On Thu, Feb 6, 2025 at 9:38 AM Elad Gavra <gav...@gmail.com> wrote:
> We run a simple go program and we see the same syscalls so that really > provides nothing. I think we will keep an eye on it and understand it > better. > > The main benefit to running the binary outside a container is that you get more flexibility for debugging. (especially toolwise) My recommendation would be to add an HTTP server with net/http/pprof linked in so you can grab CPU profiles and goroutine dumps. https://pkg.go.dev/net/http/pprof#pkg-overview I don't remember how well it works for Go binaries' debug info, but you can use the perf tool <https://perfwiki.github.io/main/> to get profiling information both system-wide and per-process. (pprof is usually quite good, so I don't usually switch to perf) > On Thu, Feb 6, 2025, 16:35 Sharon Mafgaoker <sha...@cloud5.co.il> wrote: > >> Can you try to start it locally on your machine? >> >> >> Sharon Mafgaoker – Senior Solutions Architect >> >> M. 050 995 99 16 | sha...@cloud5.co.il >> >> >> >> >> On Thu, 6 Feb 2025 at 16:27 Robert Engels <reng...@ix.netcom.com> wrote: >> >>> I would start by testing on the latest Go version. You really haven’t >>> provided anywhere enough details to help. I suspect if your app is not >>> starting at all you have a bad image. >>> >>> On Feb 6, 2025, at 7:32 AM, Gavra <gav...@gmail.com> wrote: >>> >>> Hi, >>> We encountered an issue where our application consumed 100% CPU. The app >>> was stuck (instruction-wise). It is an app we run in a docker alpine >>> container. >>> The execve is our app. This happens right when we start it. >>> The NULL param for mmap and the large buff size for getaffinity got my >>> eye but we have no idea how to proceed. It appears this happens prior to >>> any logic of our app. >>> >>> That first NULL parameter to mmap is normal. It's asking the kernel to pick a random address (in this case, for Go's heap) The sched_getaffinity call is used by the Go runtime to compute how many cores are available and default GOMAXPROCS to something reasonable. > >>> Any idea? >>> >>> Thanks! >>> >>> <image (2).png> >>> >>> <Screenshot 2025-02-06 at 10.15.27.png> >>> >>> >>> -- >>> 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 visit >>> https://groups.google.com/d/msgid/golang-nuts/724f4958-2fb4-4f08-ac25-fd861393f9a8n%40googlegroups.com >>> <https://groups.google.com/d/msgid/golang-nuts/724f4958-2fb4-4f08-ac25-fd861393f9a8n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> <Screenshot 2025-02-06 at 10.15.27.png> >>> <image (2).png> >>> >>> -- >>> 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 visit >>> https://groups.google.com/d/msgid/golang-nuts/3E08FAFE-4F65-4A7C-B3CB-DA2A456D068C%40ix.netcom.com >>> <https://groups.google.com/d/msgid/golang-nuts/3E08FAFE-4F65-4A7C-B3CB-DA2A456D068C%40ix.netcom.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 visit > https://groups.google.com/d/msgid/golang-nuts/CAMwNhAkX%2BZ%2BDKopCm13ZWgWXhtFvm_3OjKC5dOOWXUMtbHk2eg%40mail.gmail.com > <https://groups.google.com/d/msgid/golang-nuts/CAMwNhAkX%2BZ%2BDKopCm13ZWgWXhtFvm_3OjKC5dOOWXUMtbHk2eg%40mail.gmail.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 visit https://groups.google.com/d/msgid/golang-nuts/CANrC0Bg9V2dKRs%2Ba3Y8Mh2fnHB8RRdkMDrJbzBjDQfFy6HJC%3Dw%40mail.gmail.com.
