Virtex 4 Avnet Mini-Module Networking.
Mohammad Sadegh Sadri
mamsadegh at hotmail.com
Sat Jun 23 07:21:33 EST 2007
Andrei,
well you are correct, using EDK9.1SP2 I created a custome design for ML405 and implemented it. My design was exactly the same as what xapp941 presents.
I have not access to ML405, but examining implementation results for two designs it is obvious that they are different. logic resource usage for xapp941 is over 6000 slices but for the custome design it is near 5700 slices.
In addition the fan out value for PLB TEMAC clock is near 5000 for xapp941 and near 3000 for our custome design. this means that plb temac module in xapp941 is much larger than our plb temac module.
I examined the MHS files for both designs carefully, they are really the same. Of course it seems that the mhs file for xapp941 is edited by hand or at least is not created by the usual method we use. This is because signal names and module names are completely different from an automatic EDK9.1 generated design.
Finally why not ask the two authors of this app note about what they have done in their desing? is it some kind of secret?
and have you ever tried using ngc file for plb temac of xapp941 in a custome design? .... should not be really neccessary of course.
----------------------------------------
> Date: Thu, 21 Jun 2007 22:18:52 +0400
> From: akonovalov at ru.mvista.com
> To: mamsadegh at hotmail.com
> CC: linuxppc-embedded at ozlabs.org
> Subject: Re: Virtex 4 Avnet Mini-Module Networking.
>
> Mohammad Sadegh Sadri wrote:
> >
> > very interesting
> >
> > the provided xps project from xapp941 results 230Mbits but your custome system is 83.0Mbits, yes?
>
> yes
>
> > just, are you sure the ppc core has the same core clock frequency in both designs? I mean may be the xapp941 is running at 300MHz but yours at 100MHz.
>
> both run at 300MHz
>
> > And what about a custom system with 9.1SP2? does that gives the same performance?
>
> haven't tried this yet
>
> > Finally If possible please release the test results for TCP streams. ( 9.1 no SP and 9.1 SP2 )
>
> The TEMAC driver is from EDK 9.1.02 (IOW, SP2).
>
> bitstream made by myself with EDK 9.1.00:
> =========================================
>
> root at 192.168.119.11:~/netperf-2.4.1/src# ./netperf -l 30 -H 192.168.119.1 -i 10, 2 -I 99,10 -t TCP_STREAM -- -m 32768 -s 262144
> TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.119.1 (192.168.119.1) port 0 AF_INET : ±5.0% @ 99% conf.
> Recv Send Send
> Socket Socket Message Elapsed
> Size Size Size Time Throughput
> bytes bytes bytes secs. 10^6bits/sec
>
> 87380 217088 32768 30.00 41.66
>
> bitstream from XAPP941:
> =======================
>
> root at 192.168.119.11:~/netperf-2.4.1/src# ./netperf -l 30 -H 192.168.119.1 -i 10, 2 -I 99,10 -t TCP_STREAM -- -m 32768 -s 262144
> TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.119.1 (192.168.119.1) port 0 AF_INET : ±5.0% @ 99% conf.
> Recv Send Send
> Socket Socket Message Elapsed
> Size Size Size Time Throughput
> bytes bytes bytes secs. 10^6bits/sec
>
> 87380 217088 32768 30.00 111.86
>
> And I didn't test ML405 receive performance.
>
> Thanks,
> Andrei
>
> > thanks
> >
> >
> >
> > ----------------------------------------
> >> Date: Thu, 21 Jun 2007 18:53:49 +0400
> >> From: akonovalov at ru.mvista.com
> >> To: mamsadegh at hotmail.com
> >> CC: linuxppc-embedded at ozlabs.org; kashiwagi at co-nss.co.jp; glenn.g.hart at us.westinghouse.com
> >> Subject: Re: Virtex 4 Avnet Mini-Module Networking.
> >>
> >> Mohammad Sadegh Sadri wrote:
> >>> I'm wondering where are the original developers of TEMAC driver these days, I have not seen any posts from any of andrei
> >>> nor grant in the recent weeks. may be they are involved in other projects.
> >> As for me - no, not until the end of this week..
> >>
> >> I am puzzled with the following:
> >>
> >> I've got ML405 recently. There is a prebuilt bitstream with TEMAC in SGDMA mode for this board made by Xilinx (XAPP941).
> >> With the TEMAC driver from EDK 9.1SP2 and the XAPP941 bitstream I've got (no jumbo frames):
> >>
> >> XTemac: using sgDMA mode.
> >> XTemac: using TxDRE mode
> >> XTemac: using RxDRE mode
> >> XTemac: buffer descriptor size: 32768 (0x8000)
> >> XTemac: (buffer_descriptor_init) phy: 0x3cf8000, virt: 0xff100000, size: 0x8000
> >> eth%d: XTemac: PHY detected at address 7.
> >> eth0: Xilinx TEMAC #0 at 0x80000000 mapped to 0xC5060000, irq=0
> >> eth0: XTemac id 1.0f, block id 5, type 8
> >>
> >> eth0: XTemac: Options: 0xb8f2
> >> eth0: XTemac: We renegotiated the speed to: 1000
> >> eth0: XTemac: speed set to 1000Mb/s
> >> eth0: XTemac: Send Threshold = 16, Receive Threshold = 2
> >> eth0: XTemac: Send Wait bound = 1, Receive Wait bound = 1
> >>
> >> root at 192.168.119.11:~/netperf-2.4.1/src# ./netperf -l 30 -H 192.168.119.1 -i 10,
> >> 2 -I 99,10 -t UDP_STREAM -- -m 32768 -s 262144
> >> UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.11
> >> 9.1 (192.168.119.1) port 0 AF_INET : ±5.0% @ 99% conf.
> >> Socket Message Elapsed Messages
> >> Size Size Time Okay Errors Throughput
> >> bytes bytes secs # # 10^6bits/sec
> >>
> >> 217088 32768 30.00 26391 0 230.60
> >> 107520 30.00 26377 230.48
> >>
> >> Not that bad for this setup.
> >>
> >> With xps (EDK 9.1 without any SPs) I've tried creating exact the same design.
> >> So that exact the same kernel etc could be used for the both bitstreams.
> >> And with the self-made one I see exact the same output with the only difference:
> >>
> >> root at 192.168.119.11:~/netperf-2.4.1/src# ./netperf -l 30 -H 192.168.119.1 -i 10,
> >> 2 -I 99,10 -t UDP_STREAM -- -m 32768 -s 262144
> >> UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.11
> >> 9.1 (192.168.119.1) port 0 AF_INET : ±5.0% @ 99% conf.
> >> Socket Message Elapsed Messages
> >> Size Size Time Okay Errors Throughput
> >> bytes bytes secs # # 10^6bits/sec
> >>
> >> 217088 32768 30.00 9593 0 83.82
> >> 107520 30.00 9586 83.76
> >>
> >> :o(
> >>
> >> Rebuilding the XAPP941 project with EDK 9.1.00 still leaves 230Mb/sec.
> >> I also pulled the additional timing constraints from XAPP941's data/system.ucf
> >> into the self-made data/system.ucf, but this haven't change anything.
> >>
> >> I've run out of ideas, and switched from TEMAC to other Xilinx stuff for a while.
> >>
> >>
> >> Thanks,
> >> Andrei
> >
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