RE: New Computer

[Doug Welch <welch@physics.mcmaster.ca>]

Tom,

A sanity check - did you see the -smp kernel booting up in the messages?

Cheers,
Doug

On Sat, 6 Sep 2003, Thomas Droege wrote:

> It is now pretty clear that my dual processor production machine is running
> on one CPU.  It only got a few more stars processed than a slower machine
> running the third pipeline.  This is consistent with running on one CPU. 
> Sigh!  How do I get second processors turned on?  What could have made it
> decide to turn off a processor?
> 
> Tom Droege
> 
> 
> > [Original Message]
> > From: Thomas Droege <tdroege2@earthlink.net>
> > To: tass <tass@listserv.wwa.com>
> > Date: 9/6/2003 1:02:08 PM
> > Subject: New Computer
> >
> > I just got my new dual processor computer and fired it up.  I ran top and
> > noticed that it did not show 2 CPUs.  This led me to look at my other dual
> > processor computer and notice that it too shows only one processor, I
> > recall that it used to show two.  Further, it shows each of the two
> > pipeline jobs as using 50% of the CPU cycles.  I recall that it used to
> > show near 100% for each of the two jobs.  
> >
> > I then went back and wrote a timing job for the new computer.  When I
> > started a second job, the speed of both slowed down by a factor of two. 
> > Further top shows both jobs running at 50%.   I thought with a two cpu
> > system it should take 3 jobs before the first two started to slow. 
> > (allowing for the system stuff)
> >
> > 1) How do I tell if they put two processors in the new box without opening
> > it up?  I cannot find anyplace in the Linux config stuff where it lists
> the
> > CPUs.  The bios does not say anything about enabling the second CPU.
> >
> > 2)  I notice the memory in top is shown as somewhat less than 1 GByte.  I
> > bought 2 Gbytes and 2 show up on the bios start screen. Should top show 2
> > GBytes?
> >
> > 3)  Has something happened to my dual processor production machine?  It
> > does seem to be going slower than I remember?  How can I test it while it
> > is running the pipeline jobs?
> >
> > I never cease to be amazed that modern computer systems work as well as
> > they do.  Still, I feel somewhat helpless when things like this happen.  
> >
> > Tom Droege
> >
> >
> >
> >
> >
> 
> 
> 

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