Date: Thu, 16 Feb 2017 21:14:19 +0100 From: Vincenzo Maffione <v.maffione@gmail.com> To: Slawa Olhovchenkov <slw@zxy.spb.ru> Cc: amir alipour <amir.alipour.r@gmail.com>, "freebsd-net@freebsd.org" <net@freebsd.org> Subject: Re: netmap_mem_get_info Message-ID: <CA%2B_eA9gFF8k8=qGOT3zYekPTYm2TiRx1WLsH_eioi4m%2BJdP6cw@mail.gmail.com> In-Reply-To: <20170214123621.GA15630@zxy.spb.ru> References: <CAJd3dBrC5ZHcTF1p0tNnBPPdBaSpfZxhe%2BnCDesM4-RTcUR=Sg@mail.gmail.com> <CA%2B_eA9g=O4hcg7b8O0wDpGjWeAiDSkE45jx4YAR3-oLRXCjv%2Bw@mail.gmail.com> <20170214123621.GA15630@zxy.spb.ru>
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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. Cheers, Vincenzo 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
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