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

[Nate Lawson]

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