Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
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Date: Tue, 29 Nov 2011 10:21:17 +0400
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: Re: AMD X6 multicore issue

On Mon, Nov 28, 2011 at 09:39:34PM +0200, Caesarmv wrote:
> 1) john-1.7.8-jumbo-8/run$ mpiexec -np 4 ./john ./pass.txt
> And it works well but uses only 1 core of 6.
> 
> 2) But when I tried to run:
> john-1.7.8-jumbo-8/run$ mpiexec -np 4 ./john --test
> It used 4 cores (100% usage).

Please post excerpts of output from the above commands - the "Loaded ..."
line and benchmark output for the same hash type.

> Compilation type is  *make linux-x86-64.*

Did you enable MPI or/and OpenMP in the Makefile?

> Could you please point me how to config it to work with several cores?

There are different ways, with their pros and cons.  You really got to
provide more info, such as on the hash type(s) you're interested in.
For generic answers, see:

http://openwall.info/wiki/john/parallelization

Alexander

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