From owner-freebsd-net@freebsd.org  Tue Feb 14 12:36:25 2017
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Date: Tue, 14 Feb 2017 15:36:21 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: Vincenzo Maffione <v.maffione@gmail.com>
Cc: amir alipour <amir.alipour.r@gmail.com>,
 "freebsd-net@freebsd.org" <net@freebsd.org>
Subject: Re: netmap_mem_get_info
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On Tue, Feb 14, 2017 at 12:26:55PM +0100, Vincenzo Maffione wrote:

> Hi,
>   Have you tried to play with netmap sysctl parameters like:
> 
> dev.netmap.buf_num
> dev.netmap.ring_num
> dev.netmap.if_num
> 
> those are listed in the sysctl section of the netmap man page.

man page hide details about calcul rules of this parameters.