netdev - Re: 802.3ad bonding brain damaged?

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Message-ID: <m3obzyq13j.fsf@ursa.amorsen.dk>
Date:	Tue, 09 Aug 2011 13:24:32 +0200
From:	Benny Amorsen <benny+usenet@...rsen.dk>
To:	Phillip Susi <psusi@....rr.com>
Cc:	Chris Friesen <chris.friesen@...band.com>,
	David Lamparter <equinox@...c24.net>, netdev@...r.kernel.org
Subject: Re: 802.3ad bonding brain damaged?

Phillip Susi <psusi@....rr.com> writes:

> Try, sure, but if you can't without seriously affecting performance,
> then having a knob for damn the torpedoes, full speed ahead mode seems
> reasonable.

Packet reordering often affects performance. It can easily be more
costly than losing half the bandwidth of a bundled link.

These days you are even dependent on the NIC firmware for good
performance with TCP for reordered packets -- if the NIC is bad at
handling them, you don't get any performance boost from GRO.

For UDP, applications have to handle it on their own.

/Benny
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