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Message-ID: <CANJ2NMNdmOGes+Zu3BsfS163e0TkZOZgjOy4pvv-UyrHsMM1jg@mail.gmail.com>
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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