Date: Wed, 12 Aug 2015 23:45:35 +0200 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: PHC: Argon2 on GPU On 2015-08-12 18:32, Agnieszka Bielec wrote: > I wanted to do tests on super but I discovered that final speed and > reported when computng gws differs, don't know which is good > > [a@...er run]$ ./john --test --format=argon2d-opencl --v=4 > Benchmarking: argon2d-opencl [Blake2 OpenCL]... > memory per hash : 1.46 MB > Device 0: Tahiti [AMD Radeon HD 7900 Series] > Calculating best global worksize (GWS); max. 1s single kernel invocation. > gws: 256 964 c/s 964 rounds/s 265.514ms per crypt_all()! > gws: 512 1878 c/s 1878 rounds/s 272.497ms per crypt_all()+ > gws: 1024 3447 c/s 3447 rounds/s 297.022ms per crypt_all()+ > Local worksize (LWS) 64, global worksize (GWS) 1024 > using different password for benchmarking > DONE > Speed for cost 1 (t) of 1, cost 2 (m) of 1500, cost 3 (l) of 1 > Many salts: 2925 c/s real, 307200 c/s virtual > Only one salt: 2898 c/s real, 307200 c/s virtual The benchmark figures (last two lines) are the correct ones. If you set up auto-tune correctly, that speed should be similar to the benchmark. For some formats/situations this is hard to achieve and it's just cosmetic anyway. magnum
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