netdev - Re: Centralizing support for TCAM?

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Message-ID: <20160902190203.GS16864@lunn.ch>
Date:   Fri, 2 Sep 2016 21:02:03 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     John Fastabend <john.fastabend@...il.com>
Cc:     Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org,
        jiri@...lanox.com, idosh@...lanox.com, john.fastabend@...el.com,
        ast@...nel.org, davem@...emloft.net, jhs@...atatu.com,
        ecree@...arflare.com, vivien.didelot@...oirfairelinux.com
Subject: Re: Centralizing support for TCAM?

> I need to get reasonable operations per second on the TCAM tables.
> Reasonable for me being somewhere in the 50k to 100k add/del/update
> commands per second. I'm hesitant to create more abstractions then
> are actually needed.

Hi John

That is an interesting requirement. Could you explain why?

The Marvell TCAM is accessed using MDIO. Maybe it can do 50
add/del/updates per second. For a WiFi access point, or cable modem,
even 50 per second seems ample, they get set at boot and never
changed.

	Andrew