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Date: Wed, 4 Nov 2009 13:39:59 +0000 From: Jarek Poplawski <jarkao2@...il.com> To: Eric Dumazet <eric.dumazet@...il.com> Cc: Ryousei Takano <ryousei@...il.com>, Stephen Hemminger <shemminger@...tta.com>, Patrick McHardy <kaber@...sh.net>, Linux Netdev List <netdev@...r.kernel.org>, takano-ryousei@...t.go.jp Subject: Re: HTB accuracy on 10GbE On 04-11-2009 12:31, Eric Dumazet wrote: .... > Maybe you can try changing class mtu to 40000 instead of 9000, and quantum to 60000 too > > tc class add dev $DEV parent 1: classid 1:1 htb rate ${rate}mbit mtu 40000 quantum 60000 > > (because your tcp stack sends large buffers ( ~ 60000 bytes) as your NIC can offload tcp segmentation) > Hmm..., testing htb scheduling exactness with tso/gso on seems kind of weather reporting. On the other hand, depending on hardware, these rates could be available with mtu 9000 and tso/gso off, unless I miss something. So maybe such a test would be interesting too? Then I'd suggest this one, erlier mentioned, patch to iproute2: http://marc.info/?l=linux-netdev&m=124453482324409&w=2 Best regards, Jarek P. -- 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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