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GET /api/patches/49945/?format=api
{ "id": 49945, "url": "https://patches.dpdk.org/api/patches/49945/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/patch/20190118102930.27487-2-shshaikh@marvell.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": "<20190118102930.27487-2-shshaikh@marvell.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20190118102930.27487-2-shshaikh@marvell.com", "date": "2019-01-18T10:29:30", "name": "[2/2] net/qede: fix prefetch from incorrect place in Tx path", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": true, "hash": "f99292890b4fabedb20ca0531f72696137ebadc3", "submitter": { "id": 1210, "url": "https://patches.dpdk.org/api/people/1210/?format=api", "name": "Shahed Shaikh", "email": "shshaikh@marvell.com" }, "delegate": { "id": 319, "url": "https://patches.dpdk.org/api/users/319/?format=api", "username": "fyigit", "first_name": "Ferruh", "last_name": "Yigit", "email": "ferruh.yigit@amd.com" }, "mbox": "https://patches.dpdk.org/project/dpdk/patch/20190118102930.27487-2-shshaikh@marvell.com/mbox/", "series": [ { "id": 3258, "url": "https://patches.dpdk.org/api/series/3258/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/list/?series=3258", "date": "2019-01-18T10:29:29", "name": "[1/2] net/qede: fix performance bottleneck in Rx path", "version": 1, "mbox": "https://patches.dpdk.org/series/3258/mbox/" } ], "comments": "https://patches.dpdk.org/api/patches/49945/comments/", "check": "success", "checks": "https://patches.dpdk.org/api/patches/49945/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 [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id A9C822BCE;\n\tFri, 18 Jan 2019 11:29:40 +0100 (CET)", "from NAM01-BY2-obe.outbound.protection.outlook.com\n\t(mail-eopbgr810040.outbound.protection.outlook.com [40.107.81.40])\n\tby dpdk.org (Postfix) with ESMTP id 8F8F92BAA;\n\tFri, 18 Jan 2019 11:29:38 +0100 (CET)", "from DM5PR07CA0105.namprd07.prod.outlook.com (2603:10b6:4:ae::34)\n\tby\n\tSN6PR07MB4383.namprd07.prod.outlook.com (2603:10b6:805:58::14) with\n\tMicrosoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id\n\t15.20.1537.26; Fri, 18 Jan 2019 10:29:37 +0000", "from BY2NAM05FT020.eop-nam05.prod.protection.outlook.com\n\t(2a01:111:f400:7e52::205) by DM5PR07CA0105.outlook.office365.com\n\t(2603:10b6:4:ae::34) with Microsoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.1537.27 via\n\tFrontend Transport; Fri, 18 Jan 2019 10:29:36 +0000", "from CAEXCH02.caveonetworks.com (199.233.58.38) by\n\tBY2NAM05FT020.mail.protection.outlook.com (10.152.100.157) with\n\tMicrosoft SMTP Server (version=TLS1_0,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA) id\n\t15.20.1558.9 via Frontend Transport; Fri, 18 Jan 2019 10:29:36 +0000", "from dut1171.mv.qlogic.com (10.112.88.18) by\n\tCAEXCH02.caveonetworks.com (10.67.98.110) with Microsoft SMTP Server\n\t(TLS) id 14.2.347.0; Fri, 18 Jan 2019 02:29:36 -0800", "from dut1171.mv.qlogic.com (localhost [127.0.0.1])\tby\n\tdut1171.mv.qlogic.com (8.14.7/8.14.7) with ESMTP id x0IATZmf027528;\n\tFri, 18 Jan 2019 02:29:35 -0800", "(from root@localhost)\tby dut1171.mv.qlogic.com\n\t(8.14.7/8.14.7/Submit) id x0IATZtx027527;\n\tFri, 18 Jan 2019 02:29:35 -0800" ], "Authentication-Results": "spf=fail (sender IP is 199.233.58.38)\n\tsmtp.mailfrom=marvell.com; dpdk.org; dkim=none (message not signed)\n\theader.d=none; dpdk.org;\n\tdmarc=fail action=none header.from=marvell.com; ", "Received-SPF": "Fail (protection.outlook.com: domain of marvell.com does not\n\tdesignate 199.233.58.38 as permitted sender)\n\treceiver=protection.outlook.com; \n\tclient-ip=199.233.58.38; helo=CAEXCH02.caveonetworks.com;", "From": "Shahed Shaikh <shshaikh@marvell.com>", "To": "<dev@dpdk.org>", "CC": "<ferruh.yigit@intel.com>, <stable@dpdk.org>", "Date": "Fri, 18 Jan 2019 02:29:30 -0800", "Message-ID": "<20190118102930.27487-2-shshaikh@marvell.com>", "X-Mailer": "git-send-email 2.12.0", "In-Reply-To": "<20190118102930.27487-1-shshaikh@marvell.com>", "References": "<20190118102930.27487-1-shshaikh@marvell.com>", "MIME-Version": "1.0", "Content-Type": "text/plain", "X-EOPAttributedMessage": "0", "X-Matching-Connectors": "131922809766628892;\n\t(abac79dc-c90b-41ba-8033-08d666125e47);\n\t(abac79dc-c90b-41ba-8033-08d666125e47)", "X-Forefront-Antispam-Report": "CIP:199.233.58.38; 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PCL:0;\n\tRULEID:(2390118)(7020095)(5600109)(711020)(2017052603328);\n\tSRVR:SN6PR07MB4383; ", "X-MS-TrafficTypeDiagnostic": "SN6PR07MB4383:", "X-Microsoft-Antispam-PRVS": "<SN6PR07MB4383E12BB76AB6ED459166E0D39C0@SN6PR07MB4383.namprd07.prod.outlook.com>", "X-Forefront-PRVS": "0921D55E4F", "X-Microsoft-Antispam-Message-Info": "9PuLD9Mn8c7byeTTPld25ZQItQBm2OoTOVJtxFWTQUJPrKemN7IIHzTghWmU5ySGe9sGidjNK5L5lOzXdRb0/Qnmu3xhMtqQXGWONDr5Iqr7HU1A9KExZU+Yp1yJX2Vso6vks9G7E2pt+8S/9bdPkOWIaDbhzDWv59s2tK31og7OsPIdWAM4sKuOMTIYWc/xGIQlIDyVvmRfj2YgEMv74LZcGFkej2N2F6QPOGlSvqNi3SAS4Ygk5KthnU06YCa05lDU65zVBBcfJP529yaLncD5zGLZuP1k2mFBHUMhcp2Ai42Gky/KdQge/7D8weaTYxo1P/PW+Kgg7XHDRgvId8VO13saxeQOzK6gyptaBl+RY2gJftqH1ZlfC612HxHZX1y24OqFSuqGaj1YiH1F1H1hJ1gcWKuFVGnnCR6UGpE=", "SpamDiagnosticOutput": "1:99", "SpamDiagnosticMetadata": "NSPM", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "18 Jan 2019 10:29:36.3347\n\t(UTC)", "X-MS-Exchange-CrossTenant-Network-Message-Id": "7dd807a9-3075-4ab4-0003-08d67d2fd852", "X-MS-Exchange-CrossTenant-Id": "5afe0b00-7697-4969-b663-5eab37d5f47e", "X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp": "TenantId=5afe0b00-7697-4969-b663-5eab37d5f47e;\n\tIp=[199.233.58.38]; \n\tHelo=[CAEXCH02.caveonetworks.com]", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "SN6PR07MB4383", "Subject": "[dpdk-dev] [PATCH 2/2] net/qede: fix prefetch from incorrect place\n\tin Tx path", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Incorrect placement of prefetch in Tx path is causing\na performance drop of around ~2% on AMD platform.\n\nFixes: 2ea6f76aff40 (\"qede: add core driver\")\nCc: stable@dpdk.org\n\nSigned-off-by: Shahed Shaikh <shshaikh@marvell.com>\n---\n drivers/net/qede/qede_rxtx.c | 1 -\n 1 file changed, 1 deletion(-)", "diff": "diff --git a/drivers/net/qede/qede_rxtx.c b/drivers/net/qede/qede_rxtx.c\nindex 684c4ae..eda19b2 100644\n--- a/drivers/net/qede/qede_rxtx.c\n+++ b/drivers/net/qede/qede_rxtx.c\n@@ -2181,7 +2181,6 @@ qede_xmit_pkts(void *p_txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)\n \n \t\ttxq->nb_tx_avail -= bd1->data.nbds;\n \t\ttxq->sw_tx_prod++;\n-\t\trte_prefetch0(txq->sw_tx_ring[TX_PROD(txq)].mbuf);\n \t\tbd_prod =\n \t\t rte_cpu_to_le_16(ecore_chain_get_prod_idx(&txq->tx_pbl));\n #ifdef RTE_LIBRTE_QEDE_DEBUG_TX\n", "prefixes": [ "2/2" ] }