[mapserver-users] hyper-threading and performance

[Andy Colson]

Yeah, I've heard the same thing.  If your system is cpu bound then I'd 
bet the difference between enabled and disabled is minimal (regardless 
if the difference is faster or slower).  20% either way is not very much.

If your not cpu bound, I'd bet you see no difference at all.

Of course, these are hugely big guesses.  And probably wrong.  I dont 
have any numbers to share.  Sorry.

-Andy


On 2/8/2010 2:48 PM, Mark Volz wrote:
> Andy,
>
> To be more specific:
>
> I am using GeoMoose.  GeoMoose draws each layer separately so we do benefit
> by having a multi-core processor even if there is only one user.  We also are
> using a WMS Service so air photos is for the most part a non issue.  If my
> understanding is correct hyper-threading has up to a 20 percent increase in
> speed.  However, the performance increase is highly application specific and
> in some cases performance may actually be lower with Hyper-Threading enabled.
>
>
> Mark Volz
> GIS Specialist
> Lyon County, MN
>
> -----Original Message-----
> From: Andy Colson [mailto:andy at squeakycode.net]
> Sent: Monday, February 08, 2010 2:30 PM
> To: Mark Volz
> Cc: mapserver-users at lists.osgeo.org
> Subject: Re: [mapserver-users] hyper-threading and performance
>
> On 2/8/2010 2:20 PM, Mark Volz wrote:
>> Hello,
>>
>> Does anyone know if the performance of Mapserver is increased if
>> hyper-threading is enabled? If so how much?
>>
>> Mark Volz
>>
>> GIS Specialist
>>
>> Lyon County, MN
>>
>
> Hey Mark,
>
> What sort of usage are we talking?  Web hosting?  Shapefiles and arials?
>    I'm not sure if mapserver itself will use mult-threads, but if you
> have multiple requests comming into a website, apache/cgi/mapserver/etc
> will use multi process/threads/etc.
>
> Its tough to say the performance increase.  I'm host several maps on a
> dual-core box, and the cpu's sit around 2 percent.  And with lots of
> arial imagery you might hit disk io limit before you hit cpu limit.
> (However, I have had some mrsid files that were really cpu intensive to
> uncompress, they were cpu bound).  Are your cpu's even pegged?
>
> So, I guess, the answer is, it really depends on a lot of different
> variables.
>
>
> -Andy