v8.19: 3 different results

Message boards : SETI@home Enhanced : v8.19: 3 different results
Message board moderation

To post messages, you must log in.

AuthorMessage
Pollux_P3D
Volunteer tester

Send message
Joined: 9 Aug 12
Posts: 4
Credit: 224,134
RAC: 0
Germany
Message 59616 - Posted: 19 Sep 2016, 14:13:12 UTC
Last modified: 19 Sep 2016, 14:14:31 UTC

3 different applications v8.19
opencl_nvidia_SoG
opencl_ati5_cat132
opencl_ati5_nocal

3 different results

http://setiweb.ssl.berkeley.edu/beta/workunit.php?wuid=8898949
ID: 59616 · Report as offensive
Profile Raistmer
Volunteer tester
Avatar

Send message
Joined: 18 Aug 05
Posts: 2423
Credit: 15,878,738
RAC: 0
Russia
Message 59618 - Posted: 19 Sep 2016, 14:19:32 UTC - in response to Message 59616.  

SETI@Home Informational message -9 result_overflow
NOTE: The number of results detected equals the storage space allocated.

News about SETI opt app releases: https://twitter.com/Raistmer
ID: 59618 · Report as offensive
AMDave
Volunteer tester

Send message
Joined: 12 Jan 16
Posts: 38
Credit: 289,647
RAC: 0
United States
Message 59622 - Posted: 19 Sep 2016, 15:04:29 UTC - in response to Message 59616.  

For reference

CLick on the task #.  The overflow message (if present) will be under the folowing section.

    Work Unit Info:
    ...............

ID: 59622 · Report as offensive
Pollux_P3D
Volunteer tester

Send message
Joined: 9 Aug 12
Posts: 4
Credit: 224,134
RAC: 0
Germany
Message 59624 - Posted: 19 Sep 2016, 15:45:33 UTC

HAL9000 wrote:
One more thing to watch for are tasks that have the message:
SETI@Home Informational message -9 result_overflow
That message can indicate there was a lot of noise in the signal, probably from a satellite pass over the telescope. A large number of results can also be a clue to a processing device that is not operating normally. Such as a GPU overheating or other host PC weirdness.


Thanks Raistmer and AMDave
Accordingly, this Wu is useless.
ID: 59624 · Report as offensive
Richard Haselgrove
Volunteer tester

Send message
Joined: 3 Jan 07
Posts: 1451
Credit: 3,272,268
RAC: 0
United Kingdom
Message 59626 - Posted: 19 Sep 2016, 16:06:39 UTC

Overflows have existed and been recorded like that since the very start of the SETI@Home project.

With traditional linear applications, all quorum partners usually find the same signals in the same order, and the tasks pass validation at the first attempt.

Raistmer has explained several times (but unfortunately I don't have a message link handy) that SoG and similar variant applications don't necessarily process all parts of the task in the same order as traditional apps, and the different order of signal presentation can result in failure to validate immediately.

He has determined that the increased speed of SoG processing outweighs the inefficiency of requiring extra replications to complete validation.
ID: 59626 · Report as offensive
Richard Haselgrove
Volunteer tester

Send message
Joined: 3 Jan 07
Posts: 1451
Credit: 3,272,268
RAC: 0
United Kingdom
Message 59627 - Posted: 19 Sep 2016, 16:11:40 UTC - in response to Message 59624.  

Accordingly, this Wu is useless.

Not necessarily - maybe all those signals are ET's version of WOW!

It will be processed through validation as normal, until either two results match or the maximum allowed number of replications has been sent out and returned. If it validates, the signals will be recorded in the master science database like any other WU.

(or would be, if this was the main project. Since Beta is purely for application testing, I'm not sure whether any work done here has scientific value)
ID: 59627 · Report as offensive
AMDave
Volunteer tester

Send message
Joined: 12 Jan 16
Posts: 38
Credit: 289,647
RAC: 0
United States
Message 59670 - Posted: 22 Sep 2016, 16:48:11 UTC - in response to Message 59626.  
Last modified: 22 Sep 2016, 16:48:23 UTC

Raistmer has explained several times (but unfortunately I don't have a message link handy) that SoG and similar variant applications don't necessarily process all parts of the task in the same order as traditional apps, and the different order of signal presentation can result in failure to validate immediately.

He has determined that the increased speed of SoG processing outweighs the inefficiency of requiring extra replications to complete validation.

@Richard
Are either of these the message to which you referred?

ID: 59670 · Report as offensive

Message boards : SETI@home Enhanced : v8.19: 3 different results


 
©2021 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.