Dear Mohammad,

The results are as follows:
PC-->ML403
TCP_SENDFILE : 38Mbps

ML403--->PC
TCP_SENDFILE: 155Mbps

This result is unreasonable. Because PC is more powerful than your board, 
so PC->board should be faster than board->PC.

The transfer rate from ML403 to PC has improved by a factor of 2,
I see on the posts here in the mailing list that you have reached a band 

width of 301Mbps.

Yes, with all features which could improve performance enabled, we can get 
around 300Mbps for TCP transfer. one more hint, did you enable caches on 
your system? perhaps it will help. Anyway, double check your hardware 
design to make sure all features are enabled.That's all I can suggest.

BR
Ming

----------------------------------------

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From: eemingliu@hotmail.com
To: mamsadegh@hotmail.com; akonovalov@ru.mvista.com; 

linuxppc-embedded@ozlabs.org; grant.likely@secretlab.ca

quoted

Subject: RE: ML403 gigabit ethernet bandwidth - 2.6 kernel
Date: Sat, 23 Jun 2007 19:10:16 +0000

Use the following command in Linux please:

ifconfig eth0 mtu 8982

As well you should do that on your PC in the measurement.

Ming

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From: Mohammad Sadegh Sadri
To: Ming Liu ,

,,

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Subject: RE: ML403 gigabit ethernet bandwidth - 2.6 kernel
Date: Sat, 23 Jun 2007 19:08:29 +0000


Dear Ming,

Really thanks for reply,

about thresholds and waitbound OK! I'll adjust them in adapter.c ,

but what about enabling jumbo frames? should I do any thing special to

enable Jumbo fram support?

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we were thinking that it is enabled by default. Is it?

thanks




----------------------------------------

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From: eemingliu@hotmail.com
To: mamsadegh@hotmail.com; akonovalov@ru.mvista.com;

linuxppc-embedded@ozlabs.org; grant.likely@secretlab.ca

quoted

quoted

Subject: RE: ML403 gigabit ethernet bandwidth - 2.6 kernel
Date: Sat, 23 Jun 2007 18:48:19 +0000

Dear Mohammad,
There are some parameters which could be adjusted to improve the
performance. They are: TX and RX_Threshold TX and RX_waitbound. In 

my

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system, we use TX_Threshold=16 and Rx_Threshold=8 and both 

waitbound=1.

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Also Jumbo frame of 8982 could be enable.

Try those hints and share your improvement with us.

BR
Ming

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From: Mohammad Sadegh Sadri
To: Andrei Konovalov , Linux PPC Linux

PPC, Grant Likely

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Subject: ML403 gigabit ethernet bandwidth - 2.6 kernel
Date: Sat, 23 Jun 2007 12:19:12 +0000


Dear all,

Recently we did a set of tests on performance of virtex 4FX hard 

TEMAC

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module using ML403

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we studied all of the posts here carefully: these are the system

characteristics;

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Board : ML403
EDK    : EDK9.1SP2
Hard TEMAC version and PLTEMAC version are both 3.0.a
PPC clock frequency :  300MHz
Kernel : 2.6.21-rc7 , downloaded from grant's git tree some thing 

near

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one

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week ago

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DMA type: 3 (sg dma)
DRE : enabled for TX and RX, (2)
CSUM offload is enabled for both of TX and RX
tx and rx fifo sizes : 131072 bits

the board comes up over NFS root file system completely and 

without

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any

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problems.

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PC system used for these tests is : CPU P4 Dual Core, 3.4GHz ,

2Gigabytes

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memory, Dual gigabit ethernet port, running linux 2.6.21.3

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We have tested the PC system band width and it can easily reach

966mbits/s

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when connected to the same PC. ( using the same cross cable used 

for

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ml403

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test)

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Netperf is compiled with TCP SEND FILE enabled, ( -DHAVE_SENDFILE)

(from board to PC)
netperf -t TCP_SENDFILE -H 10.10.10.250 -F /boot/zImage.elf -- -m

16384 -s

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87380 -S 87380

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the measured bandwidth for this test was just 40.66Mbits.
It is also true for netperf from PC to board.

we do not have any more idea about what we should do to improve 

the

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bandwidth.

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any help or ideas is appreciated...

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