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GET /api/patches/82012/?format=api
{ "id": 82012, "url": "http://patches.dpdk.org/api/patches/82012/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/20201023202200.1909832-3-jesse.brandeburg@intel.com/", "project": { "id": 1, "url": "http://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": "<20201023202200.1909832-3-jesse.brandeburg@intel.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20201023202200.1909832-3-jesse.brandeburg@intel.com", "date": "2020-10-23T20:22:00", "name": "[v2,2/2] ice: update writeback policy to reduce latency", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": true, "hash": "dc8f49238c44a02c20e7416322e2ac07cf885475", "submitter": { "id": 364, "url": "http://patches.dpdk.org/api/people/364/?format=api", "name": "Jesse Brandeburg", "email": "jesse.brandeburg@intel.com" }, "delegate": { "id": 1540, "url": "http://patches.dpdk.org/api/users/1540/?format=api", "username": "qzhan15", "first_name": "Qi", "last_name": "Zhang", "email": "qi.z.zhang@intel.com" }, "mbox": "http://patches.dpdk.org/project/dpdk/patch/20201023202200.1909832-3-jesse.brandeburg@intel.com/mbox/", "series": [ { "id": 13286, "url": "http://patches.dpdk.org/api/series/13286/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=13286", "date": "2020-10-23T20:21:58", "name": "intel: fix writeback", "version": 2, "mbox": "http://patches.dpdk.org/series/13286/mbox/" } ], "comments": "http://patches.dpdk.org/api/patches/82012/comments/", "check": "success", "checks": "http://patches.dpdk.org/api/patches/82012/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@inbox.dpdk.org", "Delivered-To": "patchwork@inbox.dpdk.org", "Received": [ "from dpdk.org (dpdk.org [92.243.14.124])\n\tby inbox.dpdk.org (Postfix) with ESMTP id A8292A04DD;\n\tFri, 23 Oct 2020 22:22:43 +0200 (CEST)", "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id 5333A5AB4;\n\tFri, 23 Oct 2020 22:22:16 +0200 (CEST)", "from mga01.intel.com (mga01.intel.com [192.55.52.88])\n by dpdk.org (Postfix) with ESMTP id 101195AA2\n for <dev@dpdk.org>; Fri, 23 Oct 2020 22:22:11 +0200 (CEST)", "from fmsmga001.fm.intel.com ([10.253.24.23])\n by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 23 Oct 2020 13:22:08 -0700", "from jbrandeb-desk.jf.intel.com ([10.166.244.152])\n by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 23 Oct 2020 13:22:08 -0700" ], "IronPort-SDR": [ "\n Y+Z7FZ0GvqxDcBrKrW+QvllSqez2tEJruhh5OytAfCq/X2U6PBmOZulh78GLLjT79QXOOOyvys\n RTzxmk9aChYQ==", "\n dMjBT2m4y8nGo44O5Adcgd8ftxDqF9jgaJlAV5JC0Y7CiZ6njV1+1WdCAy32ezT7CqvRsYkaTh\n nveN6yGOc5hA==" ], "X-IronPort-AV": [ "E=McAfee;i=\"6000,8403,9783\"; a=\"185434294\"", "E=Sophos;i=\"5.77,409,1596524400\"; d=\"scan'208\";a=\"185434294\"", "E=Sophos;i=\"5.77,409,1596524400\"; d=\"scan'208\";a=\"423518850\"" ], "X-Amp-Result": "SKIPPED(no attachment in message)", "X-Amp-File-Uploaded": "False", "From": "Jesse Brandeburg <jesse.brandeburg@intel.com>", "To": "brian.johnson@intel.com,\n\tthomas@monjalon.net,\n\tdavid.marchand@redhat.com", "Cc": "Jesse Brandeburg <jesse.brandeburg@intel.com>, dev@dpdk.org,\n qi.z.zhang@intel.com", "Date": "Fri, 23 Oct 2020 13:22:00 -0700", "Message-Id": "<20201023202200.1909832-3-jesse.brandeburg@intel.com>", "X-Mailer": "git-send-email 2.25.4", "In-Reply-To": "<20201023202200.1909832-1-jesse.brandeburg@intel.com>", "References": "<20201023202200.1909832-1-jesse.brandeburg@intel.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[dpdk-dev] [PATCH v2 2/2] ice: update writeback policy to reduce\n\tlatency", "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 <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 <mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Just like iavf, setting the value to 2us allows for generally good\nstreaming packet performance while keeping latency down, and\ngenerally keeps the performance of the PF and VF interfaces similar.\n\nThe previous value of 0x10 was making latency on a single packet\nreceive be as much as 16us.\n\nFixes: 65dfc889d86b (\"net/ice: support Rx queue interruption\")\n\nReported-by: Brian Johnson <brian.johnson@intel.com>\nSigned-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>\n---\n drivers/net/ice/ice_ethdev.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c\nindex c65125ff3260..0df491f93126 100644\n--- a/drivers/net/ice/ice_ethdev.c\n+++ b/drivers/net/ice/ice_ethdev.c\n@@ -3345,7 +3345,7 @@ __vsi_queues_bind_intr(struct ice_vsi *vsi, uint16_t msix_vect,\n \t\tPMD_DRV_LOG(INFO, \"queue %d is binding to vect %d\",\n \t\t\t base_queue + i, msix_vect);\n \t\t/* set ITR0 value */\n-\t\tICE_WRITE_REG(hw, GLINT_ITR(0, msix_vect), 0x10);\n+\t\tICE_WRITE_REG(hw, GLINT_ITR(0, msix_vect), 0x2);\n \t\tICE_WRITE_REG(hw, QINT_RQCTL(base_queue + i), val);\n \t\tICE_WRITE_REG(hw, QINT_TQCTL(base_queue + i), val_tx);\n \t}\n", "prefixes": [ "v2", "2/2" ] }