Posts by old

21) Message boards : climateprediction.net Science : Beta test model epoch (Message 628) Posted 10 Aug 2004 by old_user83 Post: > Can anyone please explain why a timestep should take longer - apart from the > radiation timesteps when we do some extra processing. I've never heard a > reasonable explanation of what the computer is actually doing which is taking > so long. I was intrigued as to what was the rational behind the HadSM3 model and how it works, so Iâ€™m not so sure that any of these are exactly what you require, but here goes: http://www.meto.gov.uk/research/hadleycentre/pubs/HCTN/HCTN_45.pdf (1.4 MB) http://www-atm.atm.ox.ac.uk/user/gillett/um/index.html http://www.climateprediction.net/board/viewtopic.php?t=2146 Iâ€™m still wondering about the computation side of things, maybe youâ€™ll have better luck than I! UK4CP @ www.uk4cp.co.uk (United Kingdom Group) Celeron 2.6GHz XP Pro SP1 768MB RAM
22) Questions and Answers : Preferences : Deferring Communication (Message 403) Posted 8 Aug 2004 by old_user83 Post: Hi GwydionT, I use Broadband in exactly the same way; so itâ€™s easier to monitor the kidsâ€™ usage! CPDN trickles statistics every 10,802 timesteps, although a complete phase is 259,248 timesteps, and of course there are 3 phases for each model. Even with your IP/ISP link disabled, when it becomes available this trickle information should find its way home to the CPDN central servers. So from the BOINC message log AFAIK the following messages indicate such communication: climateprediction.net - YYYY-MM-DD HH:MM:SS - Sending request to scheduler: http://climateapps2.oucs.ox.ac.uk/cpdnboinc_cgi/cgi climateprediction.net - YYYY-MM-DD HH:MM:SS - Scheduler RPC to http://climateapps2.oucs.ox.ac.uk/cpdnboinc_cgi/cgi succeeded To display trickle information follow the following trail from the http://climateapps2.oucs.ox.ac.uk/cpdnboinc/home.php web page: Your Account -> Results -> Result ID (Work Unit#) -> Trickle # (At bottom of page) This is the trickle information for one of my two Work Units allocated to the same machine: Trickle Information for Result # 193 Time Sent (UTC) Phase Timestep CPU Time (sec) Average 08 Aug 2004 05:53:13 1 32406 99390 3.0670246250694 07 Aug 2004 09:05:12 1 21604 66288 3.0683206813553 06 Aug 2004 12:26:30 1 10802 33236 3.0768376226625 I donâ€™t do anything with disabling BOINC network access when I connect or disconnect my ISP/IP connection. AFAIK, when my ISP/IP connection becomes active, the trickle information is registered. UK4CP @ www.uk4cp.co.uk (United Kingdom Group) Celeron 2.6GHz XP Pro SP1 768MB RAM
23) Questions and Answers : Windows : Duplicate accounts (Message 401) Posted 8 Aug 2004 by old_user83 Post: Hmmm, hopefully itâ€™s not possible to create a duplicate account with the same user name as a key. Did you receive a web page confirmation of your account ID or an Email to the Email address you registered your user with the following details? climateprediction.net URL: http://climateprediction.net Your account ID: Where your account is a unique alphanumeric string. Maybe your account is not activated yet and can be via the http://climateapps2.oucs.ox.ac.uk/cpdnboinc/account_created.php link, presuming you know your account ID. UK4CP @ www.uk4cp.co.uk (United Kingdom Group) Celeron 2.6GHz XP Pro SP1 768MB RAM
24) Questions and Answers : Windows : BOINC Start-up (Message 399) Posted 8 Aug 2004 by old_user83 Post: Hi poolball, You could also right-click on the BOINC program shortcut (Wherever you use it, maybe Startup folder, et al), select the Shortcut toggle and then select Minimized from the Run pull down menu, which usually has Normal Window as a default. UK4CP @ www.uk4cp.co.uk (United Kingdom Group) Celeron 2.6GHz XP Pro SP1 768MB RAM
25) Questions and Answers : Windows : Version number confusion (Message 185) Posted 6 Aug 2004 by old_user83 Post: The File and version info for the executables (boinc_cli.exe, boinc_gui.exe, boinc.dll and boinc.scr) is and 4.03 (4.3.0.0), although the CPDN model identifier is seemingly 4.02 (I.E. hadsm3_4.02_windows_intelx86). Maybe the website is slightly misleading or maybe I donâ€™t understand the naming conventions?
