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Re: [Vserver] Re: Container Test Campaign [message #4346 is a reply to message #4343] Thu, 06 July 2006 11:00 Go to previous message
dev is currently offline  dev
Messages: 1693
Registered: September 2005
Location: Moscow
Senior Member
>>ok, we will, with and without. It will add one bar to the graph.
>
>
> I'd suggest to test _all_ available schedulers if possible,
> for example Linux-VServer decided to favor the cfq scheduler
> for 'fair' I/O scheduling per context, and OVZ did similar
> (IIRC)

For OpenVZ the reason is not CFQ fair scheduling only
(which is not that fair actually in our tests done inhouse),
but more in the fact that anticipatory scheduler has some bad issues
with sync. on some real life workloads (e.g. with SMTP agents)
anticipatory fails to work with reasonable performance.
http://bugzilla.kernel.org/show_bug.cgi?id=5900

Thanks,
Kirill

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