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Date: Thu, 9 Aug 2012 17:29:18 +0200
From: Lukas Odzioba <lukas.odzioba@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: Current -fixes GPU formats vs TS

2012/8/6 magnum <john.magnum@...hmail.com>:
> form=pwsafe-cuda                  guesses:    0 unk unk : Expected
> count(s) (1485)  [!!!FAILED!!!]
> Self test failed (cmp_all(1))
>
> ...pwsafe-cuda sometimes crack 90% of the hashes though:
>
> form=pwsafe-cuda                  guesses: 1375 time: 0:00:13:34 :
> Expected count(s) (1500)  [!!!FAILED!!!]

I think that the root cause is somewhere near that:
-when i do not use gpu for cuda for some time and then run -test
-fo=pwsafe-cuda format fails self tests - just once, next run 1s later
and I got pass on self test and later it passes too for some good time
-when i run -test, format fails always

I thought that it is caused by lack of cuda_init but even after adding
it problem still remains. I tried to clean buffers at the init, check
for allocation errors and similar often bugs but everything seems to
be ok.
I spent some time on it yesterday, I am able to reproduce this bug by
running -test but it is not so trivial to get the idea what is wrong.
Now I am trying to do step by step reproduction and probably this will
help find the problem.

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