[jboss-jira] [JBoss JIRA] (JGRP-1716) The UDP receiver thread parsing messages causes performance regression

Wed Oct 16 05:01:02 EDT 2013

     [ https://issues.jboss.org/browse/JGRP-1716?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Radim Vansa updated JGRP-1716:
------------------------------

    Attachment: benchmark-jgroups.xml
                jgroups-udp.xml

Yes, the chart is based on results obtained with RadarGun. I am attaching the benchmark and JGroups configuration (just rename it to jgroups-udp-custom.xml) used to show the difference.
RadarGun can be checked out from https://github.com/radargun/radargun (you may want to change JGroups version in jgroups34 plugin's pom.xml from Beta1 to Final).

> The UDP receiver thread parsing messages causes performance regression
> ----------------------------------------------------------------------
>
>                 Key: JGRP-1716
>                 URL: https://issues.jboss.org/browse/JGRP-1716
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 3.4
>            Reporter: Dan Berindei
>            Assignee: Bela Ban
>             Fix For: 3.5
>
>         Attachments: benchmark-jgroups.xml, jgroups-udp.pdf, jgroups-udp.xml
>
>
> Comparing JGroups 3.2/3.3/3.4 performance with Radargun, the throughput went down by ~10%. (See the attached chart. "getall" means the get requests are sent to 2 nodes, "getfirst" means they are sent to only 1 node.)
> Erik Salter profiled his application and noticed that the message parsing in the UDP receiver thread seemed to slow things down. He wrote a patch that brought his throughput back to 3.2 levels: https://github.com/an1310/JGroups/compare/t_perfhack
> The UDP receiver thread may not tell the whole story, however: in the Radargun tests, performance with his patch was even lower.

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