RE: Virtex 4 Avnet Mini-Module Networking.

1 message, 1 author, 2007-06-22 · open the first message on its own page

RE: Virtex 4 Avnet Mini-Module Networking.

From: Mohammad Sadegh Sadri <hidden>
Date: 2007-06-22 21:21:34 

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=
.=20

I have not access to ML405, but examining implementation results for two de=
signs it is obvious that they are different. logic resource usage for xapp9=
41 is over 6000 slices but for the custome design it is near 5700 slices.=20

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 x=
app941 is much larger than our plb temac module.=20

I examined the MHS files for both designs carefully, they are really the sa=
me. Of course it seems that the mhs file for xapp941 is edited by hand or a=
t least is not created by the usual method we use. This is because signal n=
ames and module names are completely different from an automatic EDK9.1 gen=
erated design.=20

Finally why not ask the two authors of this app note about what they have d=
one in their desing? is it some kind of secret?=20

and have you ever tried using ngc file for plb temac of xapp941 in a custom=
e design? .... should not be really neccessary of course.



----------------------------------------
Date: Thu, 21 Jun 2007 22:18:52 +0400
From: <redacted>
To: <redacted>
CC: <redacted>
Subject: Re: Virtex 4 Avnet Mini-Module Networking.
=20
Mohammad Sadegh Sadri wrote:
quoted
=20
very interesting
=20
the provided xps project from xapp941 results 230Mbits but your custome=
 system is 83.0Mbits, yes?
=20
yes
=20
quoted
just, are you sure the ppc core has the same core clock frequency in bo=
th designs? I mean may be the xapp941 is running at 300MHz but yours at 100=
MHz.=20
=20
both run at 300MHz
=20
quoted
And what about a custom system with 9.1SP2? does that gives the same pe=
rformance?
=20
haven't tried this yet
=20
quoted
Finally If possible please release the test results for TCP streams. ( =
9.1 no SP and 9.1 SP2 )
=20
The TEMAC driver is from EDK 9.1.02 (IOW, SP2).
=20
bitstream made by myself with EDK 9.1.00:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=20
root@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 (1=
92.168.119.1) port 0 AF_INET : =B15.0% @ 99% conf.
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec
=20
  87380 217088  32768    30.00      41.66
=20
bitstream from XAPP941:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=20
root@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 (1=
92.168.119.1) port 0 AF_INET : =B15.0% @ 99% conf.
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec
=20
  87380 217088  32768    30.00     111.86
=20
And I didn't test ML405 receive performance.
=20
Thanks,
Andrei
=20
quoted
thanks
=20
=20
=20
----------------------------------------
quoted
Date: Thu, 21 Jun 2007 18:53:49 +0400
From: <redacted>
To: <redacted>
CC: <redacted>; <redacted>; glenn.g.hart=
@us.westinghouse.com
quoted
quoted
Subject: Re: Virtex 4 Avnet Mini-Module Networking.

Mohammad Sadegh Sadri wrote:
quoted
I'm wondering where are the original developers of TEMAC driver these=
 days, I have not seen any posts from any of andrei
quoted
quoted
quoted
nor grant in the recent weeks. may be they are involved in other proj=
ects.
quoted
quoted
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 S=
GDMA mode for this board made by Xilinx (XAPP941).
quoted
quoted
With the TEMAC driver from EDK 9.1SP2 and the XAPP941 bitstream I've g=
ot (no jumbo frames):
quoted
quoted
   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
quoted
quoted
   eth%d: XTemac: PHY detected at address 7.
   eth0: Xilinx TEMAC #0 at 0x80000000 mapped to 0xC5060000, irq=3D0
   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 =3D 16, Receive Threshold =3D 2
   eth0: XTemac: Send Wait bound =3D 1, Receive Wait bound =3D 1

   root@192.168.119.11:~/netperf-2.4.1/src# ./netperf -l 30 -H 192.168=
.119.1 -i 10,
quoted
quoted
   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
quoted
quoted
   9.1 (192.168.119.1) port 0 AF_INET : =B15.0% @ 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.
quoted
quoted
So that exact the same kernel etc could be used for the both bitstream=
s.
quoted
quoted
And with the self-made one I see exact the same output with the only d=
ifference:
quoted
quoted
   root@192.168.119.11:~/netperf-2.4.1/src# ./netperf -l 30 -H 192.168=
.119.1 -i 10,
quoted
quoted
   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
quoted
quoted
   9.1 (192.168.119.1) port 0 AF_INET : =B15.0% @ 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/sy=
stem.ucf
quoted
quoted
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 f=
or a while.
quoted
quoted

Thanks,
Andrei
=20
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quoted
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