+- +-
Say hello if visiting :) by Gecko
11 Jan 2023, 07:43:05 pm

Seti is down again by Mike
09 Aug 2017, 10:02:44 am

Some considerations regarding OpenCL MultiBeam app tuning from algorithm view by Raistmer
11 Dec 2016, 06:30:56 am

Loading APU to the limit: performance considerations by Mike
05 Nov 2016, 06:49:26 am

Better sleep on Windows - new round by Raistmer
26 Aug 2016, 02:02:31 pm

Author Topic: Multibeam has arrived - please upgrade!  (Read 26169 times)

Furex

  • Guest
Re: Multibeam has arrived - please upgrade!
« Reply #15 on: 11 Aug 2007, 08:19:53 pm »
Karma has a funny way of getting even, you know...

I don't get it - what do you mean?

Offline Josef W. Segur

  • Janitor o' the Board
  • Knight who says 'Ni!'
  • *****
  • Posts: 3112
Re: Multibeam has arrived - please upgrade!
« Reply #16 on: 11 Aug 2007, 10:27:31 pm »
...
With 2.2B I had a 62.40 WU in ~3,800 seconds. (True angle range:  0.426461)
Now with 2.4, 54.16 Credits for ~5,700 seconds. (True angle range:  0.405621)

Or now the changed multiplier has SO LARGE effects??  >:(  :(  :'(
...

Yes, the difference in credits is due to the changed multiplier, and 0.426 Line feed work done with the new apps will also earn credits in the mid 50's. The difference in crunch time is because the 0.426461 is a Line feed WU, while the 0.405621 is a Multibeam WU.

Most users have noticed that Line feed WUs below 0.664 angle range have a much better credit/time ratio than those above that. The reason is that Pulse finding at 8192 FFT length isn't done above that, so the FLOP count drops abruptly, but crunch time doesn't decrease much. The 0.664 angle range is 8 times the Line feed beam width of 0.083. For Multibeam the same effect occurs at angle range 0.4 because it has a beam width of 0.05.

Sometime we'll get MB WUs with angle ranges below 0.4, there should be quite a few already in the data that's been gathered. They'll "pay" better.
                                                                Joe


 

Welcome, Guest.
Please login or register.
 
 
 
Forgot your password?
Members
Total Members: 97
Latest: ToeBee
New This Month: 0
New This Week: 0
New Today: 0
Stats
Total Posts: 59559
Total Topics: 1672
Most Online Today: 355
Most Online Ever: 983
(20 Jan 2020, 03:17:55 pm)
Users Online
Members: 0
Guests: 123
Total: 123
Powered by EzPortal