Re: git: NFE - Change default RX ring size from 128 -> 256, Adju
Matthew Dillon wrote:
> commit 5df3a6aa72f98f69fa498e2249e71d7a14a0f16f
> Author: Matthew Dillon <dillon@apollo.backplane.com>
> Date: Wed Sep 9 09:10:58 2009 -0700
>
> NFE - Change default RX ring size from 128 -> 256, Adjust moderation timer.
>
> * NFE does not seem to be able to flow control the phy. TCP reception
> using window scaling and large socket bufs can blow out the receiver ring
> before the interrupt has a chance to drain it.
>
> This results in the receiver dropping a packet and the transmitter
> seeing bursts of duplicate TCP acks and having to go into recovery.
>
does this interact with checksum offloading on the device?
have a few NFE's lying around .. would be good to know more if available!
Thanks,
- Chris
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