netdev - RE: Using ethernet device as efficient small packet generator

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Date:	Mon, 24 Jan 2011 17:34:04 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	juice@...gman.org
Cc:	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	"Loke, Chetan" <chetan.loke@...scout.com>,
	Jon Zhou <jon.zhou@...u.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: Using ethernet device as efficient small packet generator

Le lundi 24 janvier 2011 à 10:10 +0200, juice a écrit :

> Result: OK: 12345544(c12344739+d804) nsec, 10000000 (60byte,0frags)
>   810008pps 388Mb/sec (388803840bps) errors: 0
> 

> 
> This is a bit better than the previous maxim of 750064pps / 360Mb/sec
> that I was able to achieve without tuning parameters with ethtool, but
> still not near the 1.1Mpacks/s that shoud be doable with my card?

Please check what numbers you can get using dummy0 device instead of
real ethernet driver.

Here : (E5540  @ 2.53GHz) clone = 1

Result: OK: 34775941(c34775225+d716) nsec, 100000000 (60byte,0frags)
  2875551pps 1380Mb/sec (1380264480bps) errors: 0



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