[hpsdr] Which CPU will be better for HPSDR?

[H.A.Meijer]

Hi Warren,


Thanks for the response to my questions.
I understand that the question is easier than the answer,
and that having both, high CPU clock and more CPU cores, would be the 
best way to go.

I just got a bit confused when I looked at the CPU benchmark list.
I see that the real high benchmark CPU's( like a Intel Xeon E5-2698 v3 @ 
2.30GHz )
got lower clock's (but more cores).

In the early day's, the fastest  CPU where the those with highest clock 
rates.

I will see if i can get some extra hobby funds (h.i) and then properly 
go for aIntel Core i7-5930K, 6x 3.50GHz.


Thanks,

73' Bert





Op 1-11-2015 om 11:46 schreef Warren C. Pratt:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Bert,
>
> First of all, even though I code some of the most performance-critical 
> algorithms, I must say that I don't have a definitive answer to your 
> question.  There are many factors involved.
>
> The openHPSDR PowerSDR application is multi-threaded and is becoming 
> even more-so as we move toward the new protocol.  So, there's no doubt 
> we benefit from more cores.  On the other hand, not all threads are 
> equally loaded; so, there is a benefit from raw CPU clock rate.  Other 
> factors that could be important are cache size and memory speed.
>
> Among the two processors you mention, I would probably slightly favor 
> the one with more cores and larger cache. However, as I said, it's a 
> difficult call.
>
> One thing is for sure:  as we develop/include new algorithms, compute 
> power requirements are increasing.  As an example, I had to "dumb 
> down" the new Spectral Noise Blanker because even on my system, one of 
> the fastest available, it wouldn't run at full speed.
>
> Fortunately, our openHPSDR system architecture allows us to keep 
> upgrading our computers to expand the possibilities for future 
> developments.
>
> 73,
> Warren  NR0V
>
>
>
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