Small question on cross compatibility

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Kiska
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Message 1764838 - Posted: 14 Feb 2016, 10:35:07 UTC

I just saw one of my units go inconclusive. And when I looked at the applications it was using, a Mac and a Windows PC was completing the task.
Since climate prediction changed their "policy" on which OS gets what units, it made me think is there something that can affect the results a different OS can compute. Since it was their reasoning that restricting units to one OS produces more reliable results for them.
The workunit: http://setiathome.berkeley.edu/workunit.php?wuid=2039160857
My computer: http://setiathome.berkeley.edu/result.php?resultid=4676649468
Mac computer: http://setiathome.berkeley.edu/result.php?resultid=4676649469
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Message 1764853 - Posted: 14 Feb 2016, 12:29:46 UTC

Sorry, I don't follow you - what exactly IS the question?
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Message 1764858 - Posted: 14 Feb 2016, 12:54:15 UTC - in response to Message 1764853.  

With how climate predication has restricted tasks to certain OS because it produces more reliable results. e.g. Weather@home to Windows
I am just asking would restricting OS for seti produce more reliable results?
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Message 1764864 - Posted: 14 Feb 2016, 13:43:10 UTC

A couple of answers.
Some projects have decided only to produce applications for one operating system, others have applications for a number of operating systems.
Unfortunately just now some of the SETI applications for MAC are not as good as they should be, in part this is due to the lack of people prepared to Beta test these before release.
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Kiska
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Message 1764867 - Posted: 14 Feb 2016, 13:47:52 UTC - in response to Message 1764864.  
Last modified: 14 Feb 2016, 14:03:11 UTC

I believe I have encountered many from 1 user who uses a mac whom I have named in the workunit in the OP. But the fact is Mac seems to be producing a rather large amount of errors. I would be willing to test if I had a mac....... Which I may soon, I might just buy one just for that purpose. Is there a specific model I should be buying for the test, I will obviously buy second handed. e.g. above 2008 model Macbook Or is hackintosh fine?
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Message 1764895 - Posted: 14 Feb 2016, 16:38:06 UTC - in response to Message 1764867.  

This is the Key, Darwin 11.4.2 SETI@home v8 v8.03 x86_64-apple-darwin
If you check back to the Version 7 SETI CPU tasks you will see the SAME OS had problems with the SSE41 and AVX Apps. That SAME OS didn't have problems with the SSSE3 App. My Guess is there is something about THAT OS which doesn't agree with the SETI CPU Code. The problem with the CPU Apps ONLY happens with OS Darwin 11.4.2. It is Well documented, EVEN at BETA, and usually involves the Intel 2600 CPU. All that is required to see the problem is to just Look at the Results, there are plenty about. It has Nothing to do with lack of testers at Beta.

As for the number of inconclusive results on the Mac nVidia MB OpenCL tasks, that too has a solution. But, as with the problem with OS Darwin 11.4.2 and the CPU tasks, no one appears to be concerned enough to fix the problem.
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Message boards : Number crunching : Small question on cross compatibility


 
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