netdev - Re: rps perfomance WAS(Re: rps: question

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Date:	Sat, 17 Apr 2010 10:26:14 -0700
From:	Tom Herbert <therbert@...gle.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	hadi@...erus.ca, Changli Gao <xiaosuo@...il.com>,
	Rick Jones <rick.jones2@...com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	robert@...julf.net, andi@...stfloor.org
Subject: Re: rps perfomance WAS(Re: rps: question

> Tom, I am not sure what you describe is even respected for NAPI devices.
> (I hope you use napi devices in your company ;) )
>
> If we enqueue a skb to backlog, we also link our backlog napi into our
> poll_list, if not already there.
>
> So the loop in net_rx_action() will make us handle our backlog napi a
> bit after this network device napi (if time limit of 2 jiffies not
> elapsed) and *before* sending IPIS to remote cpus anyway.
>
Then I think that's a bug you've identified ;-)

>
>
>
>
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