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 >
