[Xen-users] doubt regarding xen network IO scheduler

To:	xen-users@xxxxxxxxxxxxxxxxxxx
Subject:	[Xen-users] doubt regarding xen network IO scheduler
From:	Kuriakose Mathew <kuriakose83@xxxxxxxxx>
Date:	Wed, 21 Oct 2009 16:05:21 +0530
Delivery-date:	Wed, 21 Oct 2009 03:36:08 -0700
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Hi,
With reference to the netback and netfront model of device driver in Xen(xen 3.1.3 and linux 2.6.18.8), I am confused as to where network IO scheduler fits in. I have read that there are different types of IO schedulers in linux - deadline ,anticipatory, complete fair queueing (cfq )etc. where cfq is the default. Is it only being used in the context of disk IO? or the same thing is used for network IO?

Also, in netback code , I saw some credit scheduling of the network interfaces corresponding to guest domains. So does that mean whenever Dom 0 is scheduled ,it does a credit scheduling of the network interfaces corresponding to different DomUs. In this context where does the IO scheduler fits in?

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[Xen-users] doubt regarding xen network IO scheduler