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From: Robert Watson <rwatson@FreeBSD.org>
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To: John Baldwin <jhb@freebsd.org>
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Subject: Re: svn commit: r191291 - in head: lib/libthr/thread
 libexec/rtld-elf/amd64
 libexec/rtld-elf/arm libexec/rtld-elf/i386 libexec/rtld-elf/ia64
 libexec/rtld-elf/mips libexec/rtld-elf/powerpc libexec/rtld-...
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On Mon, 20 Apr 2009, John Baldwin wrote:

>>   Now that the kernel defines CACHE_LINE_SIZE in machine/param.h, use
>>   that definition in the custom locking code for the run-time linker
>>   rather than local definitions.
>
> Perhaps CACHE_LINE_SIZE for ia64 and sparc64 should be 128 since that is 
> what rtld used?

I'm happy with whatever size the platform maintainers would like.  I've 
changed ia64, sparc64, and sun4v kernel CACHE_LINE_SIZE definitions to 128, 
and powerpc was already 128, but left the others at 64 bytes until such time 
as we have some useful numbers or informat ionto suggest another choice would 
be better.  All I'm really looking for here is a baseline constant to use, I 
have no particular vested interest in specific values for the constants.

Robert N M Watson
Computer Laboratory
University of Cambridge