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Date: Mon, 27 Apr 2015 19:08:46 -0700
From: Bill Cox <>
To: "" <>
Subject: Re: [PHC] Re: Updated tests document (version 2)

On Mon, Apr 27, 2015 at 6:19 PM, Solar Designer <> wrote:

> On Mon, Apr 27, 2015 at 04:55:33PM -0700, Bill Cox wrote:
> > I see.  It does seem odd to ask the testing volunteer to create his own
> > interface to the candidates.
> >
> > I think there are just 3 candidates now supporting multiple threads.  It
> is
> > surprisingly hard to guestimate parallel thread performance from parallel
> > process performance.  The reasons remain mysterious to me, but the short
> > version is that each thread seems to want sole access to it's own page.
> > Mixing nearby read/writes between threads thrashes something, maybe the
> > translation lookaside buffer?
> >
> > I guess I'd like guidance from the PHC panel on this issue, if they want
> to
> > see multi-threaded performance.  It seems like an important attribute to
> > me, and there's no knob in the PHS interface.
> I would be interested, personally and as a panel member, to see those 3
> candidates' (is that Argon2, Lyra2, yescrypt?) multi-threaded
> performance included in Milan's reports.  Bill, maybe you can contribute
> to Milan's code?  I think it's all on GitHub, so perhaps you can make a
> pull request.

I've just forked the code, and I'll look into adding a PHS_thread or some
such thing.  Actually, it looks like the original Argon was enhanced to add
multi-threading, so technically there are four: Argon, Argon2 (i and d),
Lyra2, and Yescrypt.

> BTW, Argon2 is still not formally accepted.  Yet I'd like to see more of
> its benchmarks.

I do hope the panel accepts Argon2.  Without TwoCats in the competition, we
need Argon2d to keep you guys focused on bare metal performance :-)


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