Re: [P2PSIP] How to describe the processing power

"Das, Saumitra" <saumitra@xxxxxxxxxxxx> · Wed, 12 Nov 2008 01:12:09 -0800

Dear Song,

   Processing power would be more informational
in terms of CPU load. A good example of what would be useful would be to look
at the comon monitoring tool (http://summer.cs.princeton.edu/status/) for the
planetlab testbed. It uses the following metrics for selecting nodes based on CPU
and I have found such selection to be very useful in determining the
performance of a slice on the machine.

From the comon site, these are some metrics that may be
useful

“CPU Speed

Busy CPU

Sys CPU

Free CPU

These fields give some insight into the CPU behavior of the node. The CPU Speed
is just the speed of the processor in gigahertz. The Busy CPU field gives the %
of time the CPU is utilized, and the Sys CPU field specifies what percentage of
time the CPU is spending in the OS. Both of these values are the maximum values
over the past 5 minutes. The Free CPU indicates how much of the CPU a spin-loop
was able to obtain, giving some insight into how much of the node's CPU a new
slice would receive.”

We could define these fields and leave it optional as to
whether all of them are required. i.e. running a spin-loop may be expensive for
some devices.

Best,

Saumitra

www.saumitra.info

Date: Tue, 11 Nov 2008 15:12:21 +0800

From: Song Haibin <melodysong@xxxxxxxxxx>

Subject: [P2PSIP] How to describe the processing power

To: p2psip@xxxxxxxx

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Dear all,

In p2psip diagnostics draft

http://tools.ietf.org/id/draft-zheng-p2psip-diagnose-03.txt

, we have some doubt about how to describe one of the
diagnostic

information: processing power. We propose to use the unit
of MIPS to describe it. However, the Max number of connections may be another
choice.

Do you have any good suggestions?

Best Regards,

Song Haibin

Email: melodysong@xxxxxxxxxx

Skype: alexsonghw

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