[dpdk-dev] [PATCH v1] ixgbe_pmd: forbid tx_rs_thresh above 1 for all NICs but 82598

Matthew Hall mhall at mhcomputing.net
Fri Sep 11 19:17:54 CEST 2015


On Fri, Sep 11, 2015 at 07:18:20PM +0300, Vladislav Zolotarov wrote:
> We thought about linearization too. It's doable with extra mempool and it
> may be optional so that those that don't need could compile it out and/or
> disable it in a runtime...

High-level question. How realistic is sending a 40-segment frame in the first 
place? This whole thing seems kind of academic to me unless I missed 
something.

I usually use 2K pktmbufs and I don't think this is an uncommon size. Most 
jumbo frame hardware only does 9.5KB max frame size or so.

So I am having a hard time imagining how I'd end up with more than 10 segments 
as a worst-case scenario.

Matthew.


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