From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 References: <82f01d0d-360b-0016-9aec-24ef5b1a8d6b@siemens.com> In-Reply-To: <82f01d0d-360b-0016-9aec-24ef5b1a8d6b@siemens.com> From: Greg Gallagher Date: Tue, 18 May 2021 15:06:52 -0400 Message-ID: Subject: Re: arm/arm64 ipipe performance Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jan Kiszka Cc: "Xenomai@xenomai.org" On Tue, May 18, 2021 at 2:49 PM Jan Kiszka wrote: > On 18.05.21 20:28, Greg Gallagher via Xenomai 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. > > Do you mean disabling during build? Or is the issue only present when > tracing is actively used during runtime? > > > > > New patches will be released this week for both arm and arm64 now tha= t > > the issue is understood and a work around exists. > > > > That's great! > > Jan > > -- > Siemens AG, T RDA IOT > Corporate Competence Center Embedded Linux Hi, I mean disabled during build time. That=E2=80=99s at least how I tested = to see that the issue went away. Hopefully I=E2=80=99ll have a solution soon. Thanks Greg