Posts by old_user17401

21) Message boards : Cafe CPDN : Scotland team (Message 35150) Posted 30 Sep 2008 by old_user17401 Post: Hi I think it\'s all nice keeping track of credits etc., but some do seem a bit obsessed about it. We\'re trying to help science here, though I guess if people treat it as a game to score points but do some good in the process no harm\'s done. Just my two Euro cents worth... e
22) Message boards : Cafe CPDN : Scotland team (Message 35130) Posted 29 Sep 2008 by old_user17401 Post: Hi Thanks for the reply. I have a HADCM (80 year), I guess it\'s still useful to run this in BOINC 5 / OS X. e
23) Message boards : Cafe CPDN : Scotland team (Message 35123) Posted 28 Sep 2008 by old_user17401 Post: Hi again. Ok, what the heck. I signed up for the beta program (why is it easier to find with Google than a link?). I\'ve got one beta model on my Mac now, and my resource share is 50/50 with cpdn vs cpdn beta. Cheers, Edward
24) Message boards : Cafe CPDN : Scotland team (Message 35116) Posted 28 Sep 2008 by old_user17401 Post: Hi mo.v, thanks for the message. Alas my Mac\'s just started anther 160 year model. I guess I could either abandon it (it\'s only done < 2% so-far) and get a beta model, or just get a beta model and swap between the two. Are the beta models as heavy as the 160 year ones? Unlike some team Scotland members, I have to make do with two CPU cores, not eight :) I could also set my PC to use beta models when the current two 160 year models complete in November. However, as you said, the Mac is probably more valuable here as it\'s rare in beta-land. Where do I find more info the beta project? Thanks, Edward
25) Message boards : Cafe CPDN : Scotland team (Message 35112) Posted 27 Sep 2008 by old_user17401 Post: Why thank you :) I should have 5 x 10^5 credits v. soon too.
26) Questions and Answers : Macintosh : Mac OS X vs XP? Or Merom vs Conroe? (Message 34058) Posted 12 Jun 2008 by old_user17401 Post: Here\'s the deal. I have a OS X iMac running a T7600 Merom Core 2 Duo at 2.33GHz, FSB 667MHz, cache 4MB, RAM 3GB. Average work unit speed for 160 year model is 1.27 secs / TS. Also I have a Win XP Pro SP2 machine, E6750 Conroe at 2.66GHz, FSB 1.33GHz, cache 4MB, RAM 2GB. Average speed 1.82 secs / TS. What gives? I\'m getting nearly 50% more speed from the notebook chipset than the desktop one? Neither machine is stressed with respect to RAM usage. Strange.
27) Questions and Answers : Macintosh : Error in Error message?? !! (Message 33914) Posted 25 May 2008 by old_user17401 Post: Hi Wow, you\'re running Intel BOINC under Virtual PC. As the G4 is trying to pretend to be an Intel chip using emulation (which is very, very inefficient), this is going to take an age. So slow, I\'m not sure it\'s worth the electricity. I have a G4 too, but I\'m not running BOINC on it. It\'s not that the computer is slow, it\'s just emulation is way too heavy for number crunching. Cheers. e P.S. I read this in a forum somewhere, they said they were quoting Microsoft but I can\'t be sure: Virtual PC uses the PowerPC\'s FPU to emulate the Pentium\'s FPU. The PowerPC uses 64-bit numbers, while the Pentium uses 80-bit numbers, so Virtual PC\'s calculations are not quite as accurate. To give you an idea of the accuracy: if you were using Virtual PC to calculate the national debt, AND for some reason you needed exponentiation in your calculations, AND instead of Excel or MS-BASIC, you used a third party accounting software the result will be well off (as yoiu suggest, on doing any kind of rounding at all, you would get the correct answer). P.P.S. Just read, the Altivec isn\'t as accurate as MMX, but standard G4 FPU work is fully compliant and won\'t cause accuracy errors.
28) Message boards : Cafe CPDN : Scotland team (Message 33702) Posted 7 May 2008 by old_user17401 Post: Hi Thanks for the replies folks, yes I feel better about it now :) e
29) Message boards : Cafe CPDN : Scotland team (Message 33683) Posted 5 May 2008 by old_user17401 Post: Hi http://climateapps2.oucs.ox.ac.uk/cpdnboinc/result.php?resultid=7201123 Add me to the hickups list. A 160 year model of mine died yesterday. Please don\'t mention the b**kup word. Just don\'t :) Edward
30) Message boards : Cafe CPDN : Scotland team (Message 32643) Posted 17 Feb 2008 by old_user17401 Post: I agree, alas I didn\'t have a backup, not least because the model ran correctly for a month after I replaced the faulty RAM with a good part and then crashed. Still, if I\'m not alone in having a client error with that work unit, I guess the model was at fault.
