netdev - profile my proto

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Message-ID: <BANLkTi==HczThr66Yr0-Rm-RkEUw44sqrg@mail.gmail.com>
Date:	Tue, 12 Apr 2011 22:00:24 +0800
From:	zhou rui <zhourui.cn@...il.com>
To:	netdev@...r.kernel.org
Subject: profile my proto_hook.function

hi
I used a prot_hook(added via dev_add_pack,protocol=ETH_P_ALL) to
process packets in kernel part.but the performance was bad

ksoftirqd used almost 100% cpu on my 1G nic(intel e1000,w/o RSS) XEON
5400 hypertown machine.

looks my  packet processing is too slow. but how to profile this?
i.e. how many CPU resources used in softirq and normal kernel protocol
stack(tcp/ip,etc)
and how many used in my packet processing function?

and any idea to improve it?how about moving the processing function to driver?

thanks
rui
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