Thanks Robert, I'm trying to utilize the tool now, the new output rendered by goanalyzer contains a page for PC:0 goroutines, which were discussed in #29103 <https://github.com/golang/go/issues/29103>, but seems no further details are available, are they considered irrelevant to perf. analysis?
On Thursday, March 5, 2020 at 8:09:18 PM UTC+8, Robert Engels wrote: > > You might be interested in github.com/robaho/go-analyzer which I believe > significantly improves the profiling information when dealing with highly > concurrent Go programs. > > On Mar 5, 2020, at 12:13 AM, Xiangdong JI <xiang...@arm.com <javascript:>> > wrote: > > > Thanks Ian. > > I'm using schedtrace and scheddetail to help understand the scheduling > flow, the minimum monitoring window seems to be 1ms only, possible to get > more detailed info? > Furthermore, sched* outputs extensive logs but what I expect, at present, > might be something like when a goroutine is parked due to what reason, > etc., can I get it with the existing diagnostics? > > > On Thursday, March 5, 2020 at 11:24:23 AM UTC+8, Ian Lance Taylor wrote: >> >> On Wed, Mar 4, 2020 at 6:44 PM Xiangdong JI <xiang...@arm.com> wrote: >> > >> > Given the attached screenshot of pprof output, I wonder how to figure >> out the callers of 'runtime.mcall' and their cost? Thanks. >> >> You can't, but it doesn't matter. The mcall function is used when a >> thread changes from executing one goroutine to a different goroutine. >> Knowing the code that triggers the call into mcall won't tell you >> anything. It's just where that goroutine happened to be preempted. >> >> Ian >> > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golan...@googlegroups.com <javascript:>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/71ecd07a-0b42-4eba-9b22-5c7cc9821243%40googlegroups.com > > <https://groups.google.com/d/msgid/golang-nuts/71ecd07a-0b42-4eba-9b22-5c7cc9821243%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/5b1f728e-68c5-407e-98c6-5e366fc28e53%40googlegroups.com.
