cvs commit: src/sys/kern kern_cpu.c

[Nate Lawson]

njl         2005-08-30 04:45:32 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             kern_cpu.c 
  Log:
  Eliminate cpufreq levels for two cases that are less than optimal:
  
  1. Walk the absolute list in reverse to prefer duplicated levels that have
  a lower absolute setting, i.e. 800 Mhz/50% is better than 1600 Mhz/25% even
  though both have the same actual frequency.  This also removes the need to
  check for already-modified levels since by definition, those will be added
  later in the sorted list.
  
  2. Compare the absolute settings for derived levels and don't use the new
  level if it's higher.  For example, a level of 800 Mhz/75% is preferable to
  1600 Mhz/25% even though the latter has a lower total frequency.
  
  This work is based on a patch from the submitter but reworked by myself.
  
  Submitted by:   Tijl Coosemans (tijl/ulyssis.org)
  
  Revision  Changes    Path
  1.20      +48 -47    src/sys/kern/kern_cpu.c