See https://medium.com/@cpuguy83/non-blocking-i-o-in-go-bc4651e3ac8d
> On Jun 24, 2020, at 11:34 PM, Deepak Sirone <deepaksiron...@gmail.com> wrote: > > > Does that mean that I should have the sockets in non-blocking more and set > read deadlines on them? And also use the default case statement in select > statements? > >> On Tuesday, June 23, 2020 at 2:20:12 PM UTC-5, Robert Engels wrote: >> You need to keep the routines “hot” - use polling design... >> >>>> On Jun 23, 2020, at 11:33 AM, Deepak Sirone <deepaks...@gmail.com> wrote: >>>> >>> >>> I have a benchmark (process A) which launches another process (process B) >>> and the two send messages back and forth through a couple of sockets, one >>> for sending and the other for receiving. Both the processes have two >>> go-routines for handling the sending and the receiving side. >>> >>> Process A sends a message to B using the "encoding/gob" package to write to >>> the socket which is subsequently decoded. After sending a message, A waits >>> for a response from B. B does some processing on the message and sends a >>> reply back. >>> >>> The round trip time of getting a response time seemed to be highly >>> variable. I found that the runtime is taking up the bulk of the running >>> time. Also after receiving a message from B, the waiting go-routine takes a >>> long time to wake up, even taking 0.5x to 1x time as the actual round trip >>> time. >>> >>> Initially the round trip time is around 200 microseconds and it drops to 20 >>> microseconds as more messages are sent. The runtime seems to "learn" the >>> best way to minimize the running time eventually. >>> >>> How can I reduce the initial overhead incurred by the go runtime? Is there >>> a way to enforce or tweak the scheduling given the above scenario? >>> >>> Benchmark info from pprof: >>> >>> flat flat% sum% cum cum% >>> 93.87ms 33.56% 33.56% 98.80ms 35.33% syscall.Syscall >>> 79.91ms 28.57% 62.14% 79.91ms 28.57% runtime.futex >>> 7.15ms 2.56% 64.69% 54.69ms 19.55% runtime.findrunnable >>> 6.30ms 2.25% 66.94% 6.62ms 2.37% runtime.runqgrab >>> 3.22ms 1.15% 68.10% 3.22ms 1.15% runtime.(*randomEnum).next >>> 2.68ms 0.96% 69.05% 3.96ms 1.42% runtime.deferreturn >>> 2.32ms 0.83% 69.88% 2.38ms 0.85% runtime.lock >>> 2.30ms 0.82% 70.71% 2.30ms 0.82% runtime.memmove >>> 2.24ms 0.8% 71.51% 5.77ms 2.06% runtime.mallocgc >>> 2.21ms 0.79% 72.30% 2.22ms 0.79% runtime.unlock >>> 2.02ms 0.72% 73.02% 2.25ms 0.8% time.now >>> 2.01ms 0.72% 73.74% 8.63ms 3.09% runtime.runqsteal >>> 1.78ms 0.64% 74.37% 1.80ms 0.64% runtime.casgstatus >>> 1.63ms 0.58% 74.96% 3.38ms 1.21% runtime.exitsyscall >>> 1.60ms 0.57% 75.53% 33.05ms 11.82% runtime.stopm >>> 1.56ms 0.56% 76.09% 3.16ms 1.13% runtime.selectgo >>> 1.53ms 0.55% 76.63% 29.86ms 10.68% runtime.notesleep >>> 1.38ms 0.49% 77.13% 1.41ms 0.5% runtime.newdefer >>> 1.30ms 0.46% 77.59% 7.74ms 2.77% fmt.(*pp).doPrintf >>> 1.17ms 0.42% 78.01% 1.95ms 0.7% runtime.mapaccess2 >>> 1.03ms 0.37% 78.38% 75.87ms 27.13% runtime.schedule >>> 1ms 0.36% 78.74% 53.46ms 19.11% runtime.notewakeup >>> 0.83ms 0.3% 79.03% 2.34ms 0.84% runtime.deferproc >>> 0.78ms 0.28% 79.31% 1.64ms 0.59% runtime.chanrecv >>> 0.73ms 0.26% 79.57% 4.42ms 1.58% >>> encoding/gob.(*Encoder).encodeStruct >>> >>> Thanks, >>> Deepak Sirone >>> -- >>> 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. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/golang-nuts/b6c8a38d-5351-4abd-9755-b40bfafd256co%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/854ca65b-f3c6-4881-9001-487c61dcb256o%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/1C978786-F4EF-4A85-9294-1E8246701F2B%40ix.netcom.com.
