Otto van der Schaaf created TS-2992:
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Summary: EThread schedule fast_signal default
Key: TS-2992
URL: https://issues.apache.org/jira/browse/TS-2992
Project: Traffic Server
Issue Type: Task
Components: Core
Reporter: Otto van der Schaaf
Attachments: ethread.patch
For ats_speed, changing the fast_signal argument's default from false to true
in I_EThread::schedule helped improve latency when scheduling an event from an
external thread pool (up to 5 ms per scheduled operation).
This ticket at least documents this fact, and can perhaps serve as a discussion
point. Perhaps it's worth it to make a setting out of this hard coded default.
I'm not sure that setting fast_signal to true would be a good idea in general,
as there probably is a cost to it. It was working fine for us though, and
considering ats_speed's cause (leaning towards favoring user agents) I think it
can sometimes be beneficial.
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