pprof is not only cpu profiling - it is the same tracing infrastructure used in the go analyzer.
> On Apr 22, 2020, at 2:28 PM, David Finkel <david.fin...@gmail.com> wrote: > > > > >> On Mon, Apr 20, 2020 at 8:35 PM asaxena via golang-nuts >> <golang-nuts@googlegroups.com> wrote: >> Hi, >> >> I am trying CPU profiling a program that runs for an hour. However when I >> start pprof it says Total samples are only for 1.32 min. Why are the samples >> not collected for the whole duration of the program ? Is there a missing >> setting I need to enable ? > It sounds like it was collected fro the duration of the program (see below), > no additional configuration needed. >> >> Duration: 1.14hrs, Total samples = 1.32mins ( 1.94%) > This generally means that your process only used (roughly) 1.32 minutes of > CPU-time over the 1.14hrs of the profile. Equivalent to an average CPU-usage > of the 1.94% it listed. > My usual inference from this kind of profile is that this program is not > CPU-bound and instead I/O or network-bound. > > CPU-profiling is only useful for debugging cpu-bound operations, it doesn't > tell you where operations were blocked, contending, etc. > Diego's suggestion of instrumenting your code with some sort of metrics > library (I'm a fan of opencensus's stats + prometheus) is rather useful for > tracking aggregate stats. > > In general, though, if you have a specific request/process you want to find > the bottleneck in, it's hard to get away from tracing. I've used opentracing > with Zipkin, but most recently I use opencensus tracing with stackdriver. For > a single process, though I just use opencensus's zpages to get a view of the > current trace-spans on that process. >> >> Thanks. >> -- >> 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/a13db751-0f65-4b0b-aaf3-f39bc29e21cf%40googlegroups.com. > > -- > 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/CANrC0BizHrEy73JWJZHPrVx2Wb91z0vPj87HgLcg6nu1ydg0Mg%40mail.gmail.com. -- 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/B192190A-6731-40D7-AB29-B071C0952EE0%40ix.netcom.com.
