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Message-ID: <20150826080617.GA4764@openwall.com>
Date: Wed, 26 Aug 2015 11:06:17 +0300
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: LWS and GWS auto-tuning
On Tue, Aug 25, 2015 at 08:36:44PM +0200, magnum wrote:
> Worst/best 10 for Tahiti (oldoffice failing):
> Ratio: 0.83409 real, 1.02941 virtual salted-sha1-opencl:Many salts
This one doesn't auto-tune. Gives same speeds to me.
> Ratio: 0.85046 real, 0.85934 virtual sxc-opencl, StarOffice .sxc:Raw
> Ratio: 0.90867 real, 0.78394 virtual blockchain-opencl, blockchain My
> Wallet:Raw
These two don't auto-tune. They use OpenMP. With
GOMP_CPU_AFFINITY=0-31, they give stable same speeds to me, regardless
of recent changes (obviously).
So all of the worst results for Tahiti (10% or greater slowdown seen in
magnum's posting) are actually spurious, not regressions of the
auto-tuning changes.
Alexander
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