ML403 gigabit ethernet bandwidth - 2.6 kernel
Glenn.G.Hart at us.westinghouse.com
Glenn.G.Hart at us.westinghouse.com
Tue Jun 26 01:21:40 EST 2007
All,
I am also very interested in the network throughput. I am using the Avenet
Mini-Module which has a V4FX12. The ML403 is very close to the
Mini-Module. I am getting a throughput of about 100 Mbps. The biggest
difference was turning on the cache. 100 MHz vs. 300 MHz only improved the
performance slightly. Using the checksum offloading was also a big help in
getting the throughput up. The RX Threshhold also helped, but the jumbo
frames did not seem to help. I am not sure what I can do to get the 300
Mbps Ming is getting. I saw on a previous post someone was using 128k
FIFO depth. I am using a 32k depth.
Glenn
(Embedded "Ming Liu" <eemingliu at hotmail.com>@ozlabs.org
image moved 06/25/2007 06:03 AM
to file:
pic11478.jpg)
Sent by:
linuxppc-embedded-bounces+glenn.g.hart=us.westinghouse.com at ozlabs.org
To: mamsadegh at hotmail.com
cc: akonovalov at ru.mvista.com, linuxppc-embedded at ozlabs.org
Subject: RE: ML403 gigabit ethernet bandwidth - 2.6 kernel
Security Level:? Internal
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
>
>
>
>
>----------------------------------------
> > From: eemingliu at hotmail.com
> > To: mamsadegh at hotmail.com; akonovalov at ru.mvista.com;
linuxppc-embedded at ozlabs.org; grant.likely at secretlab.ca
> > 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
> >
> >
> > >From: Mohammad Sadegh Sadri
> > >To: Ming Liu ,
> > ,,
> >
> > >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?
> > >
> > >we were thinking that it is enabled by default. Is it?
> > >
> > >thanks
> > >
> > >
> > >
> > >
> > >----------------------------------------
> > > > From: eemingliu at hotmail.com
> > > > To: mamsadegh at hotmail.com; akonovalov at ru.mvista.com;
> > linuxppc-embedded at ozlabs.org; grant.likely at secretlab.ca
> > > > 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
> > > > system, we use TX_Threshold=16 and Rx_Threshold=8 and both
waitbound=1.
> > > >
> > > > Also Jumbo frame of 8982 could be enable.
> > > >
> > > > Try those hints and share your improvement with us.
> > > >
> > > > BR
> > > > Ming
> > > >
> > > > >From: Mohammad Sadegh Sadri
> > > > >To: Andrei Konovalov , Linux PPC Linux
> > > > PPC, Grant Likely
> > > > >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
> > > > module using ML403
> > > > >
> > > > >we studied all of the posts here carefully: these are the system
> > > > characteristics;
> > > > >
> > > > >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
> > one
> > > > week ago
> > > > >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
> > any
> > > > problems.
> > > > >
> > > > >PC system used for these tests is : CPU P4 Dual Core, 3.4GHz ,
> > 2Gigabytes
> > > > memory, Dual gigabit ethernet port, running linux 2.6.21.3
> > > > >We have tested the PC system band width and it can easily reach
> > 966mbits/s
> > > > when connected to the same PC. ( using the same cross cable used
for
> > ml403
> > > > test)
> > > > >
> > > > >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
> > > > 87380 -S 87380
> > > > >
> > > > >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
> > > > bandwidth.
> > > > >any help or ideas is appreciated...
> > > > >
> > > > >_________________________________________________________________
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