netdev - Re: pktgen performance hit due to memset.

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Message-Id: <20100723.185142.193690342.davem@davemloft.net>
Date:	Fri, 23 Jul 2010 18:51:42 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	greearb@...delatech.com
Cc:	netdev@...r.kernel.org
Subject: Re: pktgen performance hit due to memset.

From: Ben Greear <greearb@...delatech.com>
Date: Fri, 23 Jul 2010 16:14:19 -0700

> Some time back, someone added some memset() calls to pktgen to
> keep from leaking memory contents to the network.
> 
> At least in our modified version of pktgen, this caused about 25%
> performance degradation when sending 1514 byte pkts (multi-pkt == 0)
> on a pair of 10G ports.  It was easy enough to comment these memset
> calls out of course.
> 
> I don't mind if this patch stays in,
> but thought I'd post my findings in case anyone else wonders why
> their pktgen slowed down...

Thanks for the data point Ben.
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