[OmniOS-discuss] Creating KVMs

Eric Sproul esproul at omniti.com
Thu Oct 4 12:34:16 EDT 2012


On Tue, Oct 2, 2012 at 5:23 PM, Bryan Horstmann-Allen
<bdha at mirrorshades.net> wrote:
> | You'll probably also want "set hires_tick=1" if you're not doing that already.
>
> Do you have a reference for that?

Theo talked about it on IRC a while back:
http://echelog.com/logs/browse/illumos/1332712800 (search for "hires")

The gist is that it affects the minimum sleep time available.  If a
program wants to "sleep 1ms" the least it can get with the default
tick rate is 10ms.  That leads to a non-trivial amount of busywait or
sleep time and less work getting done, especially for highly
concurrent apps like Reconnoiter and ATS.

Eric


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