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RE: [microblaze-uclinux] MicroBlaze MMU support test release now available
Bob, John,
Were these tests done with the ll_temac in fifo or SGDMA mode?
Thanx,
-Troy
Embedded Processor Spclst
Avnet EM - Western U.S. & Canada
-----Original Message-----
From: owner-microblaze-uclinux@xxxxxxxxxxxxxx
[mailto:owner-microblaze-uclinux@xxxxxxxxxxxxxx] On Behalf Of Bob Cutler
Sent: Friday, March 21, 2008 4:43 PM
To: microblaze-uclinux@xxxxxxxxxxxxxx
Subject: Re: [microblaze-uclinux] MicroBlaze MMU support test release now
available
Hi John,
Here is an update on petalinux-mmu-v0.10 network testing. I noticed that
there were quite a few kernel debug options enabled in petalinux-mmu-v0.10.
I disabled all of them and that brought the transfer rates in line with
BlueCat. I can still not get PC -> microblaze UDP transfers to work. They
no longer hang or panic petalinux though. Any idea what may be wrong with
UDP? I also attempted to test with the non-MMU petalinux-v0.30-rc1. The
nuttcp tool does not work very well on uClinux due to it's extensive use of
fork(). Here is an update of what I sent earlier:
I did some further network testing of petalinux-mmu-v0.10. I used the
nuttcp network testing tool to test unidirectional TCP and UDP traffic.
For all tests, I ran the server on the MicroBlaze with the "nuttcp -S"
command. For the tests over Ethernet, I ran the client on a PC with a
100BASE-T NIC connected directly to the MicroBlaze board with a crossover
cable. For the loopback device test, I ran the client on the MicroBlaze. I
used the Xilinx Spartan-3A DSP S3D1800A board running Xilinx's MicroBlaze
reference design for this board with the CPU clock at 62.5 MHz. Here are
the tests I ran using the same FPGA bitstream for two OS's:
Test petalinux-mmu-v0.10 BlueCat 2.4.2 Ratio
------------------------- ------------------- ------------- -----
TCP/IP : PC <- microblaze 7.2298 Mbps 7.7408 Mbps 1.071
TCP/IP : PC -> microblaze 3.7588 Mbps 3.7754 Mbps 1.004
UDP/IP : PC <- microblaze 3.7475 Mbps 3.9464 Mbps 1.053
UDP/IP : PC -> microblaze 0.0000 Mbps 4.9938 Mbps -----
TCP/IP : loopback device 14.7774 Mbps 15.3766 Mbps 1.041
UDP/IP : loopback device 11.3837 Mbps 11.6176 Mbps 1.021
The client commands I used on the PC for the first four tests are:
Test Command
------------------------- -------------------------------------
TCP/IP : PC <- microblaze nuttcp -r -T60 10.25.1.201
TCP/IP : PC -> microblaze nuttcp -t -T60 10.25.1.201
UDP/IP : PC <- microblaze nuttcp -r -u -T60 -Ri100m 10.25.1.201
UDP/IP : PC -> microblaze nuttcp -t -u -T60 -Ri5000 10.25.1.201
The client commands I used on the MicroBlaze for the last two tests are:
Test Command
------------------------- ---------------------------------
TCP/IP : loopback device nuttcp -T60 127.0.0.1
UDP/IP : loopback device nuttcp -u -T60 -Ri1000m 127.0.0.1
There is no transfer time for "UDP/IP : PC -> microblaze" on PetaLinux since
I can not get it to receive UDP traffic no matter what nuttcp options I try
to rate limit, etc.
Thanks,
Bob
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