arm/arm64 ipipe performance

liandao liandao at
Tue May 25 12:43:54 CEST 2021

hi greg gallagher,
    is this mean:the ipipe-core-5.4.119-arm64-2 released on 5/23 also
should turn off ftrace when config kernel?

On 5/19/21, Greg Gallagher via Xenomai <xenomai at> wrote:
> 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.
> Thanks
> Greg

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