Re: Wierd slowdowns

Hmm, I thought this was new a couple of days ago when I first
read it too .. but in my half awake state this morning, it sounds
a little like the time() bug .. the one that the patch was written
for (the local time patch).  Didn't it end up with long on-cpu 
delays after random run-times (of up to days)?  Don't remember
who wrote the patch ... I did some experimenting with NTP about
18-24months ago to work the patch into CHAOS tho .. not that
this worked.




----- Original Message -----
>From: "Kris Buytaert" <mlkb-1zPVpAQ/[email protected]>
>To: 
>Subject:  Re: [openMosix-general] Wierd slowdowns
>Date: Sun, 05 Feb 2006 14:59:30 +0100
>
> On Thu, 2006-02-02 at 15:56 +0100, Jeroen Demeyer wrote:
> > Hello list,
> > 
> > I'm having a very strange problem where some processes just 
execute much 
> > slower than they should.  Let me explain: sometimes, for no apparent 
> > reason, a certain process takes much more CPU time than normal.  
For 
> > instance, a certain program normally finishes after about 1 CPU-hour, 
> > but sometimes it might take 30 hours or more.  With "CPU-hour", I 
really 
> > mean time spent on CPU (not real time), as reported by ps for 
example.
> > 
> 
> 
> > Also note that I don't see any particular correlation between this bug 
> > and openMosix, so it could be that openMosix doesn't have anything to 
do 
> > with it.  However, so far I have only seen this problem on the diskless 
> > 'slave' nodes, and not on the master node (with uptime of 58 days), 
> > which runs the same kernel.
> > 
> > If anyone has ever seen anything similar to this, please say so.
> I've never seen anything similar to this.
> 
> You mention "this node 32" , do you mean that it only happens on 1
> particular node or is it happening on more nodes ?
> 
> Also,  have you got an idea about the status of the network at that
> moment ?   It it more loaded than otherwise ? 
> 
> 
> greetings
> 
> -- 
> Kris Buytaert <mlkb-1zPVpAQ/[email protected]>
> 
> 
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--
Ian Latter
Late night coder ..
http://midnightcode.org/



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