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From: Alexander Motin <mav@FreeBSD.org>
Date: Sat, 11 Sep 2010 07:08:22 +0000 (UTC)
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Subject: cvs commit: src/sys/kern sched_4bsd.c
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mav         2010-09-11 07:08:22 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             sched_4bsd.c 
  Log:
  SVN rev 212455 on 2010-09-11 07:08:22Z by mav
  
  Merge some SCHED_ULE features to SCHED_4BSD:
  - Teach SCHED_4BSD to inform cpu_idle() about high sleep/wakeup rate to
  choose optimized handler. In case of x86 it is MONITOR/MWAIT. Also it
  will be needed to bypass forthcoming idle tick skipping logic to not
  consume resources on events rescheduling when it won't give any benefits.
  - Teach SCHED_4BSD to wake up idle CPUs without using IPI. In case of x86,
  when MONITOR/MWAIT is active, it require just single memory write. This
  doubles performance on some heavily switching test loads.
  
  Revision  Changes    Path
  1.141     +28 -4     src/sys/kern/sched_4bsd.c