[ut3] Negative Delta Time on Xen VPS

[Chris Brunelle]

I’m running Centos 5 as well and have the same problem (among others).  When
I use taskset, the server is stable and won’t crash, but the idle CPU usage
hovers around 75%.  Join the game and players pings are 200+ and it’s
unplayable.

 

--Chris

 

   _____  

From: Rick Page [mailto:mpcacrucesalus at gmail.com] 
Sent: Monday, January 21, 2008 8:35 AM
To: ut3 at icculus.org
Subject: Re: [ut3] Negative Delta Time on Xen VPS

 

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.
HYPERLINK
"http://linuxcommand.org/man_pages/taskset1.html"http://linuxcommand.org/man
_pages/taskset1.html
-Rick

On Jan 21, 2008 9:00 AM, Rene Treffer <HYPERLINK
"mailto:treffer at in.tum.de"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 <HYPERLINK
"mailto:lists at brainless.us"lists at brainless.us

> <mailto:HYPERLINK "mailto:lists at brainless.us"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
>     HYPERLINK
"http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_871_13118,
00.html"
\nhttp://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 HYPERLINK "http://linode.com" \nlinode.com <HYPERLINK
"http://linode.com" \nhttp://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!
>
> 



---
To unsubscribe, send a blank email to HYPERLINK
"mailto:ut3-unsubscribe at icculus.org"ut3-unsubscribe at icculus.org
Mailing list archives: HYPERLINK
"http://icculus.org/cgi-bin/ezmlm/ezmlm-cgi?64"
\nhttp://icculus.org/cgi-bin/ezmlm/ezmlm-cgi?64



 

No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.19.8/1235 - Release Date: 1/21/2008
9:39 AM


No virus found in this outgoing message.
Checked by AVG Free Edition. 
Version: 7.5.516 / Virus Database: 269.19.8/1235 - Release Date: 1/21/2008
9:39 AM
 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://icculus.org/pipermail/ut3/attachments/20080121/4fe7095f/attachment.htm>