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Mon, 6 Jun 2016 14:38:00 +0000 From: Shreyansh Jain <shreyansh.jain@nxp.com> To: David Hunt <david.hunt@intel.com>, "dev@dpdk.org" <dev@dpdk.org> CC: "olivier.matz@6wind.com" <olivier.matz@6wind.com>, "viktorin@rehivetech.com" <viktorin@rehivetech.com>, "jerin.jacob@caviumnetworks.com" <jerin.jacob@caviumnetworks.com> Thread-Topic: [dpdk-dev] [PATCH v8 1/3] mempool: support external mempool operations Thread-Index: AQHRvaht0RXQVWk8xkWSzpGmKHutFp/chXRA Date: Mon, 6 Jun 2016 14:38:00 +0000 Message-ID: <DB5PR0401MB20545CC8494FB0965C338EE2905C0@DB5PR0401MB2054.eurprd04.prod.outlook.com> References: <1464874043-67467-1-git-send-email-david.hunt@intel.com> <1464965906-108927-1-git-send-email-david.hunt@intel.com> <1464965906-108927-2-git-send-email-david.hunt@intel.com> In-Reply-To: <1464965906-108927-2-git-send-email-david.hunt@intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=shreyansh.jain@nxp.com; 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SRVR:DB5PR0401MB2054; BCL:0; PCL:0; RULEID:; SRVR:DB5PR0401MB2054; x-forefront-prvs: 096507C068 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(6009001)(199003)(189002)(2906002)(5008740100001)(4326007)(33656002)(87936001)(6116002)(76576001)(5001770100001)(97736004)(3660700001)(102836003)(189998001)(3846002)(3280700002)(586003)(5002640100001)(5003600100002)(10400500002)(105586002)(5004730100002)(106356001)(106116001)(66066001)(122556002)(76176999)(11100500001)(2900100001)(2950100001)(92566002)(86362001)(81156014)(50986999)(101416001)(54356999)(8936002)(74316001)(68736007)(2501003)(81166006)(77096005)(9686002); DIR:OUT; SFP:1101; SCL:1; SRVR:DB5PR0401MB2054; H:DB5PR0401MB2054.eurprd04.prod.outlook.com; FPR:; SPF:None; PTR:InfoNoRecords; A:1; MX:1; LANG:en; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) spamdiagnosticoutput: 1:23 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Jun 2016 14:38:00.8048 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB5PR0401MB2054 Subject: Re: [dpdk-dev] [PATCH v8 1/3] mempool: support external mempool operations X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK <dev.dpdk.org> List-Unsubscribe: <http://dpdk.org/ml/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://dpdk.org/ml/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <http://dpdk.org/ml/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> X-List-Received-Date: Mon, 06 Jun 2016 14:38:02 -0000 Hi, (Apologies for overly-eager email sent on this thread earlier. Will be more= careful in future). This is more of a question/clarification than a comment. (And I have taken = only some snippets from original mail to keep it cleaner) <snip> > +MEMPOOL_REGISTER_OPS(ops_mp_mc); > +MEMPOOL_REGISTER_OPS(ops_sp_sc); > +MEMPOOL_REGISTER_OPS(ops_mp_sc); > +MEMPOOL_REGISTER_OPS(ops_sp_mc); <snip> >>From the above what I understand is that multiple packet pool handlers can = be created. I have a use-case where application has multiple pools but only the packet = pool is hardware backed. Using the hardware for general buffer requirements= would prove costly. >>From what I understand from the patch, selection of the pool is based on th= e flags below. <snip> > + /* > + * Since we have 4 combinations of the SP/SC/MP/MC examine the flags to > + * set the correct index into the table of ops structs. > + */ > + if (flags & (MEMPOOL_F_SP_PUT | MEMPOOL_F_SC_GET)) > + rte_mempool_set_ops_byname(mp, "ring_sp_sc"); > + else if (flags & MEMPOOL_F_SP_PUT) > + rte_mempool_set_ops_byname(mp, "ring_sp_mc"); > + else if (flags & MEMPOOL_F_SC_GET) > + rte_mempool_set_ops_byname(mp, "ring_mp_sc"); > + else > + rte_mempool_set_ops_byname(mp, "ring_mp_mc"); > + Is there any way I can achieve the above use case of multiple pools which c= an be selected by an application - something like a run-time toggle/flag? - Shreyansh