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Date: Wed, 18 Oct 2006 03:09:09 +0400
From: Solar Designer <>
Subject: Re: Compile for Linux guest on S39x

On Mon, Oct 16, 2006 at 10:45:48PM -0400, Nick Travis wrote:
> Has anyone tried to compile john on a linux guest running on an IBM
> z-series?

I know that some Linux distribution vendors are building JtR for s390
and s390x.  They use "make generic".

> I can successfully compile with a make generic,

Great.  I might want to add a specific make target for this platform
later on (after some code re-arrangements).  I'll contact you about that
(for testing), if you don't mind.  There's no performance improvement to
expect from that, though, as "generic" does a good job of selecting the
most suitable settings.

> but the results from ./john --test are pretty poor(results below).

What clock rate?  Can you please post /proc/cpuinfo off that system?

This looks like a fine 64-bit system at a fairly low clock rate (by
modern standards).

Alexander Peslyak <solar at>
GPG key ID: 5B341F15  fp: B3FB 63F4 D7A3 BCCC 6F6E  FC55 A2FC 027C 5B34 1F15 - bringing security into open computing environments

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