version go 1.7 On Thursday, January 19, 2017 at 5:25:36 PM UTC+8, Zeymo Wang wrote: > > I fork grpc-go uses as gateway just enioy h2c benifit (also remove pb IDL > feature),which I implement 0-RTT TLS( cgo invoke libsodium) repalce the > standard TLS and handle request just do http request to upstream; In > benchmark of bidirectional streaming rpc ,high cpu usage under not much > heavy load (maxConcurrencyStream = 100 or 1000 ,the same), according to "go > tool pprof ", I find syscall.wirte consume much cpu and RT ( maybe cgo > performance?). At least 3 time call system.wrtie (flush) will cause this > problem (header + data + status)?Is orignal grpc have this issue?how to > resolve or reduce invoke syscall.write？or waiting go add syscall.writev? > > > <https://lh3.googleusercontent.com/-0TCAcilsguw/WICDnBBHKBI/AAAAAAAAB_k/2OtJVaBq9ykgXPKboM43S8PWR1OXT59oQCEw/s1600/perf.jpg> > > > <https://lh3.googleusercontent.com/-2HXrQl6GgH0/WICENZODGQI/AAAAAAAAB_o/VUTPcgod4wQsI8Csoh7rVSBwcEe-n3yqQCLcB/s1600/strace.jpg> > > > > > <https://lh3.googleusercontent.com/-IV3cZmIFYso/WICD8niuwnI/AAAAAAAAB_g/liXcah0inB4RQJxujk57SYxfzmjaVCvgQCEw/s1600/pprof.png> > > > >
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