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Date: Thu, 27 Mar 2008 15:52:19 +0100 From: Eric Dumazet <dada1@...mosbay.com> To: Denys Fedoryshchenko <denys@...p.net.lb> Cc: David Miller <davem@...emloft.net>, netdev@...r.kernel.org, kaber@...sh.net, netfilter-devel@...r.kernel.org Subject: Re: kernel 2.6.25-rc7 highly unstable on high load Denys Fedoryshchenko a écrit : > Yes, it seems related to routing. Before such thing was not happening (maybe > because TRIE was operating better?). > > Here is info at "peak time", i disable nmi_watchdog now, so garbage collector > will not be triggered by nmi watchdog. > > rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache| > rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache| > rt_cache| > entries| in_hit|in_slow_|in_slow_|in_no_ro| in_brd|in_marti|in_marti| > out_hit|out_slow|out_slow|gc_total|gc_ignor|gc_goal_|gc_dst_o|in_hlist| > out_hlis| > | | tot| mc| ute| | an_dst| > an_src| | _tot| _mc| | ed| miss| verflow| > _search|t_search| > 247011| 2255410| 162866| 0| 610| 5| 0| 0| > 33761| 8574| 0| 165475| 165307| 0| 0|10407428| 174948| > 251810| 43087| 2782| 0| 9| 0| 0| 0| > 618| 122| 0| 2912| 2909| 0| 0| 241946| 3796| > 256277| 43035| 2739| 0| 9| 0| 0| 0| > 595| 121| 0| 2867| 2864| 0| 0| 243724| 3748| > 260177| 43596| 2647| 0| 8| 0| 0| 0| > 672| 123| 0| 2778| 2776| 0| 0| 246880| 4048| > 232741| 42270| 2759| 0| 15| 0| 0| 0| > 665| 135| 0| 2910| 2907| 0| 0| 233990| 3938| > 226623| 42615| 2792| 0| 11| 0| 0| 0| > 723| 132| 0| 2935| 2932| 0| 0| 218378| 3862| > 233190| 42397| 2778| 0| 8| 0| 0| 0| > 675| 128| 0| 2913| 2909| 0| 0| 214258| 3703| > 239093| 42342| 2713| 0| 9| 0| 0| 0| > 764| 126| 0| 2847| 2845| 0| 0| 216453| 4080| > 150539| 36992| 7564| 0| 58| 0| 0| 0| > 539| 283| 0| 7902| 7900| 0| 0| 93459| 1996| > 154441| 40258| 4422| 0| 12| 0| 0| 0| > 655| 212| 0| 4644| 4640| 0| 0| 77271| 1458| > > On one "crash" i got > Mar 27 11:27:15 205.177.186.74 [ 7141.156100] dst cache overflow > Mar 27 11:27:15 205.177.186.74 [ 7141.002291] dst cache overflow > Mar 27 11:27:15 205.177.186.74 [ 7141.162756] dst cache overflow > > So i increase now routes amount more than 512K to 5120K, and will see more. > You want to tune route cache for your special needs, and not permit it to store 5 millions entries ! # default is a gc every 60 seconds, not good for large caches echo 1 >/proc/sys/net/ipv4/route/gc_interval # default is 8 entries per slot.. echo 4 >/proc/sys/net/ipv4/route/gc_elasticity # avoid a flush every 10 minutes echo 3600 >/proc/sys/net/ipv4/route/secret_interval -- 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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