git: DragonFly_RELEASE_3_2 kernel - Reduce the size of the callout wheel

Matthew Dillon dillon at
Thu Dec 13 19:17:34 PST 2012

commit 4e9492a2de2db3eb2c3ba2c331d664c7f9829132
Author: Matthew Dillon <dillon at>
Date:   Mon Dec 10 15:11:46 2012 -0800

    kernel - Reduce the size of the callout wheel
    * The callout wheel is per-cpu but ncallout is calculated based on memory.
      A system with many cpus tended to allocate an excessive amount of memory
      in aggregate for the callout wheels.
    * Reduce the size of the per-cpu callout wheel by approximately a factor
      of (ncpus).  On a 16G machine with 8 cores, aggregate callout wheel
      allocations is reduced from 128MB to 16MB.

Summary of changes:
 sys/kern/kern_timeout.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

DragonFly BSD source repository

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