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 8DD15A0613 for ; Mon, 26 Aug 2019 18:46:08 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 9909A1BE9B; Mon, 26 Aug 2019 18:46:07 +0200 (CEST) Received: from qrelay157.mxroute.com (qrelay157.mxroute.com [172.82.139.157]) by dpdk.org (Postfix) with ESMTP id 89AA81BE92 for ; Mon, 26 Aug 2019 18:46:05 +0200 (CEST) Received: from filter002.mxroute.com (unknown [116.203.155.46]) by qrelay157.mxroute.com (Postfix) with ESMTP id B640E140850; Mon, 26 Aug 2019 12:46:04 -0400 (EDT) Received: from galaxy.mxroute.com (unknown [23.92.70.113]) by filter002.mxroute.com (Postfix) with ESMTPS id D34643F342; Mon, 26 Aug 2019 16:45:58 +0000 (UTC) Received: from [192.198.151.44] by galaxy.mxroute.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.91) (envelope-from ) id 1i2I1Y-0001Ij-W5; Mon, 26 Aug 2019 12:39:21 -0400 To: Aaron Conole Cc: dev@dpdk.org, bruce.richardson@intel.com, vladimir.medvedkin@intel.com, john.mcnamara@intel.com, marko.kovacevic@intel.com References: <20190822160717.13584-1-mdr@ashroe.eu> From: Ray Kinsella Openpgp: preference=signencrypt Autocrypt: addr=mdr@ashroe.eu; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-AuthUser: mdr@ashroe.eu Subject: Re: [dpdk-dev] [PATCH v2 0/2] add abi version testing to app/test 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" On 23/08/2019 16:49, Aaron Conole wrote: > Ray Kinsella writes: > >> This patchset adds ABI version testing to the app/test unit test framework, >> addressing two issues previously raised during ML conversations on ABI >> stability; >> >> 1. How do we unit test still supported previous ABI versions? >> 2. How to we unit test inline functions from still supported previous ABI >> versions? >> >> Starting with rte_lpm, I did the following:- >> >> * I reproduced mostly unmodified unit tests for the v2.0 ABI, taken from DPDK >> 2.2 and 17.02. >> * I reproduced the rte_lpm interface header from v2.0, including the inline >> functions and remapping symbols to their appropriate versions. >> * I added support for multiple abi versions to the app/test unit test framework >> to allow users to switch between abi versions (set_abi_version), without >> further polluting the already long list of unit tests available in app/test. >> >> The intention here is that in future as developers need to deprecate APIs, the >> associated unit tests may move into the ABI version testing mechanism of the >> app/test instead of being replaced by the latest set of unit tests as would be >> the case today. >> >> v2: >> >> * Added LPM IPv6 test cases for the v2.0 ABI. >> * Fixed a number of checkpatch errors, stop short of substantially reworking >> the test code from the v2.0 ABI. >> * Removed duplicating test cases published in the original v1 patch. > > Thanks for this work. I think it's useful. > > I see an error under aarch64 builds because there are some x86_64 > specific types being used in the testing. So the problem is that LPM didn't fully support ARM until DPDK v16.04. The ABI versioning code in the LPM library is there to support the 2.0 ABI. The intention of this unit test is to test backward's compatibility with an inline LPM function from DPDK v2.2.0, which was essentially x86 only at that time. Unless we want to get into the business of backporting ARM support to DPDK 2.2.0 (from where this test cases came from) - we should probably restrict these ABI versioning test cases to CONFIG_RTE_ARCH_X86_64 only. The other option is forget about testing this the LPM ABI versioning support, which then asks the question should be perhaps excise that code altogether. Make sense? Ray K