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Date: Tue, 21 Feb 2017 17:35:20 +0100 From: Marcin Wojtas <mw@...ihalf.com> To: Jisheng Zhang <jszhang@...vell.com> Cc: David Miller <davem@...emloft.net>, Gregory Clément <gregory.clement@...e-electrons.com>, Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>, Arnd Bergmann <arnd@...db.de>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH net-next v3 0/4] net: mvneta: improve rx/tx performance Hi Jisheng, 2017-02-21 17:16 GMT+01:00 David Miller <davem@...emloft.net>: > From: Jisheng Zhang <jszhang@...vell.com> > Date: Tue, 21 Feb 2017 12:37:40 +0800 > >> Thanks for your review. >> >> The measurement is simple: record how much time we spent in mvneta_rx_swbm() >> for receiving 1GB data, something as below: > > Please use a standard tool for measuring performance, rather than profiling > the driver and trying to derive numbers that way. If possible in your setup, I suggest pushing 64B (and other sizes) packets uni or bidirectionally via 2 ports in L2 bridge mode. It's a good stress test, you'd get some meaningful numbers (also check cpu consumption with mpstat in the meantime). Best regards, Marcin
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