n body crawling

Author	Message
Robby1959 Send message Joined: 1 Feb 13 Posts: 48 Credit: 66,724,440 RAC: 0	Message 67367 - Posted: 20 Apr 2018, 3:09:54 UTC n body is using little cpu and run time is hitting 13 days . any ideas ? ID: 67367 · Rating: 0 · rate: / Reply Quote

mikey Send message Joined: 8 May 09 Posts: 3339 Credit: 524,010,781 RAC: 0	Message 67371 - Posted: 20 Apr 2018, 12:17:33 UTC - in response to Message 67367. n body is using little cpu and run time is hitting 13 days . any ideas ? Pause the crunching and then resume it, if that doesn't help suspend it and then reboot the pc. If even that doesn't help you may just want to stop doing the n-body wu's until they figure out what the problem SOME people have running it. ID: 67371 · Rating: 0 · rate: / Reply Quote

melk Send message Joined: 10 Dec 17 Posts: 47 Credit: 695,662,962 RAC: 0	Message 67372 - Posted: 20 Apr 2018, 12:42:43 UTC Are n-body tasks for CPU? I didn't realize that. I have lots of cpu hosts I can dedicate to it if so. ID: 67372 · Rating: 0 · rate: / Reply Quote

Joseph Stateson Send message Joined: 18 Nov 08 Posts: 291 Credit: 2,461,693,501 RAC: 0	Message 67373 - Posted: 20 Apr 2018, 14:21:52 UTC - in response to Message 67372. Last modified: 20 Apr 2018, 14:29:55 UTC GpuGrid's quantum chemistry uses multiple CPUs but is Linux. I believe Amicable numbers also has a multiple cpu application. Also, you cannot take the initial waiting time, that 13 days, literally. It takes a while to determine how efficient the system is and usually the time drops significantly. My problem is older core 2 quads that barely keep up with feeding the Milkyway GPU tasks. I also noticed that when first attaching, or re-attaching, one can pick up an n-body even if you have checked the "DO NOT USE CPU". I posted about this over at BOINC since it is their scheduler (I am guessing) that asks for tasks before it checks the venues, resources, or restrictions. ID: 67373 · Rating: 0 · rate: / Reply Quote

melk Send message Joined: 10 Dec 17 Posts: 47 Credit: 695,662,962 RAC: 0	Message 67374 - Posted: 20 Apr 2018, 14:45:53 UTC Yeah I retired all my Core 2 Quads. Performance just isn't there for the energy cost. Even first gen Core is getting my stinkeye as I start to consolidate. Moving to Sandy as the bottom cutoff for desktop stuff. Found it's better still to just go multi-socket Xeon. LGA1366 is kinda iffy and is the bottom of what I will even consider. LGA20111 is plentiful and cheap on the used market. ID: 67374 · Rating: 0 · rate: / Reply Quote

Robby1959 Send message Joined: 1 Feb 13 Posts: 48 Credit: 66,724,440 RAC: 0	Message 67376 - Posted: 20 Apr 2018, 15:51:40 UTC thanks it used to run good cranked up the 4 core xeon'775 slot but lately low CPU usage and crawling . 12 days for one unit uugghh .right now I am running Gpu units . ID: 67376 · Rating: 0 · rate: / Reply Quote

mikey Send message Joined: 8 May 09 Posts: 3339 Credit: 524,010,781 RAC: 0	Message 67380 - Posted: 21 Apr 2018, 11:13:59 UTC - in response to Message 67374. Yeah I retired all my Core 2 Quads. Performance just isn't there for the energy cost. Even first gen Core is getting my stinkeye as I start to consolidate. Moving to Sandy as the bottom cutoff for desktop stuff. Found it's better still to just go multi-socket Xeon. LGA1366 is kinda iffy and is the bottom of what I will even consider. LGA20111 is plentiful and cheap on the used market. You have mail ID: 67380 · Rating: 0 · rate: / Reply Quote