From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <47CBDC28.1020907@domain.hid> Date: Mon, 03 Mar 2008 12:08:24 +0100 From: Anders Blomdell MIME-Version: 1.0 References: <47C838A9.8040200@domain.hid> <2ff1a98a0802290958k3457d577j8e2ad01079612320@domain.hid> <47CBD35A.6030305@domain.hid> <47CBDA5B.70603@domain.hid> In-Reply-To: <47CBDA5B.70603@domain.hid> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] rt_cond_wait doesn't timeout (xenomai 2.4.1) List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: philippe.gerum@domain.hid Cc: xenomai-help Philippe Gerum wrote: > Anders Blomdell wrote: >> Gilles Chanteperdrix wrote: >>> On Fri, Feb 29, 2008 at 5:54 PM, Anders Blomdell >>> wrote: >>>> Hi, >>>> >>>> with xenomai 2.4.1 my call to: >>>> >>>> rt_cond_wait(&cond, &mutex, 1000); >>>> >>>> doesn't timeout (signalling works OK). Kernel version is 2.6.23.12, can it be >>>> due to CONFIG_NO_HZ=y, or have I misunderstood something? >>> What is your system timer setting ? Are you running in periodic or >>> aperiodic mode ? If aperiodic, 1000 ticks means 1000 ns, that is 1us, >>> so rt_cond_wait should return instantaneously. >> OK, here comes a simplified program that just outputs A, and then hangs. >> > > I can't reproduce this issue with your test code here, but this might be > the sign of some timer race depending on how fast is the hw. > > By hanging, I assume the box is still ok, right? > If so, could you please send the output of /proc/xenomai/stat, > /proc/xenomai/sched, /proc/xenomai/timer and /proc/xenomai/timerstat/master? > > TIA, > > cat /proc/xenomai/stat CPU PID MSW CSW PF STAT %CPU NAME 0 0 0 108606586 0 00500080 100.0 ROOT/0 0 0 0 54113426 0 00000082 0.0 rtnet-stack 0 0 0 1 0 00000082 0.0 rtnet-rtpc 0 22291 2 3 0 00300186 0.0 main 0 0 0 107816863 0 00000000 0.0 IRQ22: rt_eepro100 0 0 0 617309219 0 00000000 0.0 IRQ233: [timer] > cat /proc/xenomai/sched CPU PID PRI PERIOD TIMEOUT TIMEBASE STAT NAME 0 0 -1 0 0 master R ROOT/0 0 0 98 0 0 master W rtnet-stack 0 0 0 0 0 master W rtnet-rtpc 0 22291 1 0 0 master w main > cat /proc/xenomai/timer status=on+watchdog:setup=0:clock=8061167744254256:timerdev=lapic:clockdev=tsc > cat /proc/xenomai/timerstat/master CPU SCHEDULED FIRED TIMEOUT INTERVAL HANDLER NAME 0 1049107334 506070537 324149 - NULL [host-timer/0] 0 3358790 3358789 662553305 1000000000 xnpod_watch [watchdog] 0 1 1 - - xnthread_ti main -- Anders Blomdell Email: anders.blomdell@domain.hid Department of Automatic Control Lund University Phone: +46 46 222 4625 P.O. Box 118 Fax: +46 46 138118 SE-221 00 Lund, Sweden