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https://issues.apache.org/jira/browse/TS-2395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13879474#comment-13879474
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David Carlin commented on TS-2395:
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I have tried to reproduce this, but I can't. I was using RHEL 6.4 with ATS
4.0.2. 'numactl -H' shows 2 nodes. I am just seeing the random slowness on
some requests now.
I used the same host that prompted me to write this bug, but I couldn't
reproduce :(
_spin_lock is no longer using all the CPU according to perf top:
6.26% [kernel] [k] _spin_lock
> Healthchecks plugin using 100% of CPU
> -------------------------------------
>
> Key: TS-2395
> URL: https://issues.apache.org/jira/browse/TS-2395
> Project: Traffic Server
> Issue Type: Bug
> Components: Plugins
> Reporter: David Carlin
> Assignee: Leif Hedstrom
> Fix For: 4.2.0
>
>
> I had configured the healthchecks plugin to serve four healthchecks - they
> come in pretty frequently, it can be hundreds per second. Use of the plugin
> would peg every core to 100% in htop. Response times for the healthchecks
> were often around 4 seconds.
> The code from master was used to build the plugin.
> perf top output showed the following:
> 87.74% [kernel] [k] _spin_lock
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