Date: Tue, 15 May 2012 22:01:17 +0800 From: myrice <qqlddg@...il.com> To: john-dev@...ts.openwall.com Subject: Long Password Length Status Hi, all Here is my experiment with different length on xsha512-cuda format. THREADS: 512 BLOCKS: 1024 Length Many Salts(K c/s) One Salt(K c/s) 8 66584 30098 16 65925 28086 32 64023 22937 64 60531 17476 96 56909 13107 120 52844 13107 Chart: http://myrice.me/gsoc/xsha512_pass.png When password length large than 32, the performance decreases 4000k(~%6) per every +32. On my GeForce 9600M GS, I set THREAD to 512/4 BLOCKS to 1024*4, the data size transferred between CPU and GPU should be same. Length = 12 Benchmarking: Mac OS X 10.7+ salted SHA-512 [CUDA]... DONE Many salts: 1379K c/s real, 1379K c/s virtual Only one salt: 1248K c/s real, 1258K c/s virtual Length = 120 Benchmarking: Mac OS X 10.7+ salted SHA-512 [CUDA]... DONE Many salts: 1344K c/s real, 1344K c/s virtual Only one salt: 1156K c/s real, 1173K c/s virtual ~%2.5 slow down.
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