Date: Thu, 11 Nov 2004 22:42:25 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/i386/include atomic.h Message-ID: <200411112242.iABMgPMg047573@repoman.freebsd.org>
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jhb 2004-11-11 22:42:25 UTC
FreeBSD src repository
Modified files:
sys/i386/include atomic.h
Log:
- Place the gcc memory barrier hint in the right place in the 80386 version
of atomic_store_rel().
- Use the 80386 versions of atomic_load_acq() and atomic_store_rel() that
do not use serializing instructions on all UP kernels since a UP machine
does need to synchronize with other CPUs. This trims lots of cycles from
spin locks on UP kernels among other things.
Benchmarked by: rwatson
Revision Changes Path
1.33 +9 -8 src/sys/i386/include/atomic.h
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