Re: Re: Gigabit ethernet support of ppc440gx in 2.6 and 2.4

Re: Re: Gigabit ethernet support of ppc440gx in 2.6 and 2.4

[廖荣生]

Hi Eugene:

Does the TCP/IP Acceleration Hardware of 440GX have been supported in official 2.6 kernel?
How about the CPU utilization when you get 900+Mb/s? Since we want to do something such as simple datas codec at the same time.

Regards,

Lonsn
 
>
>On Wed, Feb 15, 2006 at 02:08:52PM +0800, ????????? wrote:
>> We want to get a data rate of 600Mbits/s over gigabit ethernet of ppc440gx.
>> How about the status of support to ppc440gx GigE in Linux kernel?
>> Which kernel version should we select? 2.6 or 2.4?
>
>GigE support for 440GX is in official 2.6. Patch for 2.4 is available 
>at http://kernel.ebshome.net. If you don't feel comfortable dealing 
>with kernel patches, I'd recommend 2.6
>
>Effective Ethernet throughput highly depends on packet size. For some 
>small packet sizes 600Mb/s is theoretically impossible over GigE.
>
>I achieved 900+ Mb/s TCP throughput with my driver (packets around 4K 
>long) and using sendfile(2) based test application.
>
>-- 
>Eugene
>
>

Re: Re: Gigabit ethernet support of ppc440gx in 2.6 and 2.4

[Eugene Surovegin]

On Thu, Feb 16, 2006 at 12:45:15PM +0800, ????????? wrote:
> Does the TCP/IP Acceleration Hardware of 440GX have been supported 
> in official 2.6 kernel?
> How about the CPU utilization when you get 900+Mb/s? Since we want 
> to do something such as simple datas codec at the same time.

My driver (both 2.4 and 2.6) supports TCP/UDP checksum offload. No TSO 
yet.

I don't remember exact CPU load numbers, but it was less than 20% for 
TX case (Ocotea was transmitting data).

-- 
Eugene