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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: Fri, 25 Feb 2005 12:28:20 -0000
  • Cc: <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Fri, 25 Feb 2005 15:54:35 +0000
  • List-id: List for Xen developers <xen-devel.lists.sourceforge.net>
  • Thread-index: AcUaYMSzAq/ZG8HpQz+mKO2SEz7M7gA1BYCA
  • Thread-topic: [Xen-devel] Limiting Domains' Network Network Transmit Rate

>Imprecision of the Linux jiffy-based timer. In fact this probably 
>doesn't matter.
>Fairly coarse-grained shaping in which we specify credit periods of 
>100s of
>milliseconds would be adequate for most people's needs.

Is do_gettimeofday fast enough performance wise for the credit based
shaping, after all, it's only called when the interface runs out of
credit. Correct me if I'm wrong, but do_gettimeofday has a higher
accuracy than the jiffy based timer?



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