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RE: [Xen-devel] Limiting Domains' Network Network Transmit Rate

  • To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
  • From: "Ross C Mcilroy" <mcilrorc@xxxxxxxxxxxxx>
  • Date: Thu, 24 Feb 2005 09:59:59 -0000
  • Cc: <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Thu, 24 Feb 2005 10:01:40 +0000
  • List-id: List for Xen developers <xen-devel.lists.sourceforge.net>
  • Thread-index: AcUZ1912CEFq0MV0S1u+QiXPCrtbFAAfveuA
  • Thread-topic: [Xen-devel] Limiting Domains' Network Network Transmit Rate

>> I was wondering if it is possible to limit the rate of packet
>> transmission for individual domains.  The "Safe Hardware Access..."
>> paper mention's a credit based scheduler for network transmission, 
>> which
>> would seem to be perfect for what I need, however in the Xen netback
>> driver source code, the credit code seems to be taken out by the
>> pre-processor (with a "#if 0").
>> Would this credit code work if I put it back in, and if so, how can
>> credit for each vif be set?  If this would not work is there any
>> way of limiting the network transmission of individual domains?
>Yes, we should add that back in at some point. An alternative is to use

>the existing 'tc' functionality in Linux for network traffic shaping 
>and policing.
>  -- Keir

How difficult would it be to put it back in?  If it was not a big job I
wouldn't mind trying to get it working myself.  Why was it taken out in
the first place?



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