Posts by 3rkko

41) Message boards : Number crunching : FAMOUS SUCCESS/FAILURE RATIO (Message 41509) Posted 19 Jan 2011 by 3rkko Post: Unfortunately Famous is currently the only model type available for Mac and Linux, so if you exclude Famous you will get no work at all.
42) Message boards : Number crunching : Last 11 FAMOUS "Error while Computing" - BORING (Message 41462) Posted 11 Jan 2011 by 3rkko Post: Is there going to be more FAMOUS tasks? Server status page shows only 211 WU's left, and it's the only model type available for Linux and Mac.
43) Message boards : Number crunching : Some PCs Trickling, Some Not (Message 41401) Posted 31 Dec 2010 by 3rkko Post: I have the same problem with my Linux box. It has not trickled since 28 Dec, even though Famous models are still running fine. Transfer tab is full of stuck uploads just like on my Windows machine, which is successfully trickling.
44) Message boards : Number crunching : Performance on hadcm3igeo "coupled" models (Message 41208) Posted 3 Dec 2010 by 3rkko Post: My credit rate for recent models are: CM3IGEO 24.9 credit/hour, AM3P_EU 25.1, AM3P_SAF 25.2, Famous 27.9, AM3P_PNW 28.0 I have only one CM3 model that is currently at 307 hours & 28.8% done, which indicates 1066 hour total time. All older CM3 models seem to be already archived so I can't make any comparison. The computer is AMD Phenom2 X6, Win7_64, 8GB RAM.
45) Message boards : Number crunching : FAMOUS SUCCESS/FAILURE RATIO (Message 41155) Posted 24 Nov 2010 by 3rkko Post: Another cold failure: http://climateapps2.oucs.ox.ac.uk/cpdnboinc/result.php?resultid=12234436
46) Message boards : Number crunching : Credit anomalies (Message 40469) Posted 1 Sep 2010 by 3rkko Post: I had 969,455 credits before the outtage (Boincstats), now only 735,528. Lost 233,927 or 24% of my credits :(
47) Message boards : Number crunching : NEW FAMOUS GRAPHICS (Message 40059) Posted 30 Jun 2010 by 3rkko Post: I suppose the CPU consumption of the new graphics really depends on what GPU you have. On my AMD Phenom2 X4 with Ati HD4850 the graphics use only 0 - 1% of CPU (or 0 - 4% of one core).
48) Message boards : Number crunching : German translation of CPU/GPU in account preferences (Message 39891) Posted 8 Jun 2010 by 3rkko Post: It is a translation error. You can confirm this by switching the language here: http://climateapps2.oucs.ox.ac.uk/cpdnboinc/language_select.php.
49) Message boards : Number crunching : No WUs available? (Message 39802) Posted 29 May 2010 by 3rkko Post: It seems to be working now. I got one new task two hours ago.
50) Message boards : Number crunching : No WUs available? (Message 39795) Posted 28 May 2010 by 3rkko Post: 29/05/2010 00:27:49 climateprediction.net Requesting new tasks 29/05/2010 00:27:54 climateprediction.net Scheduler request completed: got 0 new tasks 29/05/2010 00:27:54 climateprediction.net Message from server: (Project has no jobs available) I have both SM3 and AM3P selected and according to Server status page there is plenty of WUs. What\'s the problem?
51) Message boards : Number crunching : Wishlist: Add CUDA support (Message 39694) Posted 8 May 2010 by 3rkko Post: The text under the graph on the Nvidia marketing page you linked to reveals that even though the speed of the micro-physics kernel part increased significantly the overall program performance increased by only 25%. In addition, by going to the WRF page you can see that they are comparing a single-threaded CPU app to a multi-threaded GPU app. Also google Amdahl\'s law.
52) Message boards : Number crunching : FAMOUS SUCCESS/FAILURE RATIO (Message 39463) Posted 2 Apr 2010 by 3rkko Post: 2 success r212_599, r182_599 0 failure 2 in progress Phenom II X4 955, Win7 64
53) Message boards : Number crunching : Computer wasting multiple models (Message 39372) Posted 26 Mar 2010 by 3rkko Post: 996991 - 784 tasks! 970770 1055392
54) Message boards : Number crunching : Computer wasting multiple models (Message 39339) Posted 25 Mar 2010 by 3rkko Post: This Linux machine 1056341 has zero total credit and all 32 models have crashed with zero cpu time.
55) Message boards : Number crunching : Return of the AM3Ps (Message 39208) Posted 10 Mar 2010 by 3rkko Post: I have the same problem. Four failed downloads when attempting to fetch new work. http://climateapps2.oucs.ox.ac.uk/cpdnboinc/results.php?hostid=834476
56) Message boards : Number crunching : Return of the AM3Ps (Message 39058) Posted 27 Feb 2010 by 3rkko Post: Is the new Millenium model multithreaded? The old HadCM3 took three months. It would be nice if a quad core could do the same in three weeks.
57) Message boards : Number crunching : HADAM3P's too much RAC weight? (Message 38452) Posted 5 Dec 2009 by 3rkko Post: This Boinc wiki page explains how RAC is calculated for all Boinc projects. The official formula is: New_RAC = Old_RACweight + New_Credit(1-weight) where weight = e^(-ln(2)T/HL) But if you know math you can see that e^(-ln(2)T/HL) = 0.5^(T/HL) where HL = half-life = 604800 seconds (72460*60), and T is time since last RAC calculation. In the formula I posted earlier in this thread I changed the time from seconds to days which means HL=7 and, because CPDN calculates credit only once a day, I set T=1, which leads to weight=0.5^(1/7). You will obviously not find this modified formula in the code.
58) Message boards : Number crunching : HADAM3P's too much RAC weight? (Message 37986) Posted 11 Sep 2009 by 3rkko Post: The formula for RAC is: Old_RAC * 0.5^(1/7) + Today\'s_credit * (1-0.5^(1/7)) = New_RAC That is a weighted average so that more recent credit has a higher weight. It also means that your RAC has a half-life of 7 days. If you start with a RAC of 2350 and your daily output is 660 credit, then according to the formula your RAC should be 974 after 17 days. Your current RAC seems to be 965, pretty close.
59) Message boards : Number crunching : Weird Problem on one Host (Message 35838) Posted 6 Jan 2009 by 3rkko Post: Do you have 32bit libraries installed? http://boinc.ssl.berkeley.edu/wiki/Installing_on_Linux
60) Message boards : Number crunching : Model speeded up and then crashed! (Message 35745) Posted 23 Dec 2008 by 3rkko Post: The computer is not overclocked and there has been no recent hardware changes. I did however open the case and there was a decent amount of dust clogging the CPU heat sink. Those dustbunnies are now gone. The current model seems to be fine. The graphics window shows the Earth with nice warm colors so no iceball there. Thanks for your reply.

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