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GET /api/1.0/patches/15758/?format=api
{ "id": 15758, "url": "http://patchwork.dpdk.org/api/1.0/patches/15758/?format=api", "project": { "id": 1, "url": "http://patchwork.dpdk.org/api/1.0/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" }, "msgid": "<20160910135016.6468-2-vladyslav.buslov@harmonicinc.com>", "date": "2016-09-10T13:50:16", "name": "[dpdk-dev,v2,2/2] kni: add support for core_id param in single threaded mode", "commit_ref": null, "pull_url": null, "state": "changes-requested", "archived": true, "hash": "cd1c70f1e52f524aec7cc7432d62899f148f2d76", "submitter": { "id": 454, "url": "http://patchwork.dpdk.org/api/1.0/people/454/?format=api", "name": "Vladyslav Buslov", "email": "vladyslav.buslov@harmonicinc.com" }, "delegate": { "id": 319, "url": "http://patchwork.dpdk.org/api/1.0/users/319/?format=api", "username": "fyigit", "first_name": "Ferruh", "last_name": "Yigit", "email": "ferruh.yigit@amd.com" }, "mbox": "http://patchwork.dpdk.org/project/dpdk/patch/20160910135016.6468-2-vladyslav.buslov@harmonicinc.com/mbox/", "series": [], "check": "pending", "checks": "http://patchwork.dpdk.org/api/patches/15758/checks/", "tags": {}, "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 1B0E7378B;\n\tSat, 10 Sep 2016 15:50:59 +0200 (CEST)", "from NAM02-CY1-obe.outbound.protection.outlook.com\n\t(mail-cys01nam02on0067.outbound.protection.outlook.com\n\t[104.47.37.67]) by dpdk.org (Postfix) with ESMTP id E57E72BAC\n\tfor <dev@dpdk.org>; Sat, 10 Sep 2016 15:50:56 +0200 (CEST)", "from kms.harmonicinc.com (62.205.135.152) by\n\tMWHPR11MB1360.namprd11.prod.outlook.com (10.169.235.22) with\n\tMicrosoft SMTP Server (version=TLS1_0,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA_P384) id\n\t15.1.609.9; Sat, 10 Sep 2016 13:50:55 +0000" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=harmonic.onmicrosoft.com; s=selector1-harmonicinc-com;\n\th=From:Date:Subject:Message-ID:Content-Type:MIME-Version;\n\tbh=54JAlGkvwuAFWos4bI1pXnJVI3DAZdfQjUtZBqqyYzw=;\n\tb=G6GOTEGslE2kviG9JdkM5qMvRBOqG3C0+MCgFjPbSt4bq/5RjaB+nkY4EqenejFcotWRdSKMoep36GI8U0nY02K7fCcG8DjVXIyCim/E7buhExAhgVGtVqDQd15JfGR3wzLmfrO/rLbKCGhEyz6DOp40NpdmvCUShZ4hL6IkBto=", "Authentication-Results": "spf=none (sender IP is )\n\tsmtp.mailfrom=Vladyslav.Buslov@harmonicinc.com; ", "From": "Vladyslav Buslov <vladyslav.buslov@harmonicinc.com>", "To": "<dev@dpdk.org>", "Date": "Sat, 10 Sep 2016 16:50:16 +0300", "Message-ID": "<20160910135016.6468-2-vladyslav.buslov@harmonicinc.com>", "X-Mailer": "git-send-email 2.8.3", "In-Reply-To": "<20160910135016.6468-1-vladyslav.buslov@harmonicinc.com>", "References": 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"SFV:NSPM;\n\tSFS:(10009020)(4630300001)(6009001)(7916002)(189002)(199003)(47776003)(42186005)(92566002)(81166006)(7736002)(97736004)(586003)(2906002)(1076002)(81156014)(50226002)(105586002)(68736007)(2351001)(7846002)(107886002)(106356001)(189998001)(53416004)(305945005)(19580395003)(5660300001)(101416001)(2950100001)(36756003)(48376002)(5003940100001)(50466002)(110136002)(66066001)(76176999)(6116002)(8676002)(50986999)(3846002)(86362001)(69596002)(19580405001)(77096005)(33646002)(450100001)(229853001);\n\tDIR:OUT; SFP:1101; SCL:1; SRVR:MWHPR11MB1360; H:kms.harmonicinc.com;\n\tFPR:; \n\tSPF:None; PTR:InfoNoRecords; MX:1; A:1; LANG:en; ", "Received-SPF": "None (protection.outlook.com: harmonicinc.com does not\n\tdesignate permitted sender hosts)", "SpamDiagnosticOutput": "1:99", "SpamDiagnosticMetadata": "NSPM", "X-OriginatorOrg": "harmonicinc.com", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "10 Sep 2016 13:50:55.1937\n\t(UTC)", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "MWHPR11MB1360", "Subject": "[dpdk-dev] [PATCH v2 2/2] kni: add support for core_id param in\n\tsingle threaded mode", "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>,\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": "Allow binding KNI thread to specific core in single threaded mode\nby setting core_id and force_bind config parameters.\n\nSigned-off-by: Vladyslav Buslov <vladyslav.buslov@harmonicinc.com>\n---\n\nv2:\n* Fixed formatting.\n* Refactored kthread create/bind functionality into separate function.\n* Moved thread mode print into kni_init.\n* Added short description to KNI Programmer's Gude doc.\n* Fixed outdated mbuf processing description in KNI Programmer's Gude doc.\n\n doc/guides/prog_guide/kernel_nic_interface.rst | 5 +-\n lib/librte_eal/linuxapp/kni/kni_misc.c | 72 +++++++++++++++++---------\n 2 files changed, 51 insertions(+), 26 deletions(-)", "diff": "diff --git a/doc/guides/prog_guide/kernel_nic_interface.rst b/doc/guides/prog_guide/kernel_nic_interface.rst\nindex fac1960..0fdc307 100644\n--- a/doc/guides/prog_guide/kernel_nic_interface.rst\n+++ b/doc/guides/prog_guide/kernel_nic_interface.rst\n@@ -102,6 +102,9 @@ Refer to rte_kni_common.h in the DPDK source code for more details.\n \n The physical addresses will be re-mapped into the kernel address space and stored in separate KNI contexts.\n \n+The affinity of kernel RX thread (both single and multi-threaded modes) is controlled by force_bind and\n+core_id config parameters.\n+\n The KNI interfaces can be deleted by a DPDK application dynamically after being created.\n Furthermore, all those KNI interfaces not deleted will be deleted on the release operation\n of the miscellaneous device (when the DPDK application is closed).\n@@ -128,7 +131,7 @@ Use Case: Ingress\n On the DPDK RX side, the mbuf is allocated by the PMD in the RX thread context.\n This thread will enqueue the mbuf in the rx_q FIFO.\n The KNI thread will poll all KNI active devices for the rx_q.\n-If an mbuf is dequeued, it will be converted to a sk_buff and sent to the net stack via netif_rx().\n+If an mbuf is dequeued, it will be converted to a sk_buff and sent to the net stack via netif_rx_ni().\n The dequeued mbuf must be freed, so the same pointer is sent back in the free_q FIFO.\n \n The RX thread, in the same main loop, polls this FIFO and frees the mbuf after dequeuing it.