Date: Mon, 26 Mar 2007 18:03:30 +0000 (UTC) From: Nate Lawson <njl@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/sys cpu.h eventhandler.h src/sys/kern kern_cpu.c src/sys/i386/i386 identcpu.c tsc.c src/sys/i386/isa prof_machdep.c src/sys/amd64/amd64 identcpu.c prof_machdep.c tsc.c src/sys/contrib/altq/altq altq_subr.c Message-ID: <200703261803.l2QI3Ui8013507@repoman.freebsd.org>
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njl 2007-03-26 18:03:30 UTC
FreeBSD src repository
Modified files:
sys/sys eventhandler.h cpu.h
sys/kern kern_cpu.c
sys/i386/i386 tsc.c identcpu.c
sys/i386/isa prof_machdep.c
sys/amd64/amd64 tsc.c identcpu.c prof_machdep.c
sys/contrib/altq/altq altq_subr.c
Log:
Add an interface for drivers to be notified of changes to CPU frequency.
cpufreq_pre_change is called before the change, giving each driver a chance
to revoke the change. cpufreq_post_change provides the results of the
change (success or failure). cpufreq_levels_changed gives the unit number
of the cpufreq device whose number of available levels has changed. Hook
in all the drivers I could find that needed it.
* TSC: update TSC frequency value. When the available levels change, take the
highest possible level and notify the timecounter set_cputicker() of that
freq. This gets rid of the "calcru: runtime went backwards" messages.
* identcpu: updates the sysctl hw.clockrate value
* Profiling: if profiling is active when the clock changes, let the user
know the results may be inaccurate.
Reviewed by: bde, phk
MFC after: 1 month
Revision Changes Path
1.153 +17 -0 src/sys/amd64/amd64/identcpu.c
1.29 +38 -2 src/sys/amd64/amd64/prof_machdep.c
1.207 +94 -3 src/sys/amd64/amd64/tsc.c
1.9 +19 -0 src/sys/contrib/altq/altq/altq_subr.c
1.175 +17 -0 src/sys/i386/i386/identcpu.c
1.207 +94 -3 src/sys/i386/i386/tsc.c
1.30 +43 -13 src/sys/i386/isa/prof_machdep.c
1.24 +40 -26 src/sys/kern/kern_cpu.c
1.4 +33 -1 src/sys/sys/cpu.h
1.36 +11 -0 src/sys/sys/eventhandler.h
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