Re: [ixp1200] IXP1200 timings.

23 May 2003

      The FBI units cycle counter can be read from the microengines using the csr 
instruction.. I have used the instruction.

The paper mentions "instrumenting the code to use the IXP1200 cycle counter"
Is that what you mean by that, or are you doing anything else?

--
Shyamal Pandya

Arizona State University

Addr:
920 S Terrace Rd #102
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...
From: "Yitzchak M. Gottlieb" 
Reply-To: ixp1200@CS.Princeton.EDU
To: "'ixp1200@CS.Princeton.EDU'" 
Subject: Re: [ixp1200] IXP1200 timings.
Date: Fri, 23 May 2003 10:19:36 -0400 (EDT)
On Fri, 23 May 2003, Liam.Noonan wrote:
...
I am trying to obtain information regarding the number of cycles/ length 
of
time it takes the IXP1200 to peform the following tasks.
1, move an mpacket from the a port to rfifo
2, moving mpackets from rfifo to the Microengines, SDRAM
3. Moving mpackets from SDRAM and the Microengine to TFIFO
4. Moving mpackets from TFIFO to an out going port.
5. access times for accessing SRAM.
There is a Princeton University technical report,
http://www.cs.princeton.edu/nsg/papers/ixp.html, and an SOSP paper
http://www.cs.princeton.edu/nsg/papers/ixp-sosp.html by Tammo Spalink that
addresses at least some of these questions.
Zuki
--
Yitzchak Gottlieb
zuki@CS.Princeton.EDU
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