[Skimmertalk] Improvement of CPU consumption by RTTY Skimserv

[Jeff Blaine]

The normal cpu benchmarks are worthless as predictors.  Look for 
something that is a reflection of the FPU capability.

That also explains why the Fx series were so poor.  They have 2 ALU for 
1 shared FPU.  All of the Intels (and the newer Amd) are 1:1 ALU:FPU.

73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com


On 1/4/20 8:49 PM, N4ZR wrote:
>
> Before the RU started, I had CW Skimserv running on one receiver of 
> the RP-16, and RTTY Skimserv running on the other, both with 8 bands x 
> 192 KHz  I forgot to rearrange the RTTY bands when the contest 
> started, although I did select the right Contest.ini contest.  What I 
> wanted to comment on is the much improved CPU performance I'm seeing, 
> compared with the last time I ran RTTY Skimserv in a contest.  
> Currently I have 339 decoders open on RTTY, and 444 spots in the last 
> half hour. It's running 63-67% CPU, with occasional excursions into 
> the 70s.  Meanwhile, CW is showing 410 decoders, with 340 spots in 30 
> minutes, and 6-8 percent CPU.
>
> I don't know how to account for this improvement.  It is a new 
> computer, running Windows 10 pro.  The processor is an  Intel Core 
> i5-8400 CPU @ 2.80GHz, 2808 Mhz, 6 Core(s), 6 Logical Processor(s).  
> The machine has 16 GB of RAM and a 512 GB solid state drive, and the 
> CPU has a passmark of almost 12,000.  My old Skimmer machine has an 
> AMD FX-8350 with a passmark of almost 9,000, but there really is no 
> comparison so far as RTTY performance.
>
> I'm wondering if others have had similar experience with the i5 or 
> similar, newer CPUs.  Perhaps they are better adapted to running the 
> RTTY Skimserv code for some reason.
>
> A postscript - I just cut the RTTY Skimserv back to 6 bands x 192KHz, 
> and it is now drawing 55-61 percent CPU with 401 decoders and 425 
> spots in the last 30 minutes.
>
> -- 
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
> at<http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
>
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