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In-Reply-To: <20180424085553.GA6887@kib.kiev.ua>
References: <20180424085553.GA6887@kib.kiev.ua>
From: Ryan Stone <rysto32@gmail.com>
Date: Wed, 25 Apr 2018 16:04:13 -0400
Message-ID: <CAFMmRNwKXCxGbz7zmOsiCMWbY3+rBzGwJJo_HHkAbbhEz2UfLQ@mail.gmail.com>
Subject: Re: mlx5(4) jumbo receive
To: Konstantin Belousov <kostikbel@gmail.com>
Cc: FreeBSD Current <current@freebsd.org>, menny@mellanox.com,
 FreeBSD Net <net@freebsd.org>
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On Tue, Apr 24, 2018 at 4:55 AM, Konstantin Belousov
<kostikbel@gmail.com> wrote:
> +#ifndef MLX5E_MAX_RX_BYTES
> +#define        MLX5E_MAX_RX_BYTES MCLBYTES
> +#endif

Why do you use a 2KB buffer rather than a PAGE_SIZE'd buffer?
MJUMPAGESIZE should offer significantly better performance for jumbo
frames without increasing the risk of memory fragmentation.