Date: Sat, 13 Dec 1997 18:11:28 -0800 (PST) From: John Dyson <dyson@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG Subject: cvs commit: src/sys/kern init_main.c src/sys/vm pmap.h src/sys/i386/i386 machdep.c pmap.c support.s swtch.s src/sys/i386/include cpufunc.h Message-ID: <199712140211.SAA25878@freefall.freebsd.org>
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dyson 1997/12/13 18:11:28 PST
Modified files:
sys/kern init_main.c
sys/vm pmap.h
sys/i386/i386 machdep.c pmap.c support.s swtch.s
sys/i386/include cpufunc.h
Log:
After one of my analysis passes to evaluate methods for SMP TLB mgmt, I
noticed some major enhancements available for UP situations. The number
of UP TLB flushes is decreased much more than significantly with these
changes. Since a TLB flush appears to cost minimally approx 80 cycles,
this is a "nice" enhancement, equiv to eliminating between 40 and 160
instructions per TLB flush.
Changes include making sure that kernel threads all use the same PTD,
and eliminate unneeded PTD switches at context switch time.
Revision Changes Path
1.79 +2 -2 src/sys/kern/init_main.c
1.25 +2 -1 src/sys/vm/pmap.h
1.279 +9 -1 src/sys/i386/i386/machdep.c
1.174 +26 -1 src/sys/i386/i386/pmap.c
1.58 +4 -1 src/sys/i386/i386/support.s
1.65 +47 -10 src/sys/i386/i386/swtch.s
1.73 +7 -1 src/sys/i386/include/cpufunc.h
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