From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 89E69A0534; Wed, 12 Feb 2020 13:06:58 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 6D3E9137D; Wed, 12 Feb 2020 13:06:57 +0100 (CET) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by dpdk.org (Postfix) with ESMTP id A06A9DE3 for ; Wed, 12 Feb 2020 13:06:55 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Feb 2020 04:06:54 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,428,1574150400"; d="scan'208";a="226776176" Received: from atrybulx-mobl.ger.corp.intel.com (HELO build-VirtualBox.imu.intel.com) ([10.103.102.205]) by fmsmga007.fm.intel.com with ESMTP; 12 Feb 2020 04:06:52 -0800 From: Artur Trybula To: dev@dpdk.org, fiona.trahe@intel.com, shallyv@marvell.com, adamx.dybkowski@intel.com, arturx.trybula@intel.com, akhil.goyal@nxp.com Date: Wed, 12 Feb 2020 13:06:49 +0100 Message-Id: <20200212120649.5080-1-arturx.trybula@intel.com> X-Mailer: git-send-email 2.17.1 Subject: [dpdk-dev] [PATCH] doc: updates for cycle-count mode in compression perf tool 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 commit adds release notes and updates documentation for the cycle-count mode added to the compression performance tool. Fixes: 2695db95a147 ("test/compress: add cycle-count mode to perf tool") Signed-off-by: Artur Trybula --- doc/guides/rel_notes/release_20_02.rst | 5 +++++ doc/guides/tools/comp_perf.rst | 16 +++++++++++++--- 2 files changed, 18 insertions(+), 3 deletions(-) diff --git a/doc/guides/rel_notes/release_20_02.rst b/doc/guides/rel_notes/release_20_02.rst index 786f9b119..2183a8aa8 100644 --- a/doc/guides/rel_notes/release_20_02.rst +++ b/doc/guides/rel_notes/release_20_02.rst @@ -188,6 +188,11 @@ New Features Add event device support for ``l3fwd`` sample application. It demonstrates usage of poll and event mode IO mechanism under a single application. +* **Added cycle-count mode to the compression performance tool.** + + Enhanced the compression performance tool by adding a cycle-count mode + which can be used to help measure and tune hardware and software PMDs. + Removed Items ------------- diff --git a/doc/guides/tools/comp_perf.rst b/doc/guides/tools/comp_perf.rst index 6c59c8403..ee585d102 100644 --- a/doc/guides/tools/comp_perf.rst +++ b/doc/guides/tools/comp_perf.rst @@ -14,8 +14,16 @@ which are passed to compress device with compression operations. Then, the output buffers are fed into the decompression stage, and the resulting data is compared against the original data (verification phase). After that, a number of iterations are performed, compressing first and decompressing later, -to check the throughput rate -(showing cycles/iteration, cycles/Byte and Gbps, for compression and decompression). +to check the throughput rate (showing cycles/iteration, cycles/Byte and Gbps, +for compression and decompression). +Another option: ``pmd-cyclecount``, gives the user the opportunity to measure +the number of cycles per operation for the 3 phases: setup, enqueue_burst and +dequeue_burst, for both compression and decompression. An optional delay can be +inserted between enqueue and dequeue so no cycles are wasted in retries while +waiting for a hardware device to finish. Although artificial, this allows +to measure the minimum offload cost which could be achieved in a perfectly +tuned system. Comparing the results of the two tests gives information about +the trade-off between throughput and cycle-count. .. Note:: @@ -56,7 +64,7 @@ See the DPDK Getting Started Guides for more information on these options. Application Options ~~~~~~~~~~~~~~~~~~~ - ``--ptest [benchmark/verify]``: set test type (default: benchmark) + ``--ptest [throughput/verify/pmd-cyclecount]``: set test type (default: throughput) ``--driver-name NAME``: compress driver to use @@ -84,6 +92,8 @@ Application Options ``--external-mbufs``: allocate and use memzones as external buffers instead of keeping the data directly in mbuf areas + ``--cc-delay-us N``: delay between enqueue and dequeue operations in microseconds, valid only for the cyclecount test (default: 500 us) + ``-h``: prints this help -- 2.17.1