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Re: GMP 3.1.1 Alpha(21164) Linux(Debian 2.2) problems


From: Phil Carmody
Subject: Re: GMP 3.1.1 Alpha(21164) Linux(Debian 2.2) problems
Date: 29 Jan 2001 14:47:34 -0800

On Mon, 29 January 2001, Kevin Ryde wrote:
[SNIP - 'BogoMIPS' not recognised]
> Yes, you're quite right, we noticed this too, it'll be fixed in the
> next release.  In fact the next release will also have a scheme to
> measure the frequency if there's no value from the kernel.

I'm glad that GMP is turning over code more frequently nowadays, I look forward 
to the next release.

> > The second one I've not had a chance to look at yet (hey, I only
> > downloaded it an hour ago!).
[SNIP - alloca and ulimit]

And not read the FAQ... Sorry.

Anyway, on a more positive note, are you interested in a fixed 6.5% 
optimisation of mpn_popcount() (on 64 bit platforms - dunno about 32 bit ones)? 
I noticed "Robert Harley of Inria, France and David Seal of ARM, England, 
suggested clever improvements for population count." in the contributors 
section, and found myself unable to resist the temptation - I've been looking 
into bits-in-buckets for the last few weeks, and was sure there'd be room for 
improvement.

I don't know how you'd want me to submit the improvement - I have it all coded 
up and tested (hey, who needs a social life, I've got a new GMP to play with!) 
so can drop you a file, or context diffs, or whatever. 

Keep up the good work (I'm a prime freak - I need speed!)

Phil Carmody

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