netdev - Re: TCP and reordering

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Message-ID: <CAGK4HS8=NfcyvcNjC3h1wEjgQFCYoNeuWXj8n5Ruukeg+6j=SQ@mail.gmail.com>
Date:	Wed, 28 Nov 2012 00:22:34 -0800
From:	Vijay Subramanian <subramanian.vijay@...il.com>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	David Miller <davem@...emloft.net>, saku@...i.fi,
	rick.jones2@...com, netdev@...r.kernel.org
Subject: Re: TCP and reordering

>
> Short of going through whole dumps and looking, is there a good way to
> get statistics?
>

Hi David,

I don't believe reordering is tracked on the receiver side but on the
sender, there are SNMB_MIB items.
They can be tracked and can be viewed using nstat/netstat

# nstat -az | grep -i reorder
TcpExtTCPFACKReorder            0                  0.0
TcpExtTCPSACKReorder            0                  0.0
TcpExtTCPRenoReorder            0                  0.0
TcpExtTCPTSReorder              0                  0.0

Regards,
Vijay
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