From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 References: In-Reply-To: From: =?UTF-8?B?5a2Z5LiW6b6ZIHN1bnNoaWxvbmc=?= Date: Thu, 9 Jul 2020 21:02:28 +0800 Message-ID: Subject: Re: How can I investigate the cause of "watchdog: BUG: soft lockup"? 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 Hi, Jan Thank you for taking the time to respond to me. >In general, system-level tracing can help in such scenarios to gain an >overview about what is going on. I googled and found many tools and methods. I am a little confused about which method(or tool) is the most suitable one for this matter(which one should I try firstly). Could you please give me some suggestions? Thank you for your attention to this matter. Best Regards. Jan Kiszka =E4=BA=8E2020=E5=B9=B47=E6=9C=889=E6=97=A5= =E5=91=A8=E5=9B=9B =E4=B8=8A=E5=8D=881:15=E5=86=99=E9=81=93=EF=BC=9A > > On 04.07.20 03:56, =E5=AD=99=E4=B8=96=E9=BE=99 sunshilong via Xenomai wro= te: > > Hi, list > > I encountered the error of "watchdog: BUG: soft lockup" when I sent > > data through the can bus. > > Could you please give me some hint on how to investigate the cause deep= ly? > > Thank you for your attention to this matter. > > From the backtrace, it is not yet clear to me which role Xenomai/I-pipe > plays here. Furthermore, it points to an out-of-tree CAN dri (advcan) > which makes it even harder to tell cause and effect apart. > > In general, system-level tracing can help in such scenarios to gain an > overview about what is going on. > > Jan