[jboss-jira] [JBoss JIRA] (JGRP-2056) Measure latency for RPCs

[Bela Ban (JIRA)]

     [ https://issues.jboss.org/browse/JGRP-2056?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bela Ban updated JGRP-2056:
---------------------------
    Attachment: bla.java


The attached program shows max latencies are mainly dominated by GC. Ue -Xloggc:/tmp/dump.txt to see when there's a collection and the max value will be bigger than that collection. Investigate increasing the new (still called eden in 8?) space.

> Measure latency for RPCs
> ------------------------
>
>                 Key: JGRP-2056
>                 URL: https://issues.jboss.org/browse/JGRP-2056
>             Project: JGroups
>          Issue Type: Task
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 4.0
>
>         Attachments: bla.java
>
>
> Measure latency for single-thread tests between a sender and a receiver, and identify potential slow-downs. Look at
> * message bundlers at the sender and
> * message batch handling at the receiver
> This needs to be done for both requests and responses.
> Perhaps provide a way for callbacks to be invoked to measure the latency, e.g. request sent (dest, ID), response received (ID), so that tests like IspnPerfTest could collect them and create histograms.



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