Date: Tue, 17 Jul 2007 22:36:56 +0000 (UTC) From: Jeff Roberson <jeff@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/amd64/amd64 cpu_switch.S Message-ID: <200707172236.l6HMauO8085675@repoman.freebsd.org>
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jeff 2007-07-17 22:36:56 UTC
FreeBSD src repository
Modified files:
sys/amd64/amd64 cpu_switch.S
Log:
- Optimize the amd64 cpu_switch() TD_LOCK blocking and releasing to
require fewer blocking loops.
- Don't use atomic ops with 4BSD or on UP.
- Only use the blocking loop if ULE is compiled in.
- Use the correct memory barrier.
Discussed with: attilio, jhb, ssouhlal
Tested by: current@
Approved by: re
Revision Changes Path
1.159 +19 -15 src/sys/amd64/amd64/cpu_switch.S
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