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From "Justin Ross (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PROTON-1764) Slow performance seen when running Go client
Date Wed, 02 May 2018 22:26:00 GMT

     [ https://issues.apache.org/jira/browse/PROTON-1764?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Justin Ross updated PROTON-1764:
--------------------------------
    Labels: perf  (was: )

> Slow performance seen when running Go client
> --------------------------------------------
>
>                 Key: PROTON-1764
>                 URL: https://issues.apache.org/jira/browse/PROTON-1764
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: go-binding
>    Affects Versions: proton-c-0.18.1
>            Reporter: Aaron Smith
>            Assignee: Alan Conway
>            Priority: Major
>              Labels: perf
>
> Slower than expected message deliver rate seen while running simple benchmarking test. 
Setup:
>   Client(Go) Sender -> QPID Router -> Client Receiver(Go)
> Profiling of reveals that a large percentage of time is spent in wrapper call from Go
to c.
> Not sure if the call to C from Go is the issue.
>  
> Here's the pointer for sender/receiver (both uses qpid go-binding).
> Sender (with '-limit' option, it sends AMQP messages in 10sec for benchmarking):
>  [https://github.com/redhat-nfvpe/service-assurance-poc/tree/master/tools/sa-bench]
> Receiver (based on electron sample):
>  [http://kagaribi.s1061123.net/receive.go]
> Here are the results:
> {noformat}
> [root@nfvha-comp-01 sa-bench]# ./sa-bench -mode limit amqp://127.0.0.1:5672/collectd/telemetry
> sending AMQP in 10 seconds...Done!
> Total: 171908 sent (duration:10.000103521s, mesg/sec: 17190.62204096157)
> [root@nfvha-comp-01 electron_sample]# ./receive -prefetch 12 amqp://127.0.0.1:5672/collectd/telemetry
> Listening on 1 connections
> ^C2018/02/15 01:44:51 Total: 171908 received.
> 2018/02/15 01:44:51 captured interrupt, stopping profiler and exiting...
> {noformat}
> Both program can collect profile data using '-pprofile' option as following:
> {noformat}
> [root@nfvha-comp-01 sa-bench]# ./sa-bench -mode limit -pprofile profile.out amqp://127.0.0.1:5672/collectd/telemetry
> sending AMQP in 10 seconds...Done!
> Total: 189305 sent (duration:10.000111611s, mesg/sec: 18930.2887171546)
> [root@nfvha-comp-01 sa-bench]# go tool pprof sa-bench profile.out 
> File: sa-bench
> Build ID: 7ffec7b98a532892d7b9932b70b7451866cd4e5e
> Type: cpu
> Time: Feb 15, 2018 at 1:49am (EST)
> Duration: 10.11s, Total samples = 15.75s (155.79%)
> Entering interactive mode (type "help" for commands, "o" for options)
> (pprof) top5
> Showing nodes accounting for 9990ms, 63.43% of 15750ms total
> Dropped 200 nodes (cum <= 78.75ms)
> Showing top 5 nodes out of 144
>       flat  flat%   sum%        cum   cum%
>     6750ms 42.86% 42.86%     7080ms 44.95%  runtime.cgocall /usr/local/go/src/runtime/cgocall.go
>     1570ms  9.97% 52.83%     1590ms 10.10%  syscall.Syscall /usr/local/go/src/syscall/asm_linux_amd64.s
>      800ms  5.08% 57.90%      800ms  5.08%  runtime.futex /usr/local/go/src/runtime/sys_linux_amd64.s
>      440ms  2.79% 60.70%      770ms  4.89%  runtime.runqgrab /usr/local/go/src/runtime/proc.go
>      430ms  2.73% 63.43%     1070ms  6.79%  runtime.selectgo /usr/local/go/src/runtime/select.go
> [root@nfvha-comp-01 electron_sample]# ./receive -prefetch 12 -pprofile profile.out amqp://127.0.0.1:5672/collectd/telemetry
> Listening on 1 connections
> ^C2018/02/15 01:49:25 Total: 181422 received.
> 2018/02/15 01:49:25 captured interrupt, stopping profiler and exiting...
> [root@nfvha-comp-01 electron_sample]# go tool pprof receive profile.out 
> File: receive
> Build ID: 66addd89d429ca678cbd6e336872bc604406f83e
> Type: cpu
> Time: Feb 15, 2018 at 1:49am (EST)
> Duration: 14.78s, Total samples = 16.60s (112.31%)
> Entering interactive mode (type "help" for commands, "o" for options)
> (pprof) top 5
> Showing nodes accounting for 10620ms, 63.98% of 16600ms total
> Dropped 160 nodes (cum <= 83ms)
> Showing top 5 nodes out of 124
>       flat  flat%   sum%        cum   cum%
>     5730ms 34.52% 34.52%     5960ms 35.90%  runtime.cgocall /usr/local/go/src/runtime/cgocall.go
>     2190ms 13.19% 47.71%     2220ms 13.37%  syscall.Syscall /usr/local/go/src/syscall/asm_linux_amd64.s
>     1070ms  6.45% 54.16%     1070ms  6.45%  runtime.epollwait /usr/local/go/src/runtime/sys_linux_amd64.s
>      860ms  5.18% 59.34%     4430ms 26.69%  runtime.findrunnable /usr/local/go/src/runtime/proc.go
>      770ms  4.64% 63.98%     1130ms  6.81%  runtime.runqgrab /usr/local/go/src/runtime/proc.go
> (pprof) {noformat}
>  



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