linux-kernel - Re: [PATCH net-next v2 1/5] lan743x: boost performance on cpu archs w/o dma cache snooping

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Date:   Fri, 12 Feb 2021 04:31:09 +0300
From:   Sergej Bauer <sbauer@...ckbox.su>
To:     thesven73@...il.com
Cc:     andrew@...n.ch, Markus.Elfring@....de, rtgbnm@...il.com,
        tharvey@...eworks.com, anders@...ningen.priv.no,
        sbauer@...ckbox.su,
        Bryan Whitehead <bryan.whitehead@...rochip.com>,
        UNGLinuxDriver@...rochip.com (maintainer:MICROCHIP LAN743X ETHERNET
        DRIVER), "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        netdev@...r.kernel.org (open list:MICROCHIP LAN743X ETHERNET DRIVER),
        linux-kernel@...r.kernel.org (open list)
Subject: Re: [PATCH net-next v2 1/5] lan743x: boost performance on cpu archs w/o dma cache snooping

On Friday, February 12, 2021 3:27:40 AM MSK you wrote:
> Hi Sergej, thank you for testing this !
Don't mention it, it's just a small assistance
 
> On Thu, Feb 11, 2021 at 7:18 PM Sergej Bauer <sbauer@...ckbox.su> wrote:
> > although whole set of tests might be an overly extensive, but after
> > applying patch v2 [1/5]
> > tests are:
> I am unfamiliar with the test_ber tool. Does this patch improve things?
v1 does a great job
number of lost packets decreased by 2.5-3 times
except of this, without the patch I have bit error rate about 0.423531 with MTU=1500
and now with this patch BER=0.

resuls of v2 are about the same as results of v1
tomorrow I can test it in more wide range of frame sizes.

tomorrow I can test v2 again, if it needs to be tested again.