linux-kernel - Re: [PATCH v2 RESEND 1/1] net: fec: add xdp and page pool statistics

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Date:   Mon, 14 Nov 2022 14:57:26 +0100
From:   Alexander Lobakin <alexandr.lobakin@...el.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Alexander Lobakin <alexandr.lobakin@...el.com>,
        Shenwei Wang <shenwei.wang@....com>,
        Paolo Abeni <pabeni@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "imx@...ts.linux.dev" <imx@...ts.linux.dev>
Subject: Re: [PATCH v2 RESEND 1/1] net: fec: add xdp and page pool statistics

From: Andrew Lunn <andrew@...n.ch>
Date: Mon, 14 Nov 2022 14:50:54 +0100

> >    What is your machine and how fast your link is?
> 
> Some FEC implementations are Fast Ethernet. Others are 1G.
> 
> I expect Shenwei is testing on a fast 64 bit machine with 1G, but
> there are slow 32bit machines with Fast ethernet or 1G.

Okay. I can say I have link speed on 1G on MIPS32, even on those
which are 1-core 600 MHz. And when I was adding more driver stats,
all based on u64_stats_t, I couldn't spot any visible regression.
100-150 Kbps maybe?

> 
>      Andrew

Thanks,
Olek