From: Eric Dumazet <dada1@cosmosbay.com>
To: Denys Fedoryshchenko <denys@visp.net.lb>
Cc: netdev@vger.kernel.org
Subject: Re: packetloss, on e1000e worse than r8169?
Date: Mon, 16 Jun 2008 23:29:01 +0200 [thread overview]
Message-ID: <4856DB1D.80503@cosmosbay.com> (raw)
In-Reply-To: <20080616211213.M76390@visp.net.lb>
Denys Fedoryshchenko a écrit :
>> Are you sure nf_conntrack or ip route cache is not killing you ?
>>
>> Filling 512 or 1024 RX ring on Gigabit link can be very fast, especially
>> if ip route cache is full.
>>
>> rtstat -c10 -i1
>
> conntrack disabled, it is just enabled for second on load and then unloaded.
ok :)
>
> MegaRouter-KARAM ~ # rtstat -c10 -i1
> 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|
> 63448|229209146|22225578| 13754| 12| 2822| 0| 104|
> 54647| 27606| 570|21782075|21776859| 74| 0|215222374| 61294|
> 66085| 141462| 5268| 8| 0| 4| 0| 0|
> 4| 2| 0| 5274| 5274| 0| 0| 254424| 10|
> 59947| 132660| 20570| 4| 0| 4| 0| 0|
> 8| 14| 0| 20584| 20584| 0| 0| 185738| 24|
> 56995| 132416| 16918| 12| 0| 2| 0| 0|
> 6| 4| 0| 16932| 16932| 0| 0| 68378| 8|
> 56422| 137058| 12336| 8| 0| 0| 0| 0|
> 8| 2| 0| 12344| 12344| 0| 0| 84022| 4|
> 56819| 140526| 9896| 10| 0| 0| 0| 0|
> 6| 0| 0| 9898| 9896| 0| 0| 99138| 4|
> 57580| 136936| 8370| 10| 0| 2| 0| 0|
> 8| 6| 2| 8378| 8378| 0| 0| 110834| 22|
> 51583| 120138| 26828| 20| 0| 0| 0| 0|
> 4| 8| 0| 26848| 26848| 0| 0| 99292| 24|
> 49354| 128076| 21606| 14| 0| 2| 0| 0|
> 0| 10| 0| 21626| 21626| 0| 0| 60546| 12|
>
>
>
Hum... typical IP route cache congestion ?
echo 1 >/proc/sys/net/ipv4/route/gc_interval
echo 2 >/proc/sys/net/ipv4/route/gc_elasticity
You might want to boot with rhash_entries=131071 to play with IP route cache size, but I am not sure your workload can fit.
next prev parent reply other threads:[~2008-06-16 21:29 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-16 19:37 packetloss, on e1000e worse than r8169? Denys Fedoryshchenko
2008-06-16 19:48 ` Eric Dumazet
2008-06-16 20:20 ` Denys Fedoryshchenko
2008-06-16 20:23 ` Denys Fedoryshchenko
2008-06-16 20:36 ` Kok, Auke
[not found] ` <20080616204411.M52834@visp.net.lb>
2008-06-16 20:49 ` Kok, Auke
2008-06-16 20:59 ` Denys Fedoryshchenko
2008-06-16 21:13 ` Denys Fedoryshchenko
2008-06-16 21:29 ` Eric Dumazet [this message]
2008-06-16 21:41 ` Denys Fedoryshchenko
2008-06-16 21:41 ` Denys Fedoryshchenko
[not found] ` <20080616213419.M212@visp.net.lb>
2008-06-16 21:41 ` Eric Dumazet
2008-06-16 21:44 ` Eric Dumazet
2008-06-16 22:08 ` Denys Fedoryshchenko
2008-06-17 2:17 ` Eric Dumazet
2008-06-17 2:47 ` Denys Fedoryshchenko
2008-06-16 22:08 ` Denys Fedoryshchenko
2008-06-16 23:24 ` Brandeburg, Jesse
2008-06-17 1:53 ` Denys Fedoryshchenko
2008-06-17 6:46 ` Denys Fedoryshchenko
2008-06-17 17:22 ` Denys Fedoryshchenko
2008-06-18 0:58 ` Brandeburg, Jesse
2008-06-17 21:04 ` Denys Fedoryshchenko
2008-06-18 16:50 ` Brandeburg, Jesse
2008-06-18 17:03 ` Denys Fedoryshchenko
2008-06-16 21:17 ` Denys Fedoryshchenko
2008-06-16 21:05 ` Eric Dumazet
2008-06-16 20:52 ` Denys Fedoryshchenko
2008-06-16 20:15 ` Auke Kok
2008-06-16 20:29 ` Denys Fedoryshchenko
2008-06-16 20:26 ` Francois Romieu
2008-06-16 20:37 ` Waskiewicz Jr, Peter P
2008-06-16 20:42 ` Denys Fedoryshchenko
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