute keyword: ciscoasa(config-time-range)# default absolute Related Commands Command Desc...