john-dev - sip_fmt_plug.c: non-optimal max_keys_per

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Message-ID: <20120629132926.GA31779@openwall.com>
Date: Fri, 29 Jun 2012 17:29:26 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: sip_fmt_plug.c: non-optimal max_keys_per_crypt for non-OpenMP

Dhiru -

Here's what I observe for non-OpenMP vs. OpenMP builds of
john-1.7.9-jumbo-6 on FX-8120:

Number of benchmarks:           202
Minimum:                        0.76235 real, 0.09553 virtual
Maximum:                        30.51791 real, 3.81904 virtual
Median:                         1.01479 real, 0.98287 virtual
Median absolute deviation:      0.02747 real, 0.03514 virtual
Geometric mean:                 1.71441 real, 0.77454 virtual
Geometric standard deviation:   2.08823 real, 1.50966 virtual

The 30x is for:

Ratio:  30.51791 real, 3.81904 virtual  SIP MD5:Raw

This is reproducible.  I guess the poor speed for non-OpenMP is because
the key count is too low (just 1, actually).  We need to tune it.

Alexander

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