Re: dst cache overflow

buakaw
2005-03-22T22:17:25Z

grep . /proc/sys/net/ipv4/route/*

/proc/sys/net/ipv4/route/error_burst:5000
/proc/sys/net/ipv4/route/error_cost:1000
grep: /proc/sys/net/ipv4/route/flush: Invalid argument
/proc/sys/net/ipv4/route/gc_elasticity:8
/proc/sys/net/ipv4/route/gc_interval:60
/proc/sys/net/ipv4/route/gc_min_interval:0
/proc/sys/net/ipv4/route/gc_min_interval_ms:500
/proc/sys/net/ipv4/route/gc_thresh:4096
/proc/sys/net/ipv4/route/gc_timeout:300
/proc/sys/net/ipv4/route/max_delay:10
/proc/sys/net/ipv4/route/max_size:65536
/proc/sys/net/ipv4/route/min_adv_mss:256
/proc/sys/net/ipv4/route/min_delay:2
/proc/sys/net/ipv4/route/min_pmtu:552
/proc/sys/net/ipv4/route/mtu_expires:600
/proc/sys/net/ipv4/route/redirect_load:20
/proc/sys/net/ipv4/route/redirect_number:9
/proc/sys/net/ipv4/route/redirect_silence:20480
/proc/sys/net/ipv4/route/secret_interval:600

cat /proc/net/stat/rt_cache

entries in_hit in_slow_tot in_no_route in_brd in_martian_dst
in_martian_src out_hit out_slow_tot out_slow_mc gc_total gc_ignored
gc_goal_miss
gc_dst_overflow in_hlist_search out_hlist_search
000000b9 02e05549 01fa47b9 00000000 00000000 00016e03 00000022
00251b22 00083e65 0000fe7e 00000008 00f15fc6 00f064e8 0000ebe8 0000eb57
08703a77
000087cf
000000b9 00000000 00000000 00000000 00000000 00000000 00000000
00000000 0001105a 000027ed 00000002 0000018f 00000171 0000000e 00000009
00000000
00003217

Quoting Eric Dumazet <dada1@cosmosbay.com>:

> buakaw@buakaw.homelinux.net a écrit :
>> I see on 2.6.10/2.6.11.3
>>
>
>
> Hello
>
> Could you give us the results of these commands :
>
> # grep . /proc/sys/net/ipv4/route/*
> # cat /proc/net/stat/rt_cache
>
> Eric Dumazet
>
>> Quoting Phil Oester <kernel@linuxace.com>:
>>
>>> On Tue, Mar 22, 2005 at 10:39:43AM +0200,
>>> buakaw@buakaw.homelinux.net wrote:
>>>
>>>>
>>>> computer's main job is to be router on small LAN with 10 users and so
me
>>>> services like qmail, apache, proftpd, shoutcast, squid, and ices on sl
ack
>>>> 10.1. Iptables and tc are used to limit bandwiwdth and the two bandwi
dthd
>>>> daemons are running on eth0 interface and all the time the cpu is use
d at
>>>> about 0.4% and additional 12% by ices when encoding mp3 on demand, an
d
>>>> the proccess ksoftirqd/0 randomally starts to use 100% of 0 cpu in nor
mal
>>>> situation and one time when the ksoftirqd/0 became crazy i noticed dst
>>>> cache overflow messages in syslog but there are more of thies lines in
>>>> logs about 5 times in 10 days period
>>>
>>>
>>> There was a problem fixed in the handling of fragments which caused dst
>>> cache overflow in the 2.6.11-rc series. Are you still seeing dst cache
>>> overflow on 2.6.11?
>>>
>>> Phil
>>>
>>
>>
>>
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