Pete there are. Not sure how they correlate. Much better than a general CPU benchmark though.
The AMD 2700X at stock frequency, as a benchmark, runs about
1100-1200 decoders before RTTY SS starts to throttle. That should
work for the normal conditions. I seem to need about 400 decoders
per open & active band and another 50-150 for each of the
other bands with some activity. In peak solar condx, even this
horsepower is going to be marginal if leaving SS set on 5 bands x
192. Trimming back on the number of bands of course mitigates any
shortcomings though.
73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com
Jeff, what I was trying to point out is simply that judgments made several years ago, that RTTY Skimserv would stop even the strongest i7, perhaps need to be rethunk.
Is there an available benchmark for FPU capability?
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.On 1/5/2020 12:09 AM, Jeff Blaine wrote:
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.comOn 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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