From patchwork Fri Jan 31 07:28:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arkadiusz Kusztal X-Patchwork-Id: 65413 X-Patchwork-Delegate: gakhil@marvell.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 3787BA0524; Fri, 31 Jan 2020 08:29:07 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 148731BF0B; Fri, 31 Jan 2020 08:29:01 +0100 (CET) Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by dpdk.org (Postfix) with ESMTP id 1EAE91C0B9 for ; Fri, 31 Jan 2020 08:28:57 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Jan 2020 23:28:56 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,385,1574150400"; d="scan'208";a="278018682" Received: from akusztax-mobl.ger.corp.intel.com ([10.103.102.194]) by FMSMGA003.fm.intel.com with ESMTP; 30 Jan 2020 23:28:56 -0800 From: Arek Kusztal To: dev@dpdk.org Cc: akhil.goyal@nxp.com, fiona.trahe@intel.com, Arek Kusztal Date: Fri, 31 Jan 2020 08:28:48 +0100 Message-Id: <20200131072848.6748-2-arkadiuszx.kusztal@intel.com> X-Mailer: git-send-email 2.19.1.windows.1 In-Reply-To: <20200131072848.6748-1-arkadiuszx.kusztal@intel.com> References: <20200131072848.6748-1-arkadiuszx.kusztal@intel.com> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH] crypto/qat: fix not included release note for coalescing feature X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch fixes not included in original patch release note Fixes: 6cde900bd59d ("common/qat: remove tail write coalescing") Signed-off-by: Arek Kusztal Acked-by: Fiona Trahe --- doc/guides/rel_notes/release_20_02.rst | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/doc/guides/rel_notes/release_20_02.rst b/doc/guides/rel_notes/release_20_02.rst index d19a7f5..661969c 100644 --- a/doc/guides/rel_notes/release_20_02.rst +++ b/doc/guides/rel_notes/release_20_02.rst @@ -184,6 +184,15 @@ Removed Items the Technical Board decided to disable all the kernel modules by default from 20.02 version. +* **Removed coalescing feature from Intel QuickAssist Technology (QAT) PMD.** + + The internal tail write coalescing feature was removed as not compatible with + dual-thread feature. It was replaced with a threshold feature. At busy times + if only a small number of packets can be enqueued, each enqueue causes + an expensive MMIO write. These MMIO write occurrences can be optimised by using + the new threshold parameter on process start. Please see qat documentation for + more details. + API Changes -----------