SMP Performance (Was: Re: Are hardware vendors starting to bail ... )

[User Freebsd]

On Thu, 13 Jul 2006, Jerry McAllister wrote:

>>
>>
>> On Jul 13, 2006, at 9:22 AM, Danial Thom wrote:
>>
>>> Simply enabling SMP on a single processor system
>>> adds 20-25% overhead in freebsd 6.1. Again,
>>> readily admitted/accepted by the developers.
>>> There is no way to recover that in efficiency, at
>>> least not for a long time.
>>
>> So don't enable SMP on a single cpu system.  Easy enough to avoid.
>> Chad
>
> Why would anyone want to enable SMP on a single CPU system anyway.

Actually, I believe all the new boot disks / ISOs are all SMP-enabled, so 
unless you build a custom kernel (some ppl do just run GENERIC ... I'm not 
one, mind you), you could be running an SMP-enabled kernel on a UP system 
without even knowing it ...

----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
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