netdev - Re: [net, 3/6] net: korina: increase tx/rx ring sizes

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Message-ID: <CACiydbLuVf_jsWor6-OJmwQhxfwd=dzBDnDQnJrp3owf8qCkQA@mail.gmail.com>
Date:   Tue, 17 Jan 2017 20:27:57 +0200
From:   Roman Yeryomin <leroi.lists@...il.com>
To:     David Miller <davem@...emloft.net>
Cc:     netdev@...r.kernel.org
Subject: Re: [net, 3/6] net: korina: increase tx/rx ring sizes

On 17 January 2017 at 19:58, David Miller <davem@...emloft.net> wrote:
> From: Roman Yeryomin <leroi.lists@...il.com>
> Date: Tue, 17 Jan 2017 19:32:36 +0200
>
>> Having larger ring sizes almost eliminates rx fifo overflow, thus improving performance.
>> This patch reduces rx overflow occurence by approximately 1000 times (from ~25k down to ~25 times per 3M frames)
>
> Those numbers don't mean much without full context.
>
> What kind of system, what kind of traffic, and over what kind of link?

MIPS rb532 board, TCP iperf3 test over 100M link, NATed speed ~55Mbps.
I can do more tests and provide more precise numbers, if needed.

Regards,
Roman