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World Community Grid Forums
Category: Completed Research
Forum: Help Conquer Cancer
Thread: [RENAMED] Some concerns regarding the HCC project (page fault and poor performance, in particular (but not only) by multi-core hosts; #cores>2) |
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Thread Status: Locked Total posts in this thread: 210
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JmBoullier
Former Community Advisor Normandy - France Joined: Jan 26, 2007 Post Count: 3715 Status: Offline Project Badges: 
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courine,
----------------------------------------I don't want you to "write an apology to sheep", unless you want to publicly acknowledge that you used it as an insult. I have no problem either with "strong words" that English and US children learn at kindergarten anyway, while French children learn their equivalent in our écoles maternelles. But most children also learn very quickly when it is not appropriate to use them. And if you cannot "get your point across" without using them you might consider some (not military) communication training. Regarding your visit to this thread I simply regret that you had not created a specific one for expressing your concerns and left this one be what it was supposed to be. That's all. There is room for everybody in WCG, but please let's not mix everything or add confusion. Technical threads should remain technical and personal concerns should be kept in discussion threads. And by the way, I was already thinking the same before being nominated a CA.  |
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jal2
Senior Cruncher USA Joined: Apr 28, 2007 Post Count: 422 Status: Offline Project Badges: 
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Except that this thread is about a serious problem that many members seriously tried to investigate. My apologizes Jean & Mushball. For some reason, I thought Courine had started this thread, but I see that she did not. I agree that this is a problem which will hopefully be resolved soon. At this point, I seem to only have one machine which likes HCC (Athlon 64 3000+ w/1G DDR), although I do allow several others which get within 10% of the claimed points to continue crunching this project. It almost seems like the points calculation reverts back to the '_0' WU if the average value of the two results varies by more than a certain percentage, but I haven't determined the exact pattern yet. ---------------------------------------- [Edit 1 times, last edit by jal2 at Jan 27, 2008 11:46:22 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Meanwhile back at the issue
Sorry for the silence. We are investigating this problem. We are currently running some pair-wise tests to determine what is causing the slow down. What I mean by pair-wise is that we manually sending a workunit for FightAIDS@Home and a workunit for Help Conquer Cancer to the same two computers that have the characteristics that we want to check. For example here is the outcome of one of these tests: Computer #1 is my laptop. It is running a Intel Pentium M running at 2.0GHz with 2GB of DDR Ram Computer #2 is my home desktop. It is running a AMD Athlon 64 X2 5200+ running at 2.7GHz with 2GB of DDR2 Ram FightAIDS@Home workunit 'faah2961_ZINC00000480_xMut_md02740_00' had the following results: Computer #1 ran the workunit in 7.6 hours and claimed 83.238 credits for the workunit. Computer #2 ran the workunit in 6.1 hours and claimed 94.623 credits for the workunit (20% faster then the pentium M) Help Conquer Cancer workunit 'X0000046720001200502241630' had the following results: Computer #1 ran the workunit in 7.8 hours and claimed 85.014 credits for the workunit Computer #2 ran the workunit in 8.2 hours and claimed 128.109 credits for the workunit (5% slower then the pentium M) The next step we are going to do repeat this test but force the AMD dual core to only run one workunit at a time to see if eliminates the drop in performance for the dual core machine. Good to see some testing is taking place Kevin - it does seem to bear out what others are seeing with the units taking longer to crunch with multi-cores, and I believe it is exagerated the more cores there are, so maybe some comparisons with 4/8 core machines may be worth looking into. It is also nice for folks to see that this is not just a credit issue  Comparisons have also been made over at XtremeSystems too whilst this has been going on, so I'll throw this in the mix for you to maybe consider whilst investigating: I've said this in a bunch of other places. Running HCC on 64bit Vista with 64 bit BOINC version 5.10.28 has provided excellent results. Run time fall very close around an average of 2.7 hours apiece, page faults in the thousands. This page fault number is lower than I see on DDT or FAAH. I'm running it in ten quads........ And finally: [JmBoullier] And by the way, I was already thinking the same before being nominated a CA. Only just noticed - congrats Jean  |
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Sgt.Joe
Ace Cruncher USA Joined: Jul 4, 2006 Post Count: 7696 Status: Offline Project Badges: 
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Right on Mr. Bouiller. Congrats on the CA.
----------------------------------------Cheers (edit for appellation. Sorry about that)
Sgt. Joe
----------------------------------------*Minnesota Crunchers* [Edit 1 times, last edit by Sgt.Joe at Jan 28, 2008 2:51:21 AM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Felicitations M Boullier,
now pass the plonk.  |
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courine
Master Cruncher Capt., Team In2My.Net Cmd. HQ: San Francisco Joined: Apr 26, 2007 Post Count: 1794 Status: Offline Project Badges:
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look at the the title. You guys dont want 'better' days, you want 'beeter' days.
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Thats cos you misspelt it in the first place
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Congratulations Jean!
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JmBoullier
Former Community Advisor Normandy - France Joined: Jan 26, 2007 Post Count: 3715 Status: Offline Project Badges:
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Thanks for the congrats, and more, thanks for having tried to come back to the initial purpose of this thread, Ady (but it seems that it will be difficult
---------------------------------------- ).Two details about me: 1. Sgt Joe, I am a French "Jean", i.e. John for English speaking people. 2. As some of you have certainly noticed already my English was first academic but poor, then it became richer but mainly professional. The global result is that I am unable to enjoy jokes beyond what you would reasonably try in an international meeting. Sorry about that. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I am unable to enjoy jokes You will make an excellent CA then. (That was a joke BTW ) |
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