Messages in this thread |  | | | Date | Sat, 14 Mar 2009 21:19:51 +0800 | | From | Herbert Xu <> | | Subject | Re: [RFC v2: Patch 1/3] net: hand off skb list to other cpu to submit to upper layer |
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On Fri, Mar 13, 2009 at 07:19:51PM -0700, David Miller wrote: > From: Tom Herbert <therbert@google.com> > Date: Fri, 13 Mar 2009 17:24:10 -0700 > > > Enabling HW multi-queue has somewhat higher CPU > > utilization though, the extra device interrupt load is not coming for > > free. We actually use the HW multi-queue in conjunction with our > > software steering to get maximum pps (about 20% more). > > This is a non-intuitive observation. Using HW multiqueue should be > cheaper than doing it in software, right?
Shared caches can play games with the numbers, we need to look at this a bit more.
Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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