Program Hang on Some Work Units

Questions and Answers : Windows : Program Hang on Some Work Units
Message board moderation

To post messages, you must log in.

Bob Kluckhohn

Send message
Joined: 21 Nov 99
Posts: 11
Credit: 6,539,427
RAC: 5,529
United States
Message 1428741 - Posted: 15 Oct 2013, 0:44:11 UTC

Some of my SETI 7.00 work units seem to hang -- upwards of 36 hours computation time with 0.00% completion. Latest examples are 26fe09ac.29115.347946.4.12.223.vlar_1 and 28my08ae.3783.14796.6.12.61_1.
This seems to have begun when I received a message to the effect "SETI needs an additional 32Mb of disk space" a month or so ago. Must have been after the self-installation of 7.0 as an update. There have been no significant changes to my PC or software suite in that time. I tried increasing the disk space settings in BOINC but still got the message a time or two. Haven't seen it recently, though.
I have taken to aborting the stuck work units and SETI goes on to successfully run others in queue.
Would appreciate suggestions for a fix.
--Bob Kluckhohn
ID: 1428741 · Report as offensive
Profile BilBg
Volunteer tester

Send message
Joined: 27 May 07
Posts: 3720
Credit: 9,384,984
RAC: 663
Message 1428765 - Posted: 15 Oct 2013, 2:18:48 UTC - in response to Message 1428741.  
Last modified: 15 Oct 2013, 2:37:26 UTC

Happens on older AMD CPUs during 'Optimal function choice'
You can see table for 'Optimal function choices:' in your normal finished task and no table in your hang/Aborted task:

I have taken to aborting the stuck work units ...

Instead try:
[Suspend] the hang task (another task will start)
Wait a few seconds (10-60)
[Resume] the task

(it may not restart immediately but when it restarts it may pass OK the 'Optimal function choice' which is not task dependent.
'Optimal function choice' happens before the actual task processing.
So in fact the app 'hangs' - not the task

The real cure is to install Optimized SETI@home apps (known also as Lunatics apps/Installer)
They do not have 'Optimal function choice' and are faster.

(I hesitate to give you more directions as your last post before today was '2869 days ago'.
(Of course it may be that you only visit to read the forums and did not post for a long time.)
Optimized apps do not autoupdate - if you use them you will be responsible to inform yourself for new Optimized versions by visiting the forums.


- ALF - "Find out what you don't do well ..... then don't do it!" :)
ID: 1428765 · Report as offensive

Questions and Answers : Windows : Program Hang on Some Work Units

©2018 University of California
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.