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GET /api/patches/28467/?format=api
{ "id": 28467, "url": "https://patches.dpdk.org/api/patches/28467/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/patch/20170907153042.30890-8-santosh.shukla@caviumnetworks.com/", "project": { "id": 1, "url": "https://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<20170907153042.30890-8-santosh.shukla@caviumnetworks.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20170907153042.30890-8-santosh.shukla@caviumnetworks.com", "date": "2017-09-07T15:30:41", "name": "[dpdk-dev,v6,7/8] mempool: introduce block size align flag", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "2f8eca0e222daa1d583b2dfcd9409f40b9484dde", "submitter": { "id": 480, "url": "https://patches.dpdk.org/api/people/480/?format=api", "name": "Santosh Shukla", "email": "santosh.shukla@caviumnetworks.com" }, "delegate": null, "mbox": "https://patches.dpdk.org/project/dpdk/patch/20170907153042.30890-8-santosh.shukla@caviumnetworks.com/mbox/", "series": [], "comments": "https://patches.dpdk.org/api/patches/28467/comments/", "check": "success", "checks": "https://patches.dpdk.org/api/patches/28467/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [IPv6:::1])\n\tby dpdk.org (Postfix) with ESMTP id 9DE3F199D6;\n\tThu, 7 Sep 2017 17:31:49 +0200 (CEST)", "from NAM03-BY2-obe.outbound.protection.outlook.com\n\t(mail-by2nam03on0057.outbound.protection.outlook.com [104.47.42.57])\n\tby dpdk.org (Postfix) with ESMTP id D938D199BE\n\tfor <dev@dpdk.org>; Thu, 7 Sep 2017 17:31:47 +0200 (CEST)", "from localhost.localdomain (14.140.2.178) by\n\tMWHPR07MB3101.namprd07.prod.outlook.com (10.172.95.7) with Microsoft\n\tSMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id\n\t15.20.13.10; Thu, 7 Sep 2017 15:31:44 +0000" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=CAVIUMNETWORKS.onmicrosoft.com; s=selector1-cavium-com;\n\th=From:Date:Subject:Message-ID:Content-Type:MIME-Version;\n\tbh=vkJwveSmf/xPIFDLyXWWgjH3U4nm4Uk0p7qF9g5f93E=;\n\tb=HpEeODr8HKXUysF5zxuOh3ZTl9D4GS0kZMN2a3gX8kSKG+YHAQjpM+3f0ZFVVld5PTnkZwSGQVabMREIsoXso0uAtUZh+WdyH+KeaYz1NNhSjFWUoi0fsRKNPZ/RGuxUgf+2McZoZPjNO9J7zW46KJY5pTTjvCgcOAVm6qDWHaE=", "Authentication-Results": "spf=none (sender IP is )\n\tsmtp.mailfrom=Santosh.Shukla@cavium.com; ", "From": "Santosh Shukla <santosh.shukla@caviumnetworks.com>", "To": "olivier.matz@6wind.com,\n\tdev@dpdk.org", "Cc": "thomas@monjalon.net, jerin.jacob@caviumnetworks.com,\n\themant.agrawal@nxp.com,\n\tSantosh Shukla <santosh.shukla@caviumnetworks.com>", "Date": "Thu, 7 Sep 2017 21:00:41 +0530", "Message-Id": "<20170907153042.30890-8-santosh.shukla@caviumnetworks.com>", "X-Mailer": "git-send-email 2.14.1", "In-Reply-To": "<20170907153042.30890-1-santosh.shukla@caviumnetworks.com>", "References": "<20170906112834.32378-1-santosh.shukla@caviumnetworks.com>\n\t<20170907153042.30890-1-santosh.shukla@caviumnetworks.com>", "MIME-Version": "1.0", "Content-Type": "text/plain", "X-Originating-IP": "[14.140.2.178]", "X-ClientProxiedBy": "BM1PR01CA0072.INDPRD01.PROD.OUTLOOK.COM (10.174.208.140)\n\tTo MWHPR07MB3101.namprd07.prod.outlook.com (10.172.95.7)", "X-MS-PublicTrafficType": "Email", "X-MS-Office365-Filtering-Correlation-Id": "9475833d-d49e-4068-0b52-08d4f6058cc5", "X-Microsoft-Antispam": "UriScan:; 