[jboss-jira] [JBoss JIRA] (JGRP-1716) Regression between 3.2.x and 3.3.x/3.4.x in Infinispan read simulation

[Divya Mehra (JIRA)]

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

Divya Mehra updated JGRP-1716:
------------------------------

    Labels: dm  (was: jdg620_dm)

    
> Regression between 3.2.x and 3.3.x/3.4.x in Infinispan read simulation
> ----------------------------------------------------------------------
>
>                 Key: JGRP-1716
>                 URL: https://issues.jboss.org/browse/JGRP-1716
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 3.3, 3.4
>            Reporter: Dan Berindei
>            Assignee: Bela Ban
>              Labels: dm
>             Fix For: 3.4.1, 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 of reads in scenario simulating Infinispan went down by ~10%. See the attached chart.
> * getall: the get request is sent to single node (randomly picked owner)
> * getfirst: the get requests are sent to 2 nodes with ResponseMode.GET_FIRST - the second response is discarded.
> .h5 Suspects:
> 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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