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Date: Sun, 10 Feb 2013 14:46:59 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: dmg-opencl speed

On Sun, Feb 10, 2013 at 02:23:52PM +0400, Solar Designer wrote:
> $ GWS=81920 LWS=256 ./john pw-dmg -i=all8 -form=dmg-opencl
> Device 0: GeForce GTX 570
> Local worksize (LWS) 256, Global worksize (GWS) 81920
> Loaded 1 password hash (Apple DMG PBKDF2-HMAC-SHA-1 3DES / AES [OpenCL])
> guesses: 0  time: 0:00:02:17 0.00%  c/s: 595  trying: scharin1 - stachmar
> 
> Now this is 595*250000*2 = 297.5M, which gets close to MSCash2's 311.3M.
> 
> Another:
> 
> guesses: 0  time: 0:00:04:35 0.00%  c/s: 595  trying: stachmas - meddriel
> 
> Stable speed, but it takes 2 minutes to get a status update.

HD 7970 needs similar tweaking, but it is more responsive (since faster):

$ GWS=81920 LWS=128 ./john pw-dmg -i=all8 -form=dmg-opencl -pla=1
Device 1: Tahiti (AMD Radeon HD 7900 Series)
Local worksize (LWS) 128, Global worksize (GWS) 81920
Loaded 1 password hash (Apple DMG PBKDF2-HMAC-SHA-1 3DES / AES [OpenCL])
guesses: 0  time: 0:00:00:51 0.00%  c/s: 1596  trying: scharin1 - stachmar
guesses: 0  time: 0:00:01:42 0.00%  c/s: 1597  trying: stachmas - meddriel
guesses: 0  time: 0:00:02:33 0.00%  c/s: 1598  trying: meddrien - 34046089
guesses: 0  time: 0:00:03:24 0.00%  c/s: 1598  trying: 34046038 - 41352114
guesses: 0  time: 0:00:04:16 0.00%  c/s: 1599  trying: 41352112 - 35252107
guesses: 0  time: 0:00:05:07 0.00%  c/s: 1599  trying: 35252105 - sprinand
guesses: 0  time: 0:00:05:58 0.00%  c/s: 1599  trying: sprinant - mckaynow
guesses: 0  time: 0:00:07:41 0.00%  c/s: 1599  trying: 49344449 - catien12
guesses: 0  time: 0:00:08:32 0.00%  c/s: 1599  trying: catien10 - 49051250
guesses: 0  time: 0:00:09:23 0.00%  c/s: 1599  trying: 49051256 - mantolf9
guesses: 0  time: 0:00:10:14 0.00%  c/s: 1599  trying: mantolfa - summacus
guesses: 0  time: 0:00:11:05 0.00%  c/s: 1599  trying: summacut - salev185
guesses: 0  time: 0:00:12:48 0.00%  c/s: 1599  trying: 47476508 - cryill08
guesses: 0  time: 0:00:13:39 0.00%  c/s: 1599  trying: cryill01 - 31066005

I am surprised it has not ASIC hung yet.

Default Adapter - AMD Radeon HD 7900 Series
                            Core (MHz)    Memory (MHz)
           Current Clocks :    925           1375
             Current Peak :    925           1375
  Configurable Peak Range : [300-1125]     [150-1575]
                 GPU load :    99%

Default Adapter - AMD Radeon HD 7900 Series
                  Sensor 0: Temperature - 86.00 C

GPU load occasionally drops below 99% - perhaps when AES is run on CPU.
(We'll need to interleave these or bring AES onto GPU later, but at
these high iteration counts it does not matter much.)

Alexander

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