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Date:      Sat, 11 Dec 2004 00:18:06 +0000
From:      "Colin J. Raven" <colin@kozy-kabin.nl>
To:        Lucas Holt <luke@foolishgames.com>
Cc:        FreeBSD Questions <freebsd-questions@freebsd.org>
Subject:   Re: [Fwd: HTT/SMP servers instability on 5.3-STABLE]
Message-ID:  <Pine.NEB.4.61.9.0412110015460.579@kenmore.kozy-kabin.nl>
In-Reply-To: <143963B7-4AFE-11D9-B1B3-000A95EFF4CA@foolishgames.com>
References:  <36661.194.210.13.66.1102680032.squirrel@194.210.13.66> <41B9F042.4040700@raad.tartu.ee> <Pine.NEB.4.61.9.0412101953340.579@kenmore.kozy-kabin.nl> <143963B7-4AFE-11D9-B1B3-000A95EFF4CA@foolishgames.com>

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On Dec 10, Lucas Holt launched this into the bitstream:

>
>>> 
>> 
>> Well thanks for sharing those observations. Until I read what you said I 
>> *assumed* that there was a performance difference with HTT enabled. The 
>> specs seem to show that there *is* a theoretical difference, yet clearly 
>> according to your observations there just isn't any difference of earth 
>> shaking proportions.
>> 
>> 
>
>
> I've got a dual xeon 2.0 ghz workstation.  I've tried running with and 
> without HTT enabled on it.  My observations were that it seemed to help 
> slightly with certain tasks but in general degraded system performance.  For 
> example, if i build a world to upgrade the OS it takes at least 30 seconds 
> longer with HTT enabled.  I tried it multiple times to verify it.  I even 
> tried it with different values for the j flag.  (3 4 5 and 6)
>
> Similarly, if i run it in windows with HTT enabled I noticed that windows was 
> peppy but it was a disaster during gaming.  Of course that makes sense as 
> most of my games are not designed for multiple cpus.  (enemy territory, quake 
> 3, Doom 3,  etc)  I also realize i could play some of them in fbsd, except my 
> radeon 9600 xt isn't supported for 3d acceleration!
>
>
>
This is *most* surprising but extremely useful information, many thanks 
for taking the time to impart first hand experiences.



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