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Thu, 17 Jun 2021 23:26:00 +0000 Received: from DBAPR08MB5814.eurprd08.prod.outlook.com ([fe80::f15f:821c:74c5:2482]) by DBAPR08MB5814.eurprd08.prod.outlook.com ([fe80::f15f:821c:74c5:2482%2]) with mapi id 15.20.4242.019; Thu, 17 Jun 2021 23:26:00 +0000 From: Honnappa Nagarahalli To: Tyler Retzlaff , Joyce Kong CC: "thomas@monjalon.net" , "david.marchand@redhat.com" , "stephen@networkplumber.org" , "olivier.matz@6wind.com" , "andrew.rybchenko@oktetlabs.ru" , "harry.van.haaren@intel.com" , Ruifeng Wang , "dev@dpdk.org" , nd , Honnappa Nagarahalli , "techboard@dpdk.org" , nd Thread-Topic: [dpdk-dev] [PATCH v2 0/8] use GCC's C11 atomic builtins for test Thread-Index: AQHXYlsX55q9L1IEsEyhls7s9yhriasYVEyAgACD8EA= Date: Thu, 17 Jun 2021 23:26:00 +0000 Message-ID: References: <20210604094624.31308-1-joyce.kong@arm.com> <20210616025459.22717-1-joyce.kong@arm.com> <20210617152155.GD29777@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net> In-Reply-To: <20210617152155.GD29777@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ts-tracking-id: 8C5979CABAB7334BBB4A133F117947E4.0 x-checkrecipientchecked: true Authentication-Results-Original: linux.microsoft.com; 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CTRY:IE; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:64aa7808-outbound-1.mta.getcheckrecipient.com; PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com; CAT:NONE; SFS:(4636009)(39850400004)(346002)(136003)(376002)(396003)(36840700001)(46966006)(7696005)(55016002)(81166007)(110136005)(8676002)(478600001)(86362001)(82310400003)(966005)(8936002)(6636002)(356005)(33656002)(9686003)(47076005)(82740400003)(5660300002)(36860700001)(450100002)(2906002)(26005)(336012)(186003)(4326008)(52536014)(83380400001)(70206006)(54906003)(6506007)(316002)(70586007)(21314003); DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jun 2021 23:26:12.5188 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 738fa2cd-99f4-4574-f39e-08d931e74b9a X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB5EUR03FT040.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR08MB3601 Subject: Re: [dpdk-dev] [PATCH v2 0/8] use GCC's C11 atomic builtins for test X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 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" >=20 > On Tue, Jun 15, 2021 at 09:54:51PM -0500, Joyce Kong wrote: > > Since C11 memory model is adopted in DPDK now[1], use GCC's atomic > > builtins in test cases. >=20 > as previously discussed these atomics are not "C11" they are direct use o= f gcc > builtins. please don't incorporate C11 into the title of the patches or c= ommit > messages since it isn't. GCC supports 2 types of built-in atomics, __atomic_xxx[1] and __sync_xxx [2= ]. We need a way to distinguish between them. We are using "C11" as [1] say= s they match C++11 memory model. [1] https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html [2] https://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html >=20 > please do not integrate a patch that directly uses gcc builtins and exten= sions > please maintain abstractions under the rte_ namespace. This is just another wrapper which is not required according to the current= requirements we are working with. > specifically this patch substantially increases coupling to a single comp= iler > implementation reducing portability. >=20 > as previously requested, please establish at a minimum macros in the rte_ > namespace for this. This needs to be discussed at the Techboard. I have CCed the Techboard. The= Techboard meets once in 2 weeks. The details are at [3]. Next meeting is o= n 6/30 at 10am CST. Can you please attend and make your case? Alternately, you can send an email to techboard@dpdk.org explaining your ca= se and we will debate and make a decision. [3] https://core.dpdk.org/techboard/ >=20 > thanks. >=20 > > > > [1] > > https://www.dpdk.org/blog/2021/03/26/dpdk-adopts-the-c11-memory- > model/ > > > > v2: > > Use rte_wait_until_equal() instead of original sync loops. > > > > > > v1: > > The initial version. > > > > Joyce Kong (8): > > test/ticketlock: use GCC atomic builtins for lcores sync > > test/spinlock: use GCC atomic builtins for lcores sync > > test/rwlock: use GCC atomic builtins for lcores sync > > test/mcslock: use GCC atomic builtins for lcores sync > > test/mempool: remove unused variable for lcores sync > > test/mempool_perf: use GCC atomic builtins for lcores sync > > test/service_cores: use GCC atomic builtins for lock sync > > test/rcu: use GCC atomic builtins for data sync > > > > app/test/test_mcslock.c | 14 +++-- > > app/test/test_mempool.c | 5 -- > > app/test/test_mempool_perf.c | 11 ++-- > > app/test/test_rcu_qsbr_perf.c | 98 +++++++++++++++++------------------ > > app/test/test_rwlock.c | 10 ++