Re: [PATCH 2.6] ixgb: fix ixgb_intr looping checks

[Andrew Morton <akpm@xxxxxxxx>]

Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx> wrote:
>
> On Mon, 8 Nov 2004, Andrew Morton wrote:
>  > > This patch undoes a change that we believe will impact performance
>  > adversely,
>  > > by creating possibly too long a delay between servicing completions.
>  > 
>  > Maybe.  But now take a look at how much additional pointless work will be
>  > done in the common case.  For instance, every tx completion will incur a
>  > call to ixgb_clean_rx_irq(), which then calls ixgb_alloc_rx_buffers().
> 
>  Is your common case transmits only?

hm, good question.  Usually not, I guess.  IIRC TCP normally runs with
2Tx:1Rx.  NFS-over-UDP will send and receive a lot of back-to-back frames.