[ut3] Negative Delta Time on Xen VPS

Rick Page mpcacrucesalus at gmail.com
Mon Jan 21 10:34:51 EST 2008


I was able to use taskset -p <process id> to see what its current affinity
was set to, and then use taskset -p 1 <process id> to set it to use
processor #0.
http://linuxcommand.org/man_pages/taskset1.html
-Rick

On Jan 21, 2008 9:00 AM, Rene Treffer <treffer at in.tum.de> wrote:

> Limiting to one cpu can be done with xen (set the cpu count/cpu) or by
> using cpuset. Should work with virtually any kernel that has these
> options enabled. The default CentOS kernel should come with cpuset
> support, I'm not sure about the xen kernel, though.
>
> Just google for tutorials.
>
> Rick Page wrote:
> > I have read in other similar posts that this can be caused by
> > multi-processor or multi-core processor systems. How do you force
> > ut3-bin to run off of one processor or one core? The fix at AMD's
> > website seems to be a Windows patch, is there a Linux patch hiding out
> > there somewhere? I am running CentOS 5.
> > -Rick
> >
> > On Jan 20, 2008 10:07 PM, Masher <lists at brainless.us
> > <mailto:lists at brainless.us>> wrote:
> >
> >     I'm not sure if this is the appropriate place to ask about this.
> >     I was going to post a bug report, but there wasn't a UT3 category
> >     in bugzilla.
> >
> >
> >
> >     I'm getting the following error message:
> >
> >
> >
> >     ScriptLog: Reset UTTeamGame_0
> >
> >     Critical: appError called:
> >
> >     Critical: Detected negative delta time - on AMD systems please
> >     install
> >
> http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_871_13118,00.html
> >
> >
> >     Exit: Executing UObject::StaticShutdownAfterError
> >
> >     Log: appRequestExit(1)
> >
> >
> >
> >     I'm running UT3 on a Xen virtual server.  It runs quite well, but
> >     dies with this message every 2-8 hours.
> >
> >
> >
> >     It's emulating intel hardware and runs on intel hardware.
> >     Provider is linode.com <http://linode.com>.
> >
> >
> >
> >     I get the same error with CentOS 5 and Fedora 8 on a 2.6.18
> >     kernel.  I've tried binding the process to one CPU, and it helps
> >     some in the frequency of how often it happens, but still crashes.
> >
> >
> >
> >     I'm open to trying anything to make it work.
> >
> >
> >
> >     Thanks!
> >
> >
>
>
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