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From: Poul-Henning Kamp <phk@FreeBSD.ORG>
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Date: Sun, 29 Nov 1998 12:31:03 -0800 (PST)
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To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject: cvs commit: src/sys/kern kern_clock.c
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phk         1998/11/29 12:31:03 PST

  Modified files:
    sys/kern             kern_clock.c 
  Log:
  Make the previous behaviour the default, add a sysctl which you
  can set if your hw/sw produces the "calcru negative..." message.
  
  Setting the alternate method (sysctl -w kern.timecounter.method=1)
  makes the the get{nano|micro}*() functions call the real thing at
  resulting in a measurable but minor overhead.
  
  I decided to NOT have the "calcru" change the method automatically
  because you should be aware of this problem if you have it.
  
  The problems currently seen, related to usleep and a few other corners
  are fixed for both methods.
  
  Revision  Changes    Path
  1.86      +42 -12    src/sys/kern/kern_clock.c

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