Posts by M

1) Message boards : Number crunching : Unit using 1.5GB of RAM? (Message 67888) Posted 1 Oct 2010 by M Post: BOINC should be doing that automatically, and avoiding memory warnings and crashes. You may need to limit how much of the machine's page file space it is allowed to use, or expand the size of the swap space on the machine (which is probably what the warnings were about). I'm fiddling with boinc settings. Well, I'm running boinc on windows 7 64-bit, and prefer to not have the swap file accessed constantly with 8gigs to potentially 16gigs of wu's if all 8 threads are loaded at 1.8 gigs each. I'm thinking of chancing 4 threads. After getting memory warnings the machine becomes unstable and needs a reboot. M.
2) Message boards : Number crunching : Unit using 1.5GB of RAM? (Message 67861) Posted 29 Sep 2010 by M Post: Hmm... with these new gigabyte size WU's I'm having to scale back my 6gig i7 from 8 wu's to 4 wu's simultaniously. I've had repeated memory warnings & crashes. M.
3) Message boards : Number crunching : Discussion of the new credit systen (2) (Message 67807) Posted 24 Sep 2010 by M Post: And M one of the suggestions, by Dr A and staff, is to take your gpu credits and bring them DOWN to the cpu level, so the advantage of your gpu being able to do 30 times more work in the same amount of time, and get 30 times the credits, is muted. IMO if all this comes thru I think you will see a HUGE drop off in the number of Boinc crunchers. People crunch for both admirable and selfish reasons but one of them is for the credits. If you take that incentive away, what is the point in having a 6 million RAC?! And yes there are people with that much RAC and the machines to back it up. As with anything involving people, I agree there needs to be some type of incentive. All project credits could maybe be considered relative to themselves basicaly. (Ie: a GPU can take 1 1/2 minutes to calculate a wu, on a CPU it's in the area of 40 to 50 hours if I remember right for the same work unit x #cores in MW.) And you are right, some projects work very hard and invest money to optimize their code. Some less so, probably for any multitude of reasons. Cross-project comparisons might not be useful, but they are there with the current credit system. M.
4) Message boards : Number crunching : Discussion of the new credit systen (2) (Message 67798) Posted 24 Sep 2010 by M Post: Yeah, the credits given need to be balanced with other projects. Kinda trivial compared to the research I believe, but I think it would be appreciated by everyone. I crunch Rosetta & Milkyway mainly (1 CPU & 1 GPU app), and they are on complete opposit ends of the credits spectrum. (Not even taking into account the CPU vs GPU debate...) M.
5) Message boards : Number crunching : Hyper Threading or not? (Message 66905) Posted 14 Jul 2010 by M Post: Hi, Just chipping in. I have been running Rossetta on a i7-920 with 6gigs ram for a few months. This is what I observed : HT off CPU works on 4 WU's at once. HT on, CPU works on 8 WU's at once. I have not seen any time penalty from having HT on, it's practically a 100% improvement, I was quite impressed. CPU is a little warmer though with HT on & running at 100%, which from the improvements is gives, is understandable. Y.