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PCL:0;\n\tRULEID:(100000700101)(100105000095)(100000701101)(100105300095)(100000702101)(100105100095)(6040450)(2401047)(5005006)(8121501046)(100000703101)(100105400095)(93006095)(3002001)(10201501046)(6041248)(20161123555025)(20161123558100)(20161123564025)(201703131423075)(201702281528075)(201703061421075)(201703061406153)(20161123562025)(20161123560025)(6072148)(201708071742011)(100000704101)(100105200095)(100000705101)(100105500095);\n\tSRVR:MWHPR07MB3101; BCL:0; PCL:0;\n\tRULEID:(100000800101)(100110000095)(100000801101)(100110300095)(100000802101)(100110100095)(100000803101)(100110400095)(100000804101)(100110200095)(100000805101)(100110500095);\n\tSRVR:MWHPR07MB3101; ", "X-Forefront-PRVS": "04238CD941", "X-Forefront-Antispam-Report": "SFV:NSPM;\n\tSFS:(10009020)(6069001)(6009001)(189002)(199003)(25786009)(5660300001)(966005)(50986999)(76176999)(42186005)(106356001)(105586002)(4326008)(33646002)(8656003)(66066001)(53376002)(53936002)(36756003)(107886003)(110136004)(8936002)(50226002)(305945005)(6306002)(8676002)(7736002)(5003940100001)(1076002)(6512007)(47776003)(81156014)(3846002)(50466002)(6116002)(5009440100003)(101416001)(68736007)(48376002)(97736004)(81166006)(189998001)(2906002)(72206003)(6506006)(2950100002)(42882006)(6666003)(478600001)(6486002)(110426004);\n\tDIR:OUT; SFP:1101; SCL:1; SRVR:MWHPR07MB3101; H:localhost.localdomain;\n\tFPR:; \n\tSPF:None; PTR:InfoNoRecords; MX:1; A:1; LANG:en; ", "Received-SPF": "None (protection.outlook.com: cavium.com does not designate\n\tpermitted sender hosts)", "SpamDiagnosticOutput": "1:99", "SpamDiagnosticMetadata": "NSPM", "X-OriginatorOrg": "caviumnetworks.com", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "07 Sep 2017 15:31:44.0419\n\t(UTC)", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-CrossTenant-Id": "711e4ccf-2e9b-4bcf-a551-4094005b6194", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "MWHPR07MB3101", "Subject": "[dpdk-dev] [PATCH v6 7/8] mempool: introduce block size align flag", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<http://dpdk.org/ml/options/dev>,\n\t<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>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Some mempool hw like octeontx/fpa block, demands block size\n(/total_elem_sz) aligned object start address.\n\nIntroducing an MEMPOOL_F_CAPA_BLK_ALIGNED_OBJECTS flag.\nIf this flag is set:\n- Align object start address(vaddr) to a multiple of total_elt_sz.\n- Allocate one additional object. Additional object is needed to make\n sure that requested 'n' object gets correctly populated.\n\nExample:\n- Let's say that we get 'x' size of memory chunk from memzone.\n- And application has requested 'n' object from mempool.\n- Ideally, we start using objects at start address 0 to...(x-block_sz)\n for n obj.\n- Not necessarily first object address i.e. 0 is aligned to block_sz.\n- So we derive 'offset' value for block_sz alignment purpose i.e..'off'.\n- That 'off' makes sure that start address of object is blk_sz aligned.\n- Calculating 'off' may end up sacrificing first block_sz area of\n memzone area x. So total number of the object which can fit in the\n pool area is n-1, Which is incorrect behavior.\n\nTherefore we request one additional object (/block_sz area) from memzone\nwhen MEMPOOL_F_CAPA_BLK_ALIGNED_OBJECTS flag is set.