Date: Tue, 3 Apr 2012 21:01:19 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: fast hashes on GPU On Wed, Apr 04, 2012 at 12:34:06AM +0800, myrice wrote: > I already thought of this. The fmt_self_test also calls set_key. It will > disturb the condition you said. I am thinking that for testing purpose, we > could set up a flag in bench_set_keys() or comment out fmt_self_test in > benchmark_format. This makes sense to me. > From cuda profiler, I see cuda_cmp_all(My new function, already push to > github) only occupied 0.5% time. You're transferring the computed hashes to the host anyway, right? You'd need to avoid that (postpone it to the time that the first get_hash*() or cmp_one() call is made - hoping that one won't be made). Anyway, I've just tried your code on my GTX 570 1600 MHz. Your original code from github with no changes: Benchmarking: Mac OS X 10.7+ salted SHA-512 CUDA [64/64]... DONE Many salts: 22053K c/s real, 22053K c/s virtual Only one salt: 14818K c/s real, 14818K c/s virtual sm_10 changed to sm_20: Many salts: 20072K c/s real, 20193K c/s virtual Only one salt: 13953K c/s real, 13953K c/s virtual Hmm, it became slower. More changes: #define BLOCKS 1024 #define THREADS 480 Many salts: 24192K c/s real, 24382K c/s virtual Only one salt: 17146K c/s real, 17146K c/s virtual Back to sm_10 (but keeping the BLOCKS and THREADS change): Many salts: 27162K c/s real, 26926K c/s virtual Only one salt: 18432K c/s real, 18432K c/s virtual BINARY_SIZE reduced to 8 (and other related changes): Benchmarking: Mac OS X 10.7+ salted SHA-512 [CUDA]... DONE Many salts: 52019K c/s real, 52019K c/s virtual Only one salt: 27403K c/s real, 27403K c/s virtual This is starting to look a lot better. I've attached the patch - please review and likely apply. Alexander View attachment "xsha512-cuda.diff" of type "text/plain" (3469 bytes)
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.