Re: [ECOS] The performance of ethernet driver and freebsd stack is not good

[Jack <jackeex0908 at gmail dot com>]

My point is that why the stack performance is so bad.
If my application is router or something networking application, how
can I imporve that?
About uclinux testing, I port the nc_test_slave program on the same
hardware platform but uclinux OS.
Now, I need to figure out that is ecos os suitable for networking
application, like router on my hardware platform?

Jack

On Wed, 12 Jan 2005 12:54:37 +0100, Andrew Lunn <andrew@lunn.ch> wrote:
> On Wed, Jan 12, 2005 at 06:57:20PM +0800, Jack wrote:
> > Thanks for your respose.
> >
> > My MCU is W90N740 which MAC device is built in.
> > I have checked the driver that using DMA and modified it from ks32c5000.
> > I would also like to know what the best performance of TCP/IP on ecos?
> 
> It depends on the hardware. A i386 machine which is actually a 1.4GHz
> Pentium is obviously going to do better than a 20Mhz ARM. The
> interface between the CPU and the network device will also make a
> difference, along with the size of the cache etc.
> 
> > And I try the Samsung SNDS100 development board using the same TCP/IP stack.
> > The performance is worse ,throughput is about 5Mb/s.
> 
> Firstly make sure you understand what the test is doing. You said you
> used the tcp_echo test on eCos. What did you compare it with on Linux?
> Did you port this program to Linux and run it there? What do the
> figures actually mean? You say you got 5Mb/s. The device running
> tcp_echo will both transmit and receive packets, so does that 5Mbit/s
> mean it is acutally transfering 10Mbits/s?
> 
> > Can I say that it isn't suitable for networking purpose on ecos?
> 
> Depends what you want to do with the network? 5Mb/s is great compared
> to a 52000 baud serial line for uploading new images to the
> device. But if your application is a video camera and you need to pump
> DVD quality video over the network then you will have problems.
> 
>        Andrew
> 
>

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