at 3:36 AM, Stefan Hajnoczi <stefa...@gmail.com> wrote: > > > On Sun, Jul 24, 2022, 11:21 Jinhao Fan <fanjinhao...@ict.ac.cn> wrote: > at 9:29 PM, Stefan Hajnoczi <stefa...@gmail.com> wrote: > > > > > Nice, perf(1) is good for that. You can enable trace events and add > > kprobes/uprobes to record timestamps when specific functions are entered. > > > > Thanks Stefan, > > One last question: Currently we can achieve hundreds of KIOPS. That means > perf can easily capture millions of trace events per second. I found perf > has quite high overhead at such a rate of trace events. Do you have any > advices on tracing high IOPS tasks? > > I don't. BTW uprobes are expensive but kprobes are cheaper. > > Stefan
Gotcha. Thanks! Jinhao Fan
