Thread (10 messages) flat view 10 messages, 3 authors, 2013-03-11

Re: [PATCH net-next 2/2] bnx2x: use the default NAPI weight

From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2013-03-10 08:38:07

On Wed, Mar 06, 2013 at 01:52:57PM -0800, Eric Dumazet wrote:
- BQL (incurring more TX completion rounds and possibility to
block/unblock a qdisc)
- ticket spinlocks, and even with the guard of qdisc busylock

-> we can have a starvation problem.
This only happens in cases where we aren't using multiqueue or
we're using it incorrectly, resulting in TX work from being split
over CPUs.

In that case it's not clear that it is starvation if we keep the
TX processing on one CPU.

Cheers,
-- 
Email: Herbert Xu [off-list ref]
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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