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Date: Thu, 16 Feb 2017 23:38:14 +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 Thu, Feb 16, 2017 at 09:14:19PM +0100, Vincenzo Maffione wrote:

> Hi,
>   You're right, we'll try to add more details.
> 
> In any case, buf_size, ring_size and if_size are the sizes in bytes of each
> buffer, ring and netmap_if (control data structure), respectively.
> So the maximum amount of slots for each ring is ring_size/16, as 16 is the
> size in bytes of struct netmap_slot.
> 
> On the other side, buf_num, ring_num and if_num are the total number of
> biffers, rings and netmap_if objects in each netmap memory area (aka
> "allocator").
> By default there is a single memory area used by all the hardware NICs and
> a separate memory area for each VALE port.
> This is already configurable, however.

This values also depends on open netmap descriptors, right?

> 2017-02-14 13:36 GMT+01:00 Slawa Olhovchenkov <slw@zxy.spb.ru>:
> 
> > 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.
> >
> 
> 
> 
> -- 
> Vincenzo Maffione