\n\nSigned-off-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>\nSigned-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>\n---\nv5 --> v6:\n- Renamed from MEMPOOL_F_BLK_ALIGNED_OBJECTS to\n MEMPOOL_F_CAPA_BLK_ALIGNED_OBJECTS. (Suggested by Olivier)\n- Updated Capability flag descrioption (Suggested by Olivier) \n\nHistory refer [1]\n[1] http://dpdk.org/dev/patchwork/patch/28418/\n\nv4 --> v5:\n- Added vaddr in git description of patch (suggested by Olivier)\n- Renamed to aligned flag to MEMPOOL_F_BLK_ALIGNED_OBJECTS (suggested by\n Olivier)\nRefer [2].\n[2] http://dpdk.org/dev/patchwork/patch/27600/\n\n lib/librte_mempool/rte_mempool.c | 19 ++++++++++++++++---\n lib/librte_mempool/rte_mempool.h | 12 ++++++++++++\n 2 files changed, 28 insertions(+), 3 deletions(-)", "diff": "diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c\nindex 146e38675..decdda3a6 100644\n--- a/lib/librte_mempool/rte_mempool.c\n+++ b/lib/librte_mempool/rte_mempool.c\n@@ -239,10 +239,15 @@ rte_mempool_calc_obj_size(uint32_t elt_size, uint32_t flags,\n */\n size_t\n rte_mempool_xmem_size(uint32_t elt_num, size_t total_elt_sz, uint32_t pg_shift,\n-\t\t __rte_unused unsigned int flags)\n+\t\t unsigned int flags)\n {\n \tsize_t obj_per_page, pg_num, pg_sz;\n \n+\tif (flags & (MEMPOOL_F_CAPA_BLK_ALIGNED_OBJECTS |\n+\t\t\tMEMPOOL_F_CAPA_PHYS_CONTIG))\n+\t\t/* alignment need one additional object */\n+\t\telt_num += 1;\n+\n \tif (total_elt_sz == 0)\n \t\treturn 0;\n \n@@ -265,13 +270,18 @@ rte_mempool_xmem_size(uint32_t elt_num, size_t total_elt_sz, uint32_t pg_shift,\n ssize_t\n rte_mempool_xmem_usage(__rte_unused void *vaddr, uint32_t elt_num,\n \tsize_t total_elt_sz, const phys_addr_t paddr[], uint32_t pg_num,\n-\tuint32_t pg_shift, __rte_unused unsigned int flags)\n+\tuint32_t pg_shift, unsigned int flags)\n {\n \tuint32_t elt_cnt = 0;\n \tphys_addr_t start, end;\n \tuint32_t paddr_idx;\n \tsize_t pg_sz = (size_t)1 << pg_shift;\n \n+\tif (flags & (MEMPOOL_F_CAPA_BLK_ALIGNED_OBJECTS |\n+\t\t\tMEMPOOL_F_CAPA_PHYS_CONTIG))\n+\t\t/* alignment need one additional object */\n+\t\telt_num += 1;\n+\n \t/* if paddr is NULL, assume contiguous memory */\n \tif (paddr == NULL) {\n \t\tstart = 0;\n@@ -390,7 +400,10 @@ rte_mempool_populate_phys(struct rte_mempool *mp, char *vaddr,\n \tmemhdr->free_cb = free_cb;\n \tmemhdr->opaque = opaque;\n \n-\tif (mp->flags & MEMPOOL_F_NO_CACHE_ALIGN)\n+\tif (mp->flags & MEMPOOL_F_CAPA_BLK_ALIGNED_OBJECTS)\n+\t\t/* align object start address to a multiple of total_elt_sz */\n+\t\toff = total_elt_sz - ((uintptr_t)vaddr % total_elt_sz);\n+\telse if (mp->flags & MEMPOOL_F_NO_CACHE_ALIGN)\n \t\toff = RTE_PTR_ALIGN_CEIL(vaddr, 8) - vaddr;\n \telse\n \t\toff = RTE_PTR_ALIGN_CEIL(vaddr, RTE_CACHE_LINE_SIZE) - vaddr;\ndiff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h\nindex 734392556..24195dda0 100644\n--- a/lib/librte_mempool/rte_mempool.h\n+++ b/lib/librte_mempool/rte_mempool.h\n@@ -271,6 +271,18 @@ struct rte_mempool {\n * Note: This flag should not be passed by application.\n */\n #define MEMPOOL_F_CAPA_PHYS_CONTIG 0x0040\n+/**\n+ * This capability flag is advertised by a mempool handler. Used for a case\n+ * where mempool driver wants object start address(vaddr) aligned to block\n+ * size(/ total element size).\n+ *\n+ * Note:\n+ * - This flag should not be passed by application.\n+ * Flag used for mempool driver only.\n+ * - Mempool driver must also set MEMPOOL_F_CAPA_PHYS_CONTIG flag along with\n+ * MEMPOOL_F_CAPA_BLK_ALIGNED_OBJECTS.\n+ */\n+#define MEMPOOL_F_CAPA_BLK_ALIGNED_OBJECTS 0x0080\n \n /**\n * @internal When debug is enabled, store some statistics.\n", "prefixes": [ "dpdk-dev", "v6", "7/8" ] }