26) Questions and Answers : Windows : 2 WUs downloaded, but there is no sign of one of them (Message 166) Posted 6 Aug 2004 by old_user83 Post: Hi Pete, I also went for two WUâ€™s to test out the multi WU functionality. Mine are both downloaded and working OK, with two projects under climateprediction.net and slots 0 and 1. Weird, that for the same type of scenario we have two different results! I apologize in advance for this dumb question, but do you have two WUâ€™s in the Project display, each with a climateprediction.net tag and a nn.nn% Resource share; Then from a Work viewpoint, each hadsm3 4.02 application an Name (Unique model); Then from the Disk view two lots of climateprediction.net disk space usage @ ~55/56 MB? Do you have the following message for each WU? climateprediction.net - YYYY-MM-DD HH:MM:SS - Starting computation for result 00nn_0000nnnnn_0 using hadsm3 version 4.02 Maybe you need to Update or Reset Project the offending WU from the Projects dialog?
27) Questions and Answers : Windows : Positive CPDN BOINC Experiences - Windows x86 (Message 150) Posted 6 Aug 2004 by old_user83 Post: I thought it might be a good idea to document the positive and successful aspects of my BOINC CPDN experience thus far, while of course bugs or other issues are documented elsewhere. For me personally, then I only run CPDN from a DC viewpoint, so I have halted my current V 3.0.1 model, but decided to download 2 CPDN BOINC Beta projects, thus experiencing shared workloads, but in my case, for the same project, CPDN. Maybe some of these experiences can be incorporated into a BOINC CPDN FAQ? It would be great if we could report positive experiences for future CPDN BOINC users. * Installation and Settings * Very straightforward, up and running within ~5 minutes including download and install of BOINC CPDN 4.0.2 software and download of two CPDN projects. Carl has confirmed that an InstallShield type installation will be deployed for Public Release, so this will address the addition of Program Icons, etc. I just added a BOINC Program Group and ICON, and then copied the BOINC Program ICON to the Startup folder. I found that the 80/20 rule applied to the BOINC Preferences, and I had nothing or little to do from this viewpoint. Overall I found the Installation and Settings activities very easy with minimal impact. ** Performance After 16 hours running I find that I have processed ~30% more timesteps than I usually do via CPDN Classic. The BOINC Messages fields CPU time and to completion seem fairly accurate, although I havenâ€™t worked out the tolerances yet. From a HDD I/O viewpoint, I only ever created a separate Logical Drive for pagefile.sys under CPDN Classic and this remains as of CPDN BOINC, so no RAM Disk usage. I have found that from my HDD SMART diagnostics that the HDD operating temperature has reduced by ~10%+, even though yesterday was one of the hottest days and nights on my records, but was the lowest temperature my HDD has operated at since running CPDN. I never really used FileMon for CPDN classic so canâ€™t really comment on any file level activity differences. For me these performance characteristics are very welcome and indeed encouraging. BOINC Operations ** CPU benchmarks were processed AOK at first BOINC invocation and my 2 projects were allocated with no problems. The project options (Update, Attach, Web Site, et al.) have all operated AOK. My time-sharing options of 50/50 for each project has worked AOK, and processing (I.E. Preempting -> Resuming) is switched every hour for each project accordingly. I havenâ€™t trickled yet as my machine is not the most powerful, and Iâ€™m time-sharing between two projects.
28) Questions and Answers : Windows : Display bugs (Message 73) Posted 5 Aug 2004 by old_user83 Post: <img src="http://cpdn.tuxie.org/mikeymoss/Mikey_CPDN_BOINC_Beta_North_Pole_20040805.GIF"> Something different. Has anybody else noticed that CPU time is almost halted when interacting (I.E. changing/toggling the display) with the Show Graphics function.
29) Questions and Answers : Windows : Benchmarks (Message 57) Posted 5 Aug 2004 by old_user83 Post: I only played with BOINC 3.nn and SETI to familiarise myself ready for CPDN. I uninstalled BOINC 3.nn and then installed 4.02 and the automated benchmark ran OK and automatically for me, as per 3.nn, for example: 2004-08-05 17:19:25 - Running CPU benchmarks 2004-08-05 17:19:26 - Suspending computation and network activity - running CPU benchmarks http://climateprediction.net/ - 2004-08-05 17:19:53 - Project prefs: using your defaults 2004-08-05 17:20:27 - Benchmark results: 2004-08-05 17:20:27 - Number of CPUs: 1 2004-08-05 17:20:27 - 1629 double precision MIPS (Whetstone) per CPU 2004-08-05 17:20:27 - 3517 integer MIPS (Dhrystone) per CPU Maybe the problem is limited to upgrades as opposed to new installs?
30) Questions and Answers : Getting started : Running New and Old models together (Message 49) Posted 5 Aug 2004 by old_user83 Post: Yep, same performance improvement for me, although Iâ€™ve halted my V 3.0.1 model for the time being. My 2.6GHz Celeron Laptop has increased from ~15 TS/Min to ~20 TS/Min under BOINC. Maybe the FORTRAN compiler is providing some performance improvement, as per http://www.climateprediction.net/board/viewtopic.php?t=1237. I thought I recalled carl saying something like a~25% performance improvement, but I canâ€™t seem to find this commentary.

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Posts by old_user83