netdev - Re: vxlan/veth performance issues on net.git + latest kernels

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Message-ID: <1386107714.30495.40.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Tue, 03 Dec 2013 13:55:14 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	or.gerlitz@...il.com, joseph.gasparakis@...el.com,
	hkchu@...gle.com, ogerlitz@...lanox.com, edumazet@...gle.com,
	ast@...mgrid.com, pshelar@...ira.com, netdev@...r.kernel.org
Subject: Re: vxlan/veth performance issues on net.git + latest kernels

On Tue, 2013-12-03 at 16:50 -0500, David Miller wrote:

> At this point I would use drop monitor to figure out in what context
> packets are being dropped on the floor.  There are scripts provided
> with the perf tool to utilize it.

Most easy way is to do :

perf record -e skb:kfree_skb -a -g sleep 10

perf report



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