Leif Hedstrom created TS-1951:
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Summary: Disabling accept thread causes high amount of kernel
spin-lock
Key: TS-1951
URL: https://issues.apache.org/jira/browse/TS-1951
Project: Traffic Server
Issue Type: Bug
Components: Core
Reporter: Leif Hedstrom
When testing various options, I noticed a problem where a kernel spin-lock
would consume a noticeable amount of CPU (like, half of all CPUs). This was on
a dual-socket 6-core system (so total of 24 logical CPUs, 12 physical and 12
HT). It would also peg one SIRQ handled (for /0) at close to 100%.
I tracked this down to disabling accept threads. I don't know why this is
happening, but it clearly shows that keeping accept-threads enabled is better.
The downside is that accept-threads currently experiences higher latencies.
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