climateprediction.net home page
How many processes per task?

How many processes per task?

Questions and Answers : Windows : How many processes per task?
Message board moderation

To post messages, you must log in.

AuthorMessage
beneix

Send message
Joined: 21 Mar 07
Posts: 2
Credit: 263,796
RAC: 0
Message 44754 - Posted: 28 Aug 2012, 5:37:31 UTC

In my BOINC Manager, I only have one CPDN task showing, hadam3p_eu_84fe_2005_1_008164954_1. (I have set it to show both active and waiting tasks.)

However, in Process Explorer I see two processes:
    hadam3p_eu_um_6.09_windows_intelx86.exe (CPU 48.98, virtual size 1,127,180 K)
    hadrm3p_eu_um_6.09_windows_intelx86.exe (CPU 0, virtual size 1,054,624 K)


Only the first one is using any CPU but both are using about a GB of memory. The names differ by one character (hadrm3p instead of hadam3p).

Questions:
1. Is this how it should be?
2. Why are two processes needed?

Thanks.

ID: 44754 · Report as offensive     Reply Quote
Profile geophi
Volunteer moderator

Send message
Joined: 7 Aug 04
Posts: 2167
Credit: 64,475,494
RAC: 3,845
Message 44755 - Posted: 28 Aug 2012, 6:03:47 UTC - in response to Message 44754.  

Yes, there should be two tasks. The am3p task is the global portion of the model, the rm3p task is the high resolution regional part of the model. The global section runs for a day, and then the regional section runs for that same day with the boundary conditions from the global section. You can see the regional part of it when it is running by pressing the w key on the globe graphic.
ID: 44755 · Report as offensive     Reply Quote
beneix

Send message
Joined: 21 Mar 07
Posts: 2
Credit: 263,796
RAC: 0
Message 44756 - Posted: 28 Aug 2012, 6:28:46 UTC - in response to Message 44755.  

Thanks for the quick and clear response! Time to buy some more memory...
ID: 44756 · Report as offensive     Reply Quote
Profile Thyme Lawn
Volunteer moderator

Send message
Joined: 5 Aug 04
Posts: 1283
Credit: 15,824,334
RAC: 0
Message 44759 - Posted: 29 Aug 2012, 9:18:43 UTC - in response to Message 44756.  

Time to buy some more memory...

For application memory use you should be looking at working set size rather than virtual size. Only one of the global and regional worker programs will be running at any point in time and Windows will swap the idle one out if it needs the memory for anything else.
"The ultimate test of a moral society is the kind of world that it leaves to its children." - Dietrich Bonhoeffer
ID: 44759 · Report as offensive     Reply Quote
Profile old_user68949

Send message
Joined: 5 Apr 05
Posts: 5
Credit: 1,071,773
RAC: 0
Message 47556 - Posted: 13 Nov 2013, 7:13:32 UTC

My computer has stopped running climate tasks. Looking at my account, I see I have 20 or 40 tasks "in process", but none have started. This machine is running 3 other projects with no obvious problems. What is wrong?
Windows 7, Intel I7, NVidia 760, 8G ram half used, SSD half used.
ID: 47556 · Report as offensive     Reply Quote
Profile Dave Jackson
Volunteer moderator

Send message
Joined: 15 May 09
Posts: 4341
Credit: 16,497,933
RAC: 6,477
Message 47557 - Posted: 13 Nov 2013, 7:41:54 UTC - in response to Message 47556.  

SSD half used.


The bottle neck running CPDN tasks is the processor rather than the hard disk and running CPDN tasks on an SSD will severely shorten it's life for very little if any gain in the speed the tasks run. I didn't take this too seriously until my ssd on my netbook fell over!

With respect to the not running any cpdn tasks when I look at http://climateapps2.oerc.ox.ac.uk/cpdnboinc/results.php?hostid=1279076

(the tasks your computer has been sent) they are all either errored out or completed. If you look at a number of other threads on this board, there are no tasks or very few available at the moment and those that appear go very quickly with thousands of computers after them. I have been without work from CPDN for over three weeks now so am running WCG till I get more work from CPDN.
ID: 47557 · Report as offensive     Reply Quote

Questions and Answers : Windows : How many processes per task?

©2024 climateprediction.net