Date: Thu, 20 Nov 2003 14:54:45 -0800 (PST) From: Peter Wemm <peter@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/amd64/amd64 machdep.c src/sys/amd64/include pcpu.h Message-ID: <200311202254.hAKMsj2Y009764@repoman.freebsd.org>
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peter 2003/11/20 14:54:45 PST
FreeBSD src repository
Modified files:
sys/amd64/amd64 machdep.c
sys/amd64/include pcpu.h
Log:
Provide a streamlined '#define curthread __curthread()' for amd64 to avoid
the compiler having to parse and optimize the PCPU_GET(curthread) so often.
__curthread() is an inline optimized version of PCPU_GET(curthread) that
knows that pc_curthread is at offset zero in the pcpu struct. Add a
CTASSERT() to catch any possible changes to this. This accounts for
just over a 1% wall clock speedup for total kernel compile/link time,
and 20% compile time speedup on some specific files depending on which
compile options are used.
Approved by: re (jhb)
Revision Changes Path
1.600 +3 -0 src/sys/amd64/amd64/machdep.c
1.41 +10 -0 src/sys/amd64/include/pcpu.h
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