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Re: SMP on windows2000

From: Don Jerman <djerman_at_dot.state.nc.us>
Date: Wed, 24 Jul 2002 14:28:30 -0800
Message-ID: <F001.004A1AE7.20020724142830@fatcity.com>


My understanding is "according to design" it should do it automatically. My experience is it does, sort of. But the app has to be multi-threaded (by the OS definition, not just context-mapped like Java green threads) for it to ever use more than one processor at the same time. If your single-threaded then for obvious reasons NT will tend to give the next time-slice to the same processor if it's not busy, so it looks like you're stuck on the same one much of the time.

With the task manager you can set "processor affinity" on MP machines from the right-click menu of the process. This limits which of the N processors will be used to schedule your process. So you can limit one processor hog to 1 or 2 processors and let the well behaved programs run freely on the others. I don't know how to do this using non-gui tools or to set it up at start time, and your userid has to have permission to do it (essentially you have to be running as the process owner). But it's a starting point for research :).

"Boivin, Patrice J" wrote:

> I am probably just complaining now, I think I know the answer already.
>
> Is it possible to force Windows2000 to "spread the load" for one application
> to 2 or more CPUs, from the OS side?
>
> Regards,
> Patrice Boivin
> Systems Analyst (Oracle Certified DBA)
>
> Systems Admin & Operations | Admin. et Exploit. des systèmes
> Technology Services | Services technologiques
> Informatics Branch | Direction de l'informatique
> Maritimes Region, DFO | Région des Maritimes, MPO
>
> E-Mail: boivinp_at_mar.dfo-mpo.gc.ca
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Boivin, Patrice J
> INET: BoivinP_at_mar.dfo-mpo.gc.ca
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Don Jerman
  INET: djerman_at_dot.state.nc.us

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
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Received on Wed Jul 24 2002 - 17:28:30 CDT

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