netdev - Re: [PATCH 4/7] sh_eth: offload RX checksum on R8A7740

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Message-ID: <CAMuHMdWcgpW50m5p2dG74xV0L-toieU9_N7-JDkpatc=3ssJ_Q@mail.gmail.com>
Date:   Thu, 31 Jan 2019 12:11:38 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:     netdev <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux-sh list <linux-sh@...r.kernel.org>
Subject: Re: [PATCH 4/7] sh_eth: offload RX checksum on R8A7740

Hi Sergei,

On Thu, Jan 31, 2019 at 11:52 AM Sergei Shtylyov
<sergei.shtylyov@...entembedded.com> wrote:
> On 01/29/2019 09:20 PM, Geert Uytterhoeven wrote:
> >> The R-Mobile A1 (R8A7740) SoC manual describes the Ether MAC's RX checksum
> >> offload the same way as it's implemented in the EtherAVB MAC...
> >>
> >> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
> >
> > Thanks for your patch!
> >
> > Running netperf as described in patch 2/7, perf tells me there's a reduction
> > for csum_partial from ca. 1.9% to 0.01%, so this feature seems to work.
>
>    Hm, what about do_csum()?

I had looked for that, but didn't see it. Probably inlined, as it's static.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds