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Date:      Tue, 16 Mar 2004 15:15:41 +0800
From:      Erich Dollansky <oceanare@pacific.net.sg>
To:        Artem Koutchine <matrix@itlegion.ru>
Cc:        freebsd-hardware@freebsd.org
Subject:   Re: Multiprocessor system VS one processor system
Message-ID:  <4056A99D.8090406@pacific.net.sg>
In-Reply-To: <026901c40b22$2c557c50$0c00a8c0@artem>
References:  <CD1C1AC62C4DA944914E36E7B3DD904313DB17@sestosrv004p.ad.octapharma.se> <002f01c4081c$bd720810$0c00a8c0@artem> <40568DC4.7020209@pacific.net.sg> <026901c40b22$2c557c50$0c00a8c0@artem>

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Hi,

Artem Koutchine wrote:

> Hm..
> Let me make up  a case.
>  Two boxes:
> 1) Dual CPU  X Mhz with Y KB of cache
> 2) Sinnge CPU with 2X Mhz and 2Y KB of cache
> 
> Which one is faster under FreeBSD? I think the
> second one, because SMP overhead is gone.
> 
It still depends on the program you run.

The individual task will be completed faster on system 2 but the 
overall performance will be better on system one.

System 2 has always to stop a task when switching to another one. 
System 1 can run two task at the same moment of time.

Erich



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