Date: Wed, 22 Dec 2010 23:55:08 +0600 From: Eugene Grosbein <egrosbein@rdtc.ru> To: Fabien Thomas <fabien.thomas@netasq.com> Cc: Jack F Vogel <jfv@freebsd.org>, net@freebsd.org Subject: Re: lagg/lacp poor traffic distribution Message-ID: <4D123B7C.1070104@rdtc.ru> In-Reply-To: <BDB1F984-9F2A-4746-B74E-4CABC952D3E2@netasq.com> References: <4D0CFEFF.3000902@rdtc.ru> <1292844095.1917.136.camel@stormi> <4D1083D6.6010707@rdtc.ru> <84530C06-AC2E-4E2B-BFD4-693902BB0FA6@netasq.com> <4D10B2F4.1060404@rdtc.ru> <90F64F73-F9A8-4FD6-9303-2FC0D3424751@netasq.com> <4D10BE3E.6030506@rdtc.ru> <BDB1F984-9F2A-4746-B74E-4CABC952D3E2@netasq.com>
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On 21.12.2010 21:57, Fabien Thomas wrote: >> irq262: igb0:que 0 157354922 7927 >> irq263: igb0:que 1 577369 29 >> irq264: igb0:que 2 280207 14 >> irq265: igb0:que 3 241826 12 >> irq266: igb0:link 2 0 >> irq267: igb1:que 0 164620363 8293 >> irq268: igb1:que 1 238678 12 >> irq269: igb1:que 2 248478 12 >> irq270: igb1:que 3 762453 38 >> irq271: igb1:link 3 0 >> cpu2: timer 39576052 1993 >> cpu3: timer 39576095 1993 >> cpu1: timer 39575913 1993 >> Total 989503327 49849 >> >> It seems I have four queues per igb card but only one of them works? > > Yes. > > Jack will certainly confirm but it seems that RSS hash does not seems to take vlan in account and default to queue0 ? I've just read "Microsoft Receive-Side Scaling" documentation, http://download.microsoft.com/download/5/d/6/5d6eaf2b-7ddf-476b-93dc-7cf0072878e6/ndis_rss.doc RSS defines that hash function may take IP and optionally port numbers only, not vlan tags. In case of PPPoE-only traffic this card's ability to classify traffic voids. Then, unpatched lagg fails to share load over outgoing interface ports. It seems, we really need sysctl disabling lagg's use of flows, don't we? Eugene Grosbein
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