From owner-cvs-all  Sat Mar 17  5:27:43 2001
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To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/alpha/include types.h src/sys/i386/include types.h src/sys/ia64/include types.h src/sys/powerpc/include types.h src/sys/kern vfs_cache.c src/sys/nfs nfs.h nfs_node.c src/sys/sys fnv_hash.h 
In-Reply-To: <200103170931.f2H9V7h77652@freefall.freebsd.org> 
Date: Sat, 17 Mar 2001 05:27:38 -0800
From: Peter Wemm <peter@netplex.com.au>
Sender: owner-cvs-all@FreeBSD.ORG
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X-Loop: FreeBSD.ORG

FWIW; this is not a final implementation or API yet, I have made further
tweaks/fixes.

Peter Wemm wrote:
> peter       2001/03/17 01:31:06 PST
> 
>   Modified files:
>     sys/alpha/include    types.h 
>     sys/i386/include     types.h 
>     sys/ia64/include     types.h 
>     sys/powerpc/include  types.h 
>     sys/kern             vfs_cache.c 
>     sys/nfs              nfs.h nfs_node.c 
>   Added files:
>     sys/sys              fnv_hash.h 
>   Log:
>   Use a generic implementation of the Fowler/Noll/Vo hash (FNV hash).
>   Make the name cache hash as well as the nfsnode hash use it.
>   
>   As a special tweak, create an unsigned version of register_t.  This allows
>   us to use a special tweak for the 64 bit versions that significantly
>   speeds up the i386 version (ie: int64 XOR int64 is slower than int64
>   XOR int32).
>   
>   The code layout is a little strange for the string function, but I was
>   able to get between 5 to 10% improvement over the original version I
>   started with. The layout affects gcc code generation choices and this way
>   was fastest on x86 and alpha.
>   
>   Note that 'CPUTYPE=p3' etc makes a fair difference to this.  It is
>   around 45% faster with -march=pentiumpro on a p6 cpu.
>   
>   Revision  Changes    Path
>   1.14      +2 -2      src/sys/alpha/include/types.h
>   1.21      +2 -2      src/sys/i386/include/types.h
>   1.2       +2 -2      src/sys/ia64/include/types.h
>   1.2       +2 -1      src/sys/powerpc/include/types.h
>   1.53      +7 -14     src/sys/kern/vfs_cache.c
>   1.58      +1 -2      src/sys/nfs/nfs.h
>   1.44      +3 -29     src/sys/nfs/nfs_node.c
> 
> 

Cheers,
-Peter
--
Peter Wemm - peter@FreeBSD.org; peter@yahoo-inc.com; peter@netplex.com.au
"All of this is for nothing if we don't go to the stars" - JMS/B5


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