Message boards :
Number crunching :
So what is SETI@home Enhanced??
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Geek@Play Send message Joined: 31 Jul 01 Posts: 2467 Credit: 86,146,931 RAC: 0 |
And why do I want to run it?? Boinc....Boinc....Boinc....Boinc.... |
MikeSW17 Send message Joined: 3 Apr 99 Posts: 1603 Credit: 2,700,523 RAC: 0 |
And why do I want to run it?? Because it's there... |
keeleysam Send message Joined: 17 Dec 03 Posts: 133 Credit: 60,478,373 RAC: 0 |
What is it? |
Rom Walton (BOINC) Send message Joined: 28 Apr 00 Posts: 579 Credit: 130,733 RAC: 0 |
Here are Eric's checkin notes for enhanced, as I understand it, the current client will be phased out, and this client will replace it. - Changed includes of C headers to includes of C++ headers. (i.e. we now include rather than ) - Modified malloc_a() to use native aligned allocation routines if available. - Removed explicit use of _aligned_malloc on _WIN32 platforms since malloc_a() will use _aligned_malloc(). - Defined type sah_complex which is compatible with the FFTW complex data type. Complex arrays that used to be defined a float arrays are now of type sah_complex. Code accessing these arrays has been modified where necessary. - Added mods to allow the function prototypes in sincos.h to work if these functions are present, but not in the system header. - Modified the method by which the chirp table is computed. The goal is to have the drift be less than 1 bin over the duration of interest to the analysis. In the case of gaussians that duration is 2 beam crossings. In the case of pulses it's one beam crossing. In the case of spikes it's one fft length. This should pick up 1.5 dB in sensitivity to gaussians, pulses and triplets. We could pick up another 0.25 dB with another doubling of this duration, but I think we've reached diminishing returns. - Replaced repeated allocations of WorkData in the main loop with one allocation prior to loop entry - Made main processing loop compatible with FFTW. The configure script now detects the FFTW library and header files and if both are available USE_FFTW is defined in "config.h". This define determines which FFT is used. ----- Rom BOINC Development Team, U.C. Berkeley My Blog |
Raven Send message Joined: 28 Aug 02 Posts: 373 Credit: 99,071 RAC: 0 |
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Geek@Play Send message Joined: 31 Jul 01 Posts: 2467 Credit: 86,146,931 RAC: 0 |
Thanks Rom for your reply. Sounds like a lot of good changes to the next seti cruncher. Also sounds like it will make obsolete the current user optimized clients. Boinc....Boinc....Boinc....Boinc.... |
Rom Walton (BOINC) Send message Joined: 28 Apr 00 Posts: 579 Credit: 130,733 RAC: 0 |
Well, it just means that their are new opertunities for further optimization. ----- Rom BOINC Development Team, U.C. Berkeley My Blog |
Paul D. Buck Send message Joined: 19 Jul 00 Posts: 3898 Credit: 1,158,042 RAC: 0 |
Well, it just means that their are new opertunities for further optimization. Well, if I understand it correctly, those of us that seem to be too thumb-fingered to use optimized clients will get faster processing ... I really like the looks of the improved gain ... I am not sure that many people will realize that 1 db is a lot ... quoting www.hometheatermag.com/glossary/: "A 3dB difference equates to a doubling of power" |
N/A Send message Joined: 18 May 01 Posts: 3718 Credit: 93,649 RAC: 0 |
"A 3dB difference equates to a doubling of power" [font='fixedsys,courier']en.wikipedia.org/wiki/Decibel[/font] |
Rayburner Send message Joined: 25 Nov 03 Posts: 18 Credit: 11,745,976 RAC: 0 |
When is the new app going to be released ? Rayburner |
The Gas Giant Send message Joined: 22 Nov 01 Posts: 1904 Credit: 2,646,654 RAC: 0 |
Doing the test project atm...initial observations are on my system. Wu estimated completion time is within 5% of actual completion time. Actual completion time is about 20% longer than non-optimised app. Progress is very non-linear near the start then slows down big time. Live long and crunch. Paul (S@H1 8888) And proud of it! |
W-K 666 Send message Joined: 18 May 99 Posts: 19048 Credit: 40,757,560 RAC: 67 |
quoting www.hometheatermag.com/glossary/: "A 3dB difference equates to a doubling of power" A 3dB difference can also mean a halving of Power. You always have to put in context or add a plus or minus sign. The formula is dB= 10*Log(base 10)Power Out/Power in Therefore if Power Out/ Power in = 2 (+3db)it would be an amplifier and if Power In/Power Out = 0.5 (-3db) the circuit would be attenuating (a loss). Andy |
Divide Overflow Send message Joined: 3 Apr 99 Posts: 365 Credit: 131,684 RAC: 0 |
When is the new app going to be released ? When the developers decide that it has passed the beta testing and is ready to be used on the main project. |
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