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Thu, 5 Aug 2021 13:27:21 +0000 To: Jan Viktorin <viktorin@cesnet.cz>, "dev@dpdk.org" <dev@dpdk.org> References: <20210805151451.59932409@coaster.localdomain> From: "Medvedkin, Vladimir" <vladimir.medvedkin@intel.com> Message-ID: <32cb2d90-2a08-ec06-0c71-031b6187c472@intel.com> Date: Thu, 5 Aug 2021 15:27:15 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.12.0 In-Reply-To: <20210805151451.59932409@coaster.localdomain> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-ClientProxiedBy: PR0P264CA0210.FRAP264.PROD.OUTLOOK.COM (2603:10a6:100:1f::30) To CO1PR11MB5012.namprd11.prod.outlook.com (2603:10b6:303:90::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.198.151.51] (192.198.151.51) by PR0P264CA0210.FRAP264.PROD.OUTLOOK.COM (2603:10a6:100:1f::30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4394.17 via Frontend Transport; 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So it is always used on _add()/_delete(). For simplicity you can consider it as an LPM's rule_info. But instead of keeping routes in a plane array as it is in LPM, FIB uses RIB which is more suitable binary tree. On 05/08/2021 15:14, Jan Viktorin wrote: > On Thu, 5 Aug 2021 15:08:13 +0200 > Vladimir Medvedkin <vladimir.medvedkin@intel.com> wrote: > >> This patch announces the experimental tag removal of all fib APIs, >> which have been experimental for 2 years. >> API will be promoted to stable in DPDK 21.11 > > Hi Vladimir, > > I have a question related to FIB. I am just learning how to use it and > I found that each FIB always creates a new RIB internally. There is no doc > about this topic... > > If I understand correctly, the underlying RIB is only used when > dummy_lookup() and dummy_modify() are used. But they are only used when the > configured mode is RTE_FIB_DUMMY. Is there any reason to create the RIB with > RTE_FIB_DIR24_8? > > The issue with this is that each RIB allocates a new mempool internally which > can waste quite a lot of never used memory that would be unused with DIR24_8 > implementation. > > Regards > Jan > >> >> >> Signed-off-by: Vladimir Medvedkin <vladimir.medved...@intel.com> >> --- >> doc/guides/rel_notes/deprecation.rst | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/doc/guides/rel_notes/deprecation.rst >> b/doc/guides/rel_notes/deprecation.rst >> index afb599a..58826a8 100644 >> --- a/doc/guides/rel_notes/deprecation.rst >> +++ b/doc/guides/rel_notes/deprecation.rst >> @@ -195,3 +195,5 @@ Deprecation Notices >> communicate events such as soft expiry with IPsec in lookaside >> mode. >> * rib: The ``rib`` library will be promoted from experimental to >> stable. + >> +* fib: The ``fib`` library will be promoted from experimental to >> stable. -- Regards, Vladimir