From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <581B57C4.8020609@numalliance.com> Date: Thu, 03 Nov 2016 16:29:08 +0100 From: =?UTF-8?B?U3TDqXBoYW5lIGFuY2Vsb3Q=?= MIME-Version: 1.0 References: <581A1E18.7040405@numalliance.com> <20161103093605.2228191c@md1em3qc> In-Reply-To: <20161103093605.2228191c@md1em3qc> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Subject: Re: [Xenomai] ipipe tracer question List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "xenomai@xenomai.org" On 03/11/2016 09:36, Henning Schild wrote: > Am Wed, 2 Nov 2016 18:10:48 +0100 > schrieb St=C3=A9phane ancelot: > > =20 >> Hi, >> I have got an RT task that seems being disturbed by some system >> driver. >> >> So, I have setted up ipipe tracer in kernel. >> =20 > The tracing uses the kernel tracing infrastructure. Use the > sysfs-Interface or a tool like trace-cmd or perf to collect traces. > https://www.kernel.org/doc/Documentation/trace/ftrace.txt > > =20 I am now able to trace in the kernel. I made some function trace in the shell, but I have not managed to find=20 where is my problem. I want to find where my tasks spend more time than usuallly. e.g. (end=20 task - start task) > 500us I have some references to cobalt_head_sysentry , cobalt_head_sys I made a trace with trace-cmd and I am able to load it with kernelshark. a bit difficult to understand the graph. >> But I do not know where to go now ? >> I suppose being on the right way, but what to do next ? >> >> Regards, >> S.Ancelot >> >> >> _______________________________________________ >> Xenomai mailing list >> Xenomai@xenomai.org >> https://xenomai.org/mailman/listinfo/xenomai >> =20