View Single Post
Old 2021-11-28, 23:43   #45
nordi
 
Dec 2016

23·3·5 Posts
Default

I also benchmarked four Zen2 cores (=1 core complex) working on 11977759 (FFT length in stage 2 768K) with B2=50,000,000 (which mprime modified a bit) and different RAM settings. The timings are for stage 2 init and stage 2 itself, plus the total time.

Code:
8.5 GB  10.8 + 315.6 = 326.4 seconds   B2=51,228,870
17 GB   24.6 + 165.7 = 190.3 seconds   B2=51,278,370
34 GB   43.4 + 138.3 = 181.7 seconds   B2=72,162,090
Doubling RAM from 8.5 to 17 GB gave 72% more throughput.
Doubling RAM again to 34 GB gave 5% more throughput at a much higher B2.
Even with 96GB available, mprime still used 'only' 34GB, so no more benchmark results. But still, this version wants LOTS of RAM and puts it to excellent use.

Last fiddled with by nordi on 2021-11-28 at 23:45
nordi is offline   Reply With Quote