Date: Thu, 5 Nov 1998 21:09:48 +0000 (GMT) From: Phillip Salzman <psalzman@gamefish.pcola.gulf.net> To: Bill Paul <wpaul@skynet.ctr.columbia.edu> Cc: current@FreeBSD.ORG Subject: Re: Grrr... calcru: negative time blah blah blah Message-ID: <Pine.BSF.4.05.9811052108060.24174-100000@gamefish.pcola.gulf.net> In-Reply-To: <199811060024.TAA14156@skynet.ctr.columbia.edu>
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I get those same calcu errors. Except, I get them when I attempt to ``make buildworld'' or compile a lot of stuff that raises my load. This stops me, obviously. I am told they are a problem with APM, but took it all out of my kernel - still no luck. -- PhillipSalzman On Thu, 5 Nov 1998, Bill Paul wrote: > Recently, the EE department got a bunch of new Dell machines with > 450Mhz PII CPUs. This one particular system is an SMP box with 512MB > of RAM and a 3D Labs Fire GL 100 <mumble> adapter. Somebody installed > FreeBSD 3.0-RELEASE on this system (my brainwashing scheme is working! > Soon I will rule the wor--! Uh, wait. You didn't hear that.) and > discovered that this display adapter isn't supported by XFree86 (yet) > so they downloaded the XFCom_3DLabs server from somewhere. > > The system seems to run fin until they start this X server. The > server loads, but it does something unfriendly to the system that > produces the following errors: > > calcru: negative time of -36857 usec for pid 4036 (csh) > calcru: negative time of -51744 usec for pid 4043 (w) > calcru: negative time of -26704 usec for pid 4044 (ps) > calcru: negative time of -47557 usec for pid 4046 (reboot) > calcru: negative time of -46489 usec for pid 304 (hostname) > calcru: negative time of -24935 usec for pid 310 (ps) > > Also, the system becomes really slow at this point: keystrokes > are echoed on the console very slowly. Naturally, there's no source > for the XFCom_3DLabs X server. > > I built a kernel from the 3.0-19981103-SNAP distribution: this > changes the behavior slightly in that the calcru messages no longer > appear, however the X server crashes shortly after startup: > > pid 254 (XFCom_3DLabs), uid 0: exited on signal 6 (core dumped) > > And the system once again feels very slow and sluggish. This slowness > doesn't go away until the system is rebooted. > > I know this has been talked about before. This problem is 100% > reproducible with this X server. It happens with both an SMP kernel > and a UP kernel on the same hardware. Anybody have any clues how > to go about tracking this down? > > As an aside, I've only seen these messages once before on the Dell > PowerEdge 2300/400 machine that I've been using for driver development. > With the tulip clone chips, I managed to generate an interrupt storm > on several occasions which would foul up the machine pretty good. > Basically, the driver code would trigger an error interrupt of sorts > and the code that was meant to handle the interrupt would inadvertently > trigger the same interrupt over again, resulting in an infinite loop > condition. Once or twice I've done this late at night while sitting > at my terminal at home trying to remote test a driver on the machine > in the lab; since the machine is stuck and I can't reboot it from home, > I have to wait until I come to work the next morning to clobber it. > At times, when I come in, I see these same messages on the console. > I took this to mean that the interrupt storm was interfering with > the processing of clock ticks which botched the CPU accounting for > some of the daemon processes that were running when I triggered the > problem. > > Anyway. If anyone has any clues as to how to deal with this problem, > I'd love to hear of it. We may be stuck with these cards, and the > Powers That Be (tm) want to use FreeBSD on these systems for a course; > I'd hate to have to tell them that they'll have to make due with console > only mode. > > -Bill > > -- > ============================================================================= > -Bill Paul (212) 854-6020 | System Manager, Master of Unix-Fu > Work: wpaul@ctr.columbia.edu | Center for Telecommunications Research > Home: wpaul@skynet.ctr.columbia.edu | Columbia University, New York City > ============================================================================= > "It is not I who am crazy; it is I who am mad!" - Ren Hoek, "Space Madness" > ============================================================================= > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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