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Date: Wed, 06 Aug 2008 10:28:35 +0200 From: Patrick McHardy <kaber@...sh.net> To: Denys Fedoryshchenko <denys@...p.net.lb> CC: Stephen Hemminger <shemminger@...ux-foundation.org>, netdev@...r.kernel.org Subject: Re: iproute2 proposal Denys Fedoryshchenko wrote: > While using iproute2 in batch mode i notice that adding 11362 rules, on system > with 500+ interfaces takes up to 1minute on Xeon 3.0 Ghz. > After "oprofiling" i got result: > > CPU: P4 / Xeon with 2 hyper-threads, speed 2992.84 MHz (estimated) > Counted GLOBAL_POWER_EVENTS events (time during which processor is not > stopped) with a unit mask of 0x01 (mandatory) count 100000 > samples % image name symbol name > 86166 57.3473 tc ll_remember_index > 48103 32.0147 tc parse_rtattr > 8497 5.6551 tc rtnl_dump_filter > 1751 1.1654 [vdso] (tgid:22801 range:0xb7f66000-0xb7f67000) (no symbols) > 1085 0.7221 tc tc_calc_xmittime > 672 0.4472 tc .plt > > I did small patch, and voila! batch finished in 2 seconds successfully! > > Proof of concept patch is attached. Not sure if it is not breaking any other > things. Waiting for any comments. It breaks batches that add links and then configure them. You need to invalidate the link map on "ip link add/del" and "ip tunnel add/del". -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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