netdev - [RFC] iproute2/tc caching proposal

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Date:	Thu, 7 May 2009 01:03:37 +0300
From:	Denys Fedoryschenko <denys@...p.net.lb>
To:	Patrick McHardy <kaber@...sh.net>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Jarek Poplawski <jarkao2@...il.com>, netdev@...r.kernel.org
Subject: [RFC] iproute2/tc caching proposal

Since already someone did caching in iproute2, my changes is very trivial, but 
giving huge improvement in batch performance (30k rules 10minutes vs 30 
seconds).

ll_init_map is called in many places in tc, but since tc not changing 
anything, that can change this map, i think it is enough to call it only at 
the beginning, after rtnl_open().

Only one exclusion - tc monitor, because it is running long time, and things 
can change over this time, so we call ll_init_map on each received rtnetlink 
event.

Also please check "[RFC] [IPROUTE2] Filter class output by classid", if it is 
ok. Many people told it is useful patch.

View attachment "tc_caching.diff" of type "text/x-diff" (3663 bytes)