buakaw@buakaw.homelinux.net a écrit :
> 
> 
> 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

OK, route cache settings are hard to tune.

Try these settings :

echo 1 >/proc/sys/net/ipv4/route/gc_interval
echo 2 >/proc/sys/net/ipv4/route/gc_elasticity
echo 150 >/proc/sys/net/ipv4/route/gc_timeout
echo 8192 >/proc/sys/net/ipv4/route/gc_thresh

You might want to boot adding this "rhash_entries=8192" in your kernel boot string (append="rhash_entries=8192" in lilo.conf)
(If you change rhash_entries, change also /proc/sys/net/ipv4/route/gc_thresh accordingly)

You might also try this patch.

Eric Dumazet