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mirror of https://git.FreeBSD.org/src.git synced 2024-12-17 10:26:15 +00:00
freebsd/sys/powerpc
Peter Wemm 6eb39ac8fc 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.
2001-03-17 09:31:06 +00:00
..
aim remove bogus check -- for kernel threads we fork off of proc0, not curproc 2001-03-15 02:32:26 +00:00
include Use a generic implementation of the Fowler/Noll/Vo hash (FNV hash). 2001-03-17 09:31:06 +00:00
powerpc remove bogus check -- for kernel threads we fork off of proc0, not curproc 2001-03-15 02:32:26 +00:00