Date: Sat, 25 Apr 2015 22:35:51 +0200 From: Frank Dittrich <frank.dittrich@...lbox.org> To: john-dev@...ts.openwall.com Subject: Re: [GSoC] John the Ripper support for PHC finalists On 04/25/2015 08:41 PM, Agnieszka Bielec wrote: > on well with AVX2 I receive results: > > a@...l:~/jtr2/run$ ./john --test --format=pomelo --cost=0:0,0:0 > Will run 8 OpenMP threads > Benchmarking: POMELO, Generic pomelo [AVX2]... (8xOMP) DONE > Speed for cost 1 (N) of 0, cost 2 (r) of 0 > Many salts: 1704K c/s real, 213274 c/s virtual > Only one salt: 1055K c/s real, 132053 c/s virtual > > the difference is biggest for 0,0 costs also for 2,0 and 0,2 is a > difference of 24% and 17% > at this moment I don't know why this happens After pulling the latest changes up to commit a988a38c, I did reset BENCHMARK_LENGTH back to 0 to get these numbers. On one of my systems (i5-4570 CPU (4 physical, 4 logical cores, AVX2 build), the difference for --costs=2:2,2:2 is hard to notice. For --cost=0:0,0:0, it is 1.3%, for --costs=2:2,0:0, it is about 0.5%, for --costs=0:0,2:2 it is about 0.25%. On my laptop with Core(TM) i7-2820QM CPU (4 physical, 8 logical cores, SSE2 build), I get a 13% difference for --costs=0:0,0:0. The difference is about 9% for --costs=2:2,0:0, or --costs=0:0,2:2, and for --costs=2:2,2:2 it is about 8%. On this laptop, I tried to use short --test times, to avoid throttling So I used several runs of --test=1, but I'm afraid that throttling interfered nevertheless. After resetting BENCHMARK_LENGTH to -1, I get results for "Raw" that are similar to the "Many salts" case in my previous tests with BENCHMARK_LENGTH 0. Frank
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