Stalled tasks.


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Questions and Answers : Unix/Linux : Stalled tasks.

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Tangerineboy
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Message 980237 - Posted: 17 Mar 2010, 21:55:19 UTC

I am getting quite a few of these across three of my machines. The task will be sat a percentage in to its computation but will be stuck, closing and restarting boinc has no effect on this "stuck" status. I also get the occasional task that just fails to start. Anyone else come across this ?

The machines are all on FreeBSD 8.0 Release amd64

example http://www.tangerine-army.co.uk/seti.jpg

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Message 980398 - Posted: 18 Mar 2010, 5:52:58 UTC - in response to Message 980237.

Someone else got that as well, but on the Mac.

What happens when you exit BOINC fully and restart it?
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Tangerineboy
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Message 980472 - Posted: 18 Mar 2010, 12:35:07 UTC

Well I did try killing the boinc_client process and then restarting it. The stuck units were still stuck, aborting them gets the computer moving again. I will double check next time I see a stuck wu that all seti stuff is shutdown and restarted and see if that makes a difference.

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Message 980493 - Posted: 18 Mar 2010, 13:40:31 UTC - in response to Message 980472.

Wondering if this is the AMD hang? Do you run optimized apps? the generic app from seti can cause AMD CPU's to hang. I can't remember if this is a windows problem or if it hits all OSes
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Tangerineboy
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Message 980551 - Posted: 18 Mar 2010, 16:45:51 UTC

I installed the latest version from the FreeBSD ports collection, I also run seti on Phenom II x4 955 using windows 7 Pro 64bit and I have not seen the problem arise on this system.

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Message 981011 - Posted: 19 Mar 2010, 16:54:24 UTC - in response to Message 980551.
Last modified: 19 Mar 2010, 16:55:57 UTC

IMHO, such stuck looks as a result of using binary, compiled from initially-working source which assumes any compilator defaults - with the other version of compilator (and other defaults).

For example, initial variant of 64-bit openSUSE kernel in the 11.3 milestone 3 works if compiled by GCC 4.4.3 and doesn't with 4.4.4 - this GCC versions used different default aligning of "struct"s, 8 and 32, coordingly.

Such tasks (endlessly looping after writing baseline smoothing into the stderr.txt), are common for the stock 6.03 application of the SETI@home Beta project with 64-bit versions of Ubuntu 9.10 and openSUSE 11.2

Tangerineboy, with such binary I see no other way as abort them.

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Message 984175 - Posted: 27 Mar 2010, 0:42:34 UTC
Last modified: 27 Mar 2010, 1:05:51 UTC

I have been looking at optimised apps,

http://lunatics.kwsn.net/index.php?module=Downloads;sa=dlview;id=91

I will give this a whirl and see if it makes a difference

Questions and Answers : Unix/Linux : Stalled tasks.

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