Date: Tue, 30 Sep 2003 01:11:36 -0700 (PDT) From: Jeff Roberson <jeff@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern kern_synch.c src/sys/sys proc.h src/sys/i386/i386 genassym.c pmap.c swtch.s src/sys/i386/include pcb.h Message-ID: <200309300811.h8U8BaAQ061807@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
jeff 2003/09/30 01:11:36 PDT
FreeBSD src repository
Modified files:
sys/kern kern_synch.c
sys/sys proc.h
sys/i386/i386 genassym.c pmap.c swtch.s
sys/i386/include pcb.h
Log:
- On my Pentium4-M laptop, invalpg takes ~1100 cycles if the page is found in
the TLB and ~1600 if it is not. Therefore, it is more effecient to
invalidate the TLB after operations that use CMAP rather than before.
- So that the tlb is invalidated prior to switching off of a processor, we
must change the switchin functions to switchout functions.
- Remove td_switchout from the thread and move it to the x86 pcb.
- Move the code that calls switchout into swtch.s. These changes make this
optimization truely x86 specific.
Revision Changes Path
1.143 +1 -1 src/sys/i386/i386/genassym.c
1.438 +33 -33 src/sys/i386/i386/pmap.c
1.143 +6 -1 src/sys/i386/i386/swtch.s
1.50 +2 -1 src/sys/i386/include/pcb.h
1.234 +0 -8 src/sys/kern/kern_synch.c
1.348 +0 -1 src/sys/sys/proc.h
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200309300811.h8U8BaAQ061807>