MAEDA Naoaki wrote:
Peter Williams wrote:
I've done some informal testing with smaller values of CAP_STATS_OFFSET
and there is only a minor improvement.
However, something that does improve behaviour for short lived tasks is
to increase the value of HZ. This is because the basic unit of CPU
allocation by the scheduler is 1/HZ and this is also the minimum time
(and granularity) with which sinbinning and other capping measures can
be implemented. This is the fundamental limiting factor for the
accuracy of capping i.e. if everything worked perfectly the best
granularity that can be expected from capping of short lived tasks is
1000 / (HZ * duration) where duration is in seconds.
I already defines CONFIG_HZ=1000. Do you suggest increasing more?
No.
Peter
--
Dr Peter Williams, Chief Scientist <[email protected]>
Aurema Pty Limited
Level 2, 130 Elizabeth St, Sydney, NSW 2000, Australia
Tel:+61 2 9698 2322 Fax:+61 2 9699 9174 http://www.aurema.com
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