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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 15:45:10 -0000
  • Cc: <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Fri, 25 Feb 2005 15:59:08 +0000
  • List-id: List for Xen developers <xen-devel.lists.sourceforge.net>
  • Thread-index: AcUaYMSzAq/ZG8HpQz+mKO2SEz7M7gA1BYCAAAYh7AA=
  • Thread-topic: [Xen-devel] Limiting Domains' Network Network Transmit Rate

>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?

Sorry I was being stupid.  I thought you meant the time stamping didn't
have good accuracy, re-reading your post I realise you meant the timer

What is the best way to get the current time for the credit scheduler?
It seems to me that previously netback used something like time
functions in the hypervisitors time.h/c.  Where were these functions
placed in the Linux kernel, and are they still there?  Is this the best
thing to use, or are there better ways of going about it now?  Please
excuse me if these are daft, I'm new to Kernel hacking and Xen.



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