March 2004 - ixp1200 - lists.cs.princeton.edu

Doubt reg. Floating Point Operations support in IXP1200
by sharmila radhakrishnan 09 Mar '04

09 Mar '04

Hello All, I have a doubt.IXP1200 doesnot support floating point operations.Is their any way in which computations involving floating point operations can be done.I would be very much thankful if you'll could help me out with this.Thanx in advance. Regards, Sharmila Yahoo! India Insurance Special: Be informed on the best policies, services, tools and more.

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Time Is Running Out. IXA University Program IXP425 Student Design Competition
by Schuetze, Joel D 08 Mar '04

08 Mar '04

Greetings, Just a quick note to remind you that time is running out to get your entries submitted for the IXA University Program IXP425 Student Design Competition. Entries must be received by March 26th. The Intel IXA University Program Student Design competition will allow undergraduate and graduate university students from U.S. Universities to present innovative work based on the Intel(r) IXA architecture, specifically the IXP425 network processor. We have a web-based application process available through the IXAEDU.com website and all entries will be reviewed by an Intel panel of experts. The best qualified selected entries will be awarded grants and IXP425 development kits for the proposed projects. After the selected projects have been completed and submitted for judging, the top two (2) projects will be selected to receive an award presented at the Fall 2004 Intel Developer Forum (IDF). Please note that this competition is available for students enrolled at US Universities only. For complete information please visit http://ixaedu.com/news/DesignCompetition. IXA University Program Intel Corporation

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Reg TRIES
by dveluchamy＠vsnl.net 06 Mar '04

06 Mar '04

Hi all, Does Intel provide any library for working with tries? I find there is a mention of TRIE5 & TRIE8, but couldn't anything more in the docs. Thanx in advance. D.Veluchamy

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RE: [ixp1200] IXP1200 or IXF440 maximum MTU
by Botham, Mick 04 Mar '04

04 Mar '04

Tim, The IXF440 will process packets upto the size programmed into the 'Maximium Packet Size' register, although this accepts values upto 15 bits, you should limit this to Jumbo packet length. Rgds Mick -----Original Message----- From: ixp1200-bounces(a)lists.cs.princeton.edu [mailto:ixp1200-bounces@lists.cs.princeton.edu] On Behalf Of Tim Stevens Sent: 04 March 2004 15:27 To: ixp1200(a)lists.cs.princeton.edu Subject: [ixp1200] IXP1200 or IXF440 maximum MTU Hi, Can anyone tell me whether the IXP1200 boards (ours=ENP-2505) are capable of processing ethernet frames larger than 1500 bytes? Or is the IXF440 the limiting factor? I'm asking this because it might be practical to implement VLAN tagging 802.1Q (this adds 4 bytes to an ethernet frame) or other layer 2 features. Thanks. Kind regards, Tim _______________________________________________ ixp1200 mailing list ixp1200(a)lists.cs.princeton.edu https://lists.cs.princeton.edu/mailman/listinfo/ixp1200

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IXP1200 or IXF440 maximum MTU
by Tim Stevens 04 Mar '04

04 Mar '04

Hi, Can anyone tell me whether the IXP1200 boards (ours=ENP-2505) are capable of processing ethernet frames larger than 1500 bytes? Or is the IXF440 the limiting factor? I'm asking this because it might be practical to implement VLAN tagging 802.1Q (this adds 4 bytes to an ethernet frame) or other layer 2 features. Thanks. Kind regards, Tim

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Execution Time Measurement in IXP1200 via gettimeofday
by Jo Ueyama 03 Mar '04

03 Mar '04

Hi All, I am trying to measure the execution time (via C/C++ gettimeofday) of applications running on the StrongARM but I am not being able to measure it properly. Basically, in 10/20% of the executions, gettimeofday is outputing time (in miliseconds) that is out of order (i.e. sometimes it outputs time lower than the previous one resulting in a negative time difference). Let me mention that the same code runs nicely on the PC. Has anyone ever come across such situation? How do you all normally measure execution time in the IXP1200 board? Thanks a lot in anticipation. Regards, -Jo'

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RE: [ixp1200] Receiving Data from a particular port on IXP2400
by David Mentre 01 Mar '04

01 Mar '04

Hello Sanjay, > From: Sanjay Kumar [mailto:ksanjay@cc.gatech.edu] > Sent: Friday, February 27, 2004 11:27 PM > I am writing a microengine rx/tx driver for ixp2400. for the > receive side, > i want to allocate a particular thread for particular MAC > port. > All I could find out was that MSF's receive status word (RSW) > contains a > field which tells which physical port this mpacket came from (e.g. in > POS-PHY Level 3, 32 bit MPHY mode, the 5 LSB bits of RSW0 > will tell this > information). and then it is the thread's job to read this > field and sort > out different mpackets received from different ports. This > will make the > driver pretty messy especially if you are employing multiple > threads to > receive mpackets from a particular port. >From my own reading of Intel docs, you can't wait on a given logical port, only for a physical port, for example in SPHY-4 mode. Why not reuse Intel design, i.e. one full micro-engine (8 threads) that receives from all ports? You could modify this block to output assembled network packets to different scratch ring if you want to have port differentiation. In my opinion (but I may be wrong), Intel engineers have optimized receive block for performance and it would be hard to do a better job. Sincerely yours, david -- David Mentré <mentre(a)tcl.ite.mee.com> - Research engineer (Ph.D.) Mitsubishi Electric ITE-TCL / European Telecommunication Research Lab Phone: +33 2 23 45 58 29 / Fax: +33 2 23 45 58 59 http://www.mitsubishi-electric-itce.fr

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