\ndiff --git a/lib/librte_eal/linuxapp/kni/kni_misc.c b/lib/librte_eal/linuxapp/kni/kni_misc.c\nindex 5e7cf21..c79f5a8 100644\n--- a/lib/librte_eal/linuxapp/kni/kni_misc.c\n+++ b/lib/librte_eal/linuxapp/kni/kni_misc.c\n@@ -172,6 +172,11 @@ kni_init(void)\n \t\treturn -EINVAL;\n \t}\n \n+\tif (multiple_kthread_on == 0)\n+\t\tKNI_PRINT(\"Single kernel thread for all KNI devices\\n\");\n+\telse\n+\t\tKNI_PRINT(\"Multiple kernel thread mode enabled\\n\");\n+\n #ifdef HAVE_SIMPLIFIED_PERNET_OPERATIONS\n \trc = register_pernet_subsys(&kni_net_ops);\n #else\n@@ -240,12 +245,6 @@ kni_open(struct inode *inode, struct file *file)\n \tif (test_and_set_bit(KNI_DEV_IN_USE_BIT_NUM, &knet->device_in_use))\n \t\treturn -EBUSY;\n \n-\t/* Create kernel thread for single mode */\n-\tif (multiple_kthread_on == 0)\n-\t\tKNI_PRINT(\"Single kernel thread for all KNI devices\\n\");\n-\telse\n-\t\tKNI_PRINT(\"Multiple kernel thread mode enabled\\n\");\n-\n \tfile->private_data = get_net(net);\n \tKNI_PRINT(\"/dev/kni opened\\n\");\n \n@@ -391,6 +390,32 @@ kni_check_param(struct kni_dev *kni, struct rte_kni_device_info *dev)\n \treturn 0;\n }\n \n+__printf(5, 6) static struct task_struct *\n+kni_run_thread(int (*threadfn)(void *data),\n+\tvoid *data,\n+\tuint8_t force_bind,\n+\tunsigned core_id,\n+\tconst char namefmt[], ...)\n+{\n+\tstruct task_struct *kni_thread = NULL;\n+\tchar task_comm[TASK_COMM_LEN];\n+\tva_list args;\n+\n+\tva_start(args, namefmt);\n+\tvsnprintf(task_comm, sizeof(task_comm), namefmt, args);\n+\tva_end(args);\n+\n+\tkni_thread = kthread_create(threadfn, data, task_comm);\n+\tif (IS_ERR(kni_thread))\n+\t\treturn NULL;\n+\n+\tif (force_bind)\n+\t\tkthread_bind(kni_thread, core_id);\n+\twake_up_process(kni_thread);\n+\n+\treturn kni_thread;\n+}\n+\n static int\n kni_ioctl_create(struct net *net,\n \t\tunsigned int ioctl_num, unsigned long ioctl_param)\n@@ -419,8 +444,7 @@ kni_ioctl_create(struct net *net,\n \t/**\n \t * Check if the cpu core id is valid for binding.\n \t */\n-\tif (dev_info.force_bind &&\n-\t\t\t\t!cpu_online(dev_info.core_id)) {\n+\tif (dev_info.force_bind && !cpu_online(dev_info.core_id)) {\n \t\tKNI_ERR(\"cpu %u is not online\\n\", dev_info.core_id);\n \t\treturn -EINVAL;\n \t}\n@@ -572,31 +596,29 @@ kni_ioctl_create(struct net *net,\n \t * and finally wake it up.\n \t */\n \tif (multiple_kthread_on) {\n-\t\tkni->pthread = kthread_create(kni_thread_multiple,\n-\t\t\t\t\t (void *)kni,\n-\t\t\t\t\t \"kni_%s\", kni->name);\n-\t\tif (IS_ERR(kni->pthread)) {\n+\t\tkni->pthread = kni_run_thread(kni_thread_multiple,\n+\t\t\t(void *)kni,\n+\t\t\tdev_info.force_bind,\n+\t\t\tkni->core_id,\n+\t\t\t\"kni_%s\", kni->name);\n+\t\tif (kni->pthread == NULL) {\n \t\t\tkni_dev_remove(kni);\n \t\t\treturn -ECANCELED;\n \t\t}\n-\t\tif (dev_info.force_bind)\n-\t\t\tkthread_bind(kni->pthread, kni->core_id);\n-\t\twake_up_process(kni->pthread);\n \t} else {\n \t\tmutex_lock(&knet->kni_kthread_lock);\n \t\tif (knet->kni_kthread == NULL) {\n-\t\t\tknet->kni_kthread = kthread_create(kni_thread_single,\n-\t\t\t\t\t\t\t\t\t(void *)knet,\n-\t\t\t\t\t\t\t\t\t\"kni_single\");\n-\t\t\tif (IS_ERR(knet->kni_kthread)) {\n-\t\t\t\tkni_dev_remove(kni);\n-\t\t\t\treturn -ECANCELED;\n-\t\t\t}\n-\t\t\tif (dev_info.force_bind)\n-\t\t\t\tkthread_bind(knet->kni_kthread, kni->core_id);\n-\t\t\twake_up_process(knet->kni_kthread);\n+\t\t\tknet->kni_kthread = kni_run_thread(kni_thread_single,\n+\t\t\t\t(void *)knet,\n+\t\t\t\tdev_info.force_bind,\n+\t\t\t\tkni->core_id,\n+\t\t\t\t\"kni_single\");\n \t\t}\n \t\tmutex_unlock(&knet->kni_kthread_lock);\n+\t\tif (knet->kni_kthread == NULL) {\n+\t\t\tkni_dev_remove(kni);\n+\t\t\treturn -ECANCELED;\n+\t\t}\n \t}\n \n \tdown_write(&knet->kni_list_lock);\n", "prefixes": [ "dpdk-dev", "v2", "2/2" ] }