31) Message boards : Cafe CPDN : Scotland team (Message 32620) Posted 17 Feb 2008 by old_user17401 Post: Hi Another 80 year model out of the way. It would have been two, except the other exploded with negative pressure at about 75%. Could be the model, could be dodgy memory I had installed for about a week (alas). Another two 160\'s en route :)
32) Message boards : Number crunching : Bad memory (Message 32171) Posted 13 Jan 2008 by old_user17401 Post: Thanks. Just got another memory so-dimm, this time I soak tested it first and it looks good. The machine seems to be running reliably. Pity one dead bit out of 16 billion caused such chaos before! So now I\'m crunching with 3GB :)
33) Message boards : Number crunching : Bad memory (Message 31633) Posted 7 Dec 2007 by old_user17401 Post: My machine had 2GB of RAM. A week ago I removed 1GB to be able to add a new 2GB dimm. A few days later, I got periodic OS crashes etc, so I ran a program to thoroughly test the memory and lo and behold, yes the new dimm is faulty. The original 1GB dimm works fine. So I\'m back to a stable, tested 2GB (2x1) configuration. But I was crunching two 80 year climate models during this unreliable period. The models have survived this experience, but is the data still of value? They\'re both at about 30%.
34) Questions and Answers : Macintosh : Boinc 5.10.20 on OS X 10.5 9a581 (Message 31205) Posted 31 Oct 2007 by old_user17401 Post: If you\'re talking about Leopard as being the latest OS X, then it\'s far too new to know how it\'s handling BOINC. Could be lots of problems. Yup, could be. We\'ll see, I\'m running two 80 year models on it.
35) Questions and Answers : Macintosh : Boinc 5.10.20 on OS X 10.5 9a581 (Message 31198) Posted 31 Oct 2007 by old_user17401 Post: Just installed the latest Boinc on the latest OS X. Got two 80 year models downloaded. All seems to be well, except Activity Monitor is reporting all the CPU usage as normal, not \'nice\' - does that mean the work is not being done at a low CPU priority? The Boinc load did appear to be \'nice\'d under Tiger 10.4.10 .
36) Message boards : Cafe CPDN : Scotland team (Message 31168) Posted 29 Oct 2007 by old_user17401 Post: Well, just completed another 2 attribution models, 8 done in total. This was after 4 HadCM3 models on the same box. However, I will no longer have access to the machine later this week, so it\'s goodbye attribution project. I\'ll continue crunching HadCM3L on my iMac, two models are due to complete on that today too.
37) Message boards : climateprediction.net Science : Climate is too complex for accurate predictions (Message 31121) Posted 26 Oct 2007 by old_user17401 Post: (if you believe this article / paper) http://environment.newscientist.com/article.ns?id=dn12833 Agree or disagree, I\'m sure people will have opinions. Seems a bit defeatist to say we don\'t know so we can\'t know. I\'m going to continue crunching.
38) Message boards : climateprediction.net Science : Met Office plans next five years in climate science (Message 30485) Posted 11 Sep 2007 by old_user17401 Post: Looks interesting: http://www.theregister.co.uk/2007/09/11/climate_science/ I wonder if BOINC will be part of their plans?
39) Message boards : Number crunching : Forced download (Message 30119) Posted 22 Aug 2007 by old_user17401 Post: Assuming one did the suspend / get workunit / resume thing, I guess it doesn\'t matter if BOINC does a round robin between the two work units. The original one will finish soon enough, even if BOINC timeslices in the new one too. This way the machine will be constantly working which I guess is the most important goal.
40) Message boards : Number crunching : Finished crunching, 14MB remaining (Message 30094) Posted 20 Aug 2007 by old_user17401 Post: Hi, thanks for the advice. If I look here: http://climateapps2.oucs.ox.ac.uk/cpdnboinc/results.php?userid=17401 - I see four models completed successfully. For each of those models, should I be seeing a credit of 41472? It\'s not doing any harm me staying attached for a few days.

Previous 20 · Next 20