Message boards :
Number crunching :
HT on or off?
Message board moderation
Author | Message |
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Mahbubur Send message Joined: 6 Apr 06 Posts: 10 Credit: 6,760 RAC: 0 |
I'm fairly new to DC, but should i have hyperthreading on or off when crunching? |
Geek@Play Send message Joined: 31 Jul 01 Posts: 2467 Credit: 86,146,931 RAC: 0 |
In life there are many truths. Faster is better.......... Bigger is better.......... HT on is better........... Boinc....Boinc....Boinc....Boinc.... |
Mahbubur Send message Joined: 6 Apr 06 Posts: 10 Credit: 6,760 RAC: 0 |
In life there are many truths. lol, ok thx |
Changeling Send message Joined: 24 May 99 Posts: 27 Credit: 14,433,218 RAC: 0 |
One thing to consider, if the computer is a laptop with a p4 intel chip, you may get overheating problems. My fastest cruncher is a laptop, when I turn on HT, it gets way too hot, and the fan screams all the time. I leave it off. Just my opinion. :-) |
Crunch3r Send message Joined: 15 Apr 99 Posts: 1546 Credit: 3,438,823 RAC: 0 |
In life there are many truths. Hmmm... well i think HT turned OFF is actually faster on Rnhanced WUs. IMHO that's what i'be seen but you can prove me wrong one that one. Join BOINC United now! |
Geek@Play Send message Joined: 31 Jul 01 Posts: 2467 Credit: 86,146,931 RAC: 0 |
In life there are many truths. You would certainly know better than I! If you can publish a reference work unit then I could prove it for myself. Thanks. Boinc....Boinc....Boinc....Boinc.... |
archae86 Send message Joined: 31 Aug 99 Posts: 909 Credit: 1,582,816 RAC: 0 |
[Over in Einstein, after initial skepticism, we have agreed that for some of akosf's wonderful optimized versions HT with both threads running Einstein is definitely less productive than the same host running Einstein with HT turned off for Prescott, Gallatin, and possibly other hosts. However, running HT under trux tx36 using the line: <priority_projects>Einstein@Home,SETI@Home</priority_projects> in truxoft_prefs.xml to force one Einstein and one SETI job at all times when work available continues to give wonderful enhanced productivity, even with akosf S41.07 (not the special HT version) and SETI enhanced 4.12 (crunch3r version). So if you like both projects, and don't mind a fixed 50/50 resource allocation (using the priority projects mechanism causes the preferences resource allocation to be ignored, I think) this is a highly productive move. |
W-K 666 Send message Joined: 18 May 99 Posts: 19012 Credit: 40,757,560 RAC: 67 |
@crunch3r But is it at least twice as fast? @Geek@play There is a reference unit on Marisan's site, Reference unit CPU time Comparison Which was used to test TMR's initial optimisation. @archae86 Been running dual P3 like that by having 'connect to network' setting at 0.05 days so only one unit of each project on computer at any one time for nearly a year, and for seti it gives boost of over 10% compared to running two seti units. Haven't looked at running two Einstein since akosf's optimisation. Andy |
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