You can use taskset when starting the Go program to set the cpu affinity. > On Feb 9, 2022, at 12:56 AM, Fadhil Kurnia <fadhilikur...@gmail.com> wrote: > > Hi all, > > I am doing some latency measurement of a subprocess in Go. However I found > that Go program is unstable, especially when there is delay/gap between > process that I want to measure. Please see the example at > https://github.com/klauspost/reedsolomon/issues/180. It also happened in > other subprocess besides that reed-solomon encoding. > > I suspect, it was caused by the golang runtime scheduler. Other people, who > do research with prototype written in Go, also found the same issues. Here > are what they wrote in EPaxos Revisited paper, from NSDI'21: > "When investigating the factors that limit server throughput, we observed > several anomalies as servers neared saturation. Seemingly innocuous changes > could have a large impact on throughput. For example, increasing the num ber > of available cores caused throughput to drop. We believe that some of the > issues may come from unexpected behavior of Go’s thread scheduler. .... We > suspect that Go occasionally deschedules that thread in order to run > less-critical threads that listen for incoming messages." > > Do you have any recommendation on how to make the runtime scheduler more > deterministic? > > I tried to run the program with GOMAXPRCS=1 to limit the CPU usage, > minimizing golang scheduler to switch between CPU. However the documentation > says, it limit the number of thread used, thus the scheduler can still move > the thread from one CPU to another CPU. Is there any way to pin a go program > to a specific CPU? > > Thank you. > -- > 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/6f4f2d1f-c22e-4402-a887-3dc354d5dcd3n%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/F87AD613-6A86-41A2-8462-1F0519178F62%40ix.netcom.com.
