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World Community Grid Forums
Category: Support
Forum: Suggestions / Feedback
Thread: Hyperthreading takes a serious performance hit |
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Thread Status: Active Total posts in this thread: 12
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I'm seeing on dual xeons with and without hyperthreading, the ones with hyperthreading turned on are about half the speed.
Also, interestingly, I've got a dual tulatin system at 1.26Ghz with 1GB ram which is over twice as fast as my fastest xeon system at 3ghz @ 800fsb. Something seems amiss with the client. The dual xeon can handle a load of 3000+ domino/notes clients without skipping a beat, the dual tulatin couldn't handle 1000. thoughts?? |
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Alther
Former World Community Grid Tech United States of America Joined: Sep 30, 2004 Post Count: 414 Status: Offline Project Badges: 
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I'm seeing on dual xeons with and without hyperthreading, the ones with hyperthreading turned on are about half the speed. Also, interestingly, I've got a dual tulatin system at 1.26Ghz with 1GB ram which is over twice as fast as my fastest xeon system at 3ghz @ 800fsb. Something seems amiss with the client. The dual xeon can handle a load of 3000+ domino/notes clients without skipping a beat, the dual tulatin couldn't handle 1000. thoughts?? You're not seeing a performance hit with hyperthreading. Hyperthreading tricks the OS into thinking it has two processors when it really only has one. Currently, the agent is not SMP aware and so will only run on once processor. Therefore, when Windows shows you the CPU utilization, it will show 50% when hyperthreading is enabled because we're only using one "CPU". - Rick Alther
Rick Alther
Former World Community Grid Developer |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I am now for about 15 minutes a member and wanted to post the same, look @ this:
---------------------------------------- 50% wasted! A HT feature is maybe a suggestion for the next version! [Edit 1 times, last edit by Former Member at Nov 17, 2004 5:08:12 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I'm seeing on dual xeons with and without hyperthreading, the ones with hyperthreading turned on are about half the speed. Also, interestingly, I've got a dual tulatin system at 1.26Ghz with 1GB ram which is over twice as fast as my fastest xeon system at 3ghz @ 800fsb. Something seems amiss with the client. The dual xeon can handle a load of 3000+ domino/notes clients without skipping a beat, the dual tulatin couldn't handle 1000. thoughts?? You're not seeing a performance hit with hyperthreading. Hyperthreading tricks the OS into thinking it has two processors when it really only has one. Currently, the agent is not SMP aware and so will only run on once processor. Therefore, when Windows shows you the CPU utilization, it will show 50% when hyperthreading is enabled because we're only using one "CPU". - Rick Alther Well i know it doesn't give a 50% performance boost but in other DC project (except for RC5) it gives an aproximate boost of 1.4 |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
http://blakenyc77.tripod.com/udtweaker.html
----------------------------------------This tool also works with this project. I just tested it. Great :D Only uses LOTS of memory!   [Edit 1 times, last edit by Former Member at Nov 17, 2004 8:10:25 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Task manager looks crazy in that language, i will have to roll the bong again and ponder this one...
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I try that shortly, for now here the fastest of my dually xeon boxes before...
 If that tool works, I've got about a gig to spare... |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
OK, here is the after... it's running two copies but still not peaking out the system
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Here is by dual tulatin box before and after...
 Here is after...  So it works here for sure,,, my next test will be a single xeon with hyperthreading to see if the tweaker will see it as a dually |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Pconfig, thanks! that tweak works great!
Here is my single xeon before and after...  here is after  |
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