KWSN Orbiting Fortress

A/C

There seems to be an issue of many windows operating systems with hyperthreaded and dual core CPUs not being correctly configured. It may make a difference in how fast your computer crunches. By how much I can't be sure, but optimizing your system for dual core/hyperthreading could make your system run faster. I'm interested to hear if anyone is aware of any real gains in crunching performance after fixing this.

Read:

http://forum.notebookreview.com/showthread.php?t=60416

Also:

Computers that are running Windows XP Service Pack 2 and that are equipped with multiple processors that support processor power management features may experience decreased performance

#ni-1

Hover · Squire Joined: 04 Jul 2004 Posts: 5

I have no idea if mine is optimized or not. If anybody tries it out and it works, please tell.
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Javapersona · Knight Joined: 09 Jul 2004 Posts: 88

I think I may have mentioned this before, so if I am repeating any of this, excuse me. It might be new for someone. Cool

AFAIK for multiple cores: defintely set up for both.

For Hyper Threading it usually depends on the size of your L2 cache. My experience is that if your L2 >= 1 MB, enabling HT is beneficial. If you have 512k, HT will decrease performance for most projects because the split (~ 512/2 =256) causes too many cycles for swapping at the cost of crunching.

My Xeons that have 512: Not using HT.

My P4's that have 1 MB: Using HT.

Hope that helps.

(Wish I had some dual cores to play with. #Scatter

)
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KWSN - Sir Brian C....... · Posted: Thu Oct 12, 2006 8:20 am Post subject:

Sir Magnus Barelegs · Posted: Wed Oct 25, 2006 6:14 am Post subject:

So now I have to go around and turn HT on when I get to the office today. #Afro

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KWSN - Sir Brian C....... · Posted: Wed Oct 25, 2006 6:21 am Post subject:

Sir Magnus Barelegs · Posted: Wed Oct 25, 2006 6:24 am Post subject:

KWSN - Sir Brian C....... · Posted: Wed Oct 25, 2006 6:31 am Post subject:

KWSN - Sir Brian C....... · Posted: Wed Oct 25, 2006 6:38 am Post subject:

I'm keeping any eye on these things......

http://www.intel.com/products/processor/core2quad/

or how about a macpro workstation running XP with a couple of these (Xeon 5300)

http://www.intel.com/pressroom/kits/events/idffall_2006/pdf/intel%20quad%20core%20processor%20update%20%e2%80%93%20sept.%202006.pdf
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Sir Magnus Barelegs · Posted: Wed Oct 25, 2006 6:33 pm Post subject:

Yeah I wish Core2Quad were out (and affordable) now.

I'm going to be replacing a number of older slower machines at home (see diodon, tuna, and bluegill) within the next couple of months and it will probably be with a new home-rolled dual Xeon box (dual core each, of course). So MythTV gets the priority on the processors but anything Myth doesn't want can be used for shrubbing.
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Sir Magnus Barelegs · Posted: Fri Oct 27, 2006 11:30 am Post subject:

OK I've been putting the SSE2 optimized clients on my Xeons today... had to take the BIG multi-xeon box out of the loop for awhile (shrubbing was apparently slowing down the real work it had to do and I got complaints).

I didn't see an optimized client for an Athlon64/Linux though. Is there such a beast? I'm just using whatever comes with Ubuntu Edgy when you apt-get install the boinc client.
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A/C · Posted: Tue Oct 31, 2006 2:05 am Post subject:

A/C · Posted: Tue Oct 31, 2006 2:28 am Post subject: