linux-kernel - Re: [PATCH net-next v2 04/12] net: stmmac: Add Split Header support and enable it in XGMAC cores

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Message-Id: <20190812.140618.1288127671943783439.davem@davemloft.net>
Date:   Mon, 12 Aug 2019 14:06:18 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     Jose.Abreu@...opsys.com
Cc:     netdev@...r.kernel.org, Joao.Pinto@...opsys.com,
        peppe.cavallaro@...com, alexandre.torgue@...com,
        mcoquelin.stm32@...il.com,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 04/12] net: stmmac: Add Split Header
 support and enable it in XGMAC cores

From: Jose Abreu <Jose.Abreu@...opsys.com>
Date: Mon, 12 Aug 2019 11:44:03 +0200

> 	- Add performance info (David)

Ummm...

Whilst cpu utilization is interesting, I might be mainly interested in
how this effects "networking" performance.  I find it very surprising
that it isn't obvious that this is what I wanted.

Do you not do performance testing on the networking level when you
make fundamental changes to how packets are processed by the
hardware/driver?