Re: DT_GNU_HASH latest patches

[Jakub Jelinek <jakub at redhat dot com>]

On Thu, Jul 06, 2006 at 07:53:29PM +0000, djamel anonymous wrote:
> Hello, i am writing you this time about the first variant.after looking at 
> the benchmark results i noted that there have been a reduction in the 
> number of l1 cache misses; a reduction in l1 cache misses means a win of 12 
> cycles ; the difference between the latency of l2 cache and that of l1 
> cache 15-3.on the other hand replacing a division by a binary and & is a 
> win of at least 25 cycles, so it think that avoiding tthe division in the 
> common case may improve performance.

I don't think it is the modulo that matters, but the smaller footprint
of .gnu.hash case in that case.  I have implemented what I think you meant
and the numbers actually convinced me.
So here is the new set of patches and new statistics.
take1 is 2006-06-28 state of things, take2 2006-07-03, take3 2006-07-05
and take4 what is attached here.

	Jakub

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