Re: Poor gige performance with 2.4.20-pre*

["Xiaoliang \(David\) Wei" <weixl@caltech.edu>]

Hi,
    Did you do the experiments on WAN or LAN? What's the other
configurations, such as: The sending/receiving buffer(I think it should be
larger than Bandwidth*Delay)?

>   Hi, all. For a while now I've noticed poor performance with gige
> cards under 2.4.19 and 2.4.20-pre*. At first I thought it was because
> of the cheap-ass Addtron cards I bought (these use the ns83820 chip).
> But now that the Intel E1000 cards are pretty cheap too, I've grabbed
> a couple (part number: PWLA8390MT) and see the same problem. In fact,
> the E1000 cards are no better than the Addtron cards. I'm using the
> D-Link DGS-1008T 8-port gige switch. MTU=1500 bytes.
>
> The basic test I do is to send 100 MB over a TCP connection from one
> machine to the other. The results are:
>
> Dual PIII 450 MHz -> Dual Athalon 1.6 GHz yields 58 MB/s
> Dual Athalon 1.6 GHz -> Dual PIII 450 MHz yields 23 MB/s
>
> This is quite a bit less than what gige is supposed to give. Is this
> expected?
>
> Regards,
>
> Richard....
> Permanent: rgooch@atnf.csiro.au
> Current:   rgooch@ras.ucalgary.ca
>
>
>
>