Posts by old_user60427

21) Message boards : Number crunching : Credit on some but not all trickles (Message 12319) Posted 5 May 2005 by old_user60427 Post: When first reading your answer and checking I though this was OK. I just looked in detail and found following: 04 May 2005 10:11:42 102841 786718 2sl0_300151672_1 1 118822 389005 3.2738 03 May 2005 20:15:10 133215 786718 2sl0_300151672_1 1 108020 339397 3.1420 01 May 2005 19:30:22 133215 786718 2sl0_300151672_1 1 97218 305394 3.1413 30 Apr 2005 23:26:42 133215 786718 2sl0_300151672_1 1 86416 271469 3.1414 29 Apr 2005 18:55:05 133215 786718 2sl0_300151672_1 1 75614 237305 3.1384 28 Apr 2005 15:31:34 102841 786718 2sl0_300151672_1 1 64812 216381 3.3386 27 Apr 2005 21:47:35 133215 786718 2sl0_300151672_1 1 54010 168939 3.1279 26 Apr 2005 14:22:45 133215 786718 2sl0_300151672_1 1 43208 134590 3.1149 25 Apr 2005 01:40:07 102841 786718 2sl0_300151672_1 1 32406 112968 3.4860 23 Apr 2005 17:29:14 102841 786718 2sl0_300151672_1 1 21604 78569 3.6368 23 Apr 2005 02:48:53 102841 786718 2sl0_300151672_1 1 10802 44326 4.1035 In other words, half of the trickles come from another Host. Inspection shows that this indeed another PC (diff operating system, diff CPU type). Looking at results sent in for that host I noticed that by coincidence (?) this one is working on a WU with very similar name: 2sa0_300151272_1 instead of 2sl0_300151672_1 (3rd position a instead of 'l'). Am I seeing ghosts or am I missing something
22) Message boards : Number crunching : Credit on some but not all trickles (Message 12195) Posted 1 May 2005 by old_user60427 Post: A major computer re-configuration prompted start on a new model two weeks ago. My stats show the credits I received for only half of the time-steps (43208, 54010, 75614, 86416). Going through boinc.log I see that computation was normal and that boinc talked to base every time ("Scheduler RPC to http://climateapps2.oucs.ox.ac.uk/cpdnboinc_cgi/cgi succeeded"). Still my account only shows half of the trickle results got credit. Why?
23) Questions and Answers : Unix/Linux : A less chatty CPDN (Message 11252) Posted 21 Mar 2005 by old_user60427 Post: I see in my boinc log that CPDN writes one line for every 30 minutes simulated. On my PC (AMD XP2800, Linux 2.6.8) this amounts to ~1100 lines in one hour real time. I find this overkill, but do not want to switch off logging because I want a log of boinc activities (switches to other clients, up- & downloads etc). Anyway to make CPDN less chatty?
24) Questions and Answers : Unix/Linux : climateprediction slow on linux boxes? (Message 11013) Posted 16 Mar 2005 by old_user60427 Post: > This is a BOINC issue. The benchmarks are meaningless in CPDN performance and > credit. With your system, the Linux and Windows compiled versions of CPDN > should perform very similarly on the same PC. > I am aware of the limited value of the BOINC benchmarks -- use an optimised BOINC executable myself (see http://www.pperry.f2s.com/index.htm or http://boinc.us.tt/) to minimse the issue a bit. I know that for SETI there is no difference between linux & windows --both science apps will run approx as fast on the same hardware. I did however just found out that the Einstein app is only running at ~50% of the speed under Windows, presumably because the math gets optimised much more under windows (better compiler). I am looking for another project (next to my main project, SETI), like the idea of CPDN, can probably manage the HD requirement, but am wondering how performance will compare across platforms (using one Windows & one Linux PC).

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