arm/arm64 ipipe performance

Greg Gallagher greg at
Tue May 18 20:28:15 CEST 2021

Hi Everyone,
   There's been a noticeable slow down in the arm and arm64 latency of
late.  I tracked the issue
 down to the tracing infrastructure.  For now if you hit this issue,
disable ftrace.  Once this is done the latency numbers look much better.
I'm currently working on resolving the issue.

  New patches will be released this week for both arm and arm64 now that
the issue is understood and a work around exists.



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