arm/arm64 ipipe performance

Greg Gallagher greg at embeddedgreg.com
Tue May 25 15:21:50 CEST 2021


On Tue, May 25, 2021 at 6:43 AM liandao <liandao at gmail.com> wrote:

> 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 xenomai.org> 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
> >


Yes the same for arm64. I believe I’ve found the issue but for this release
ftrace should not be included in the build to get optimal performance.

Thanks

Greg

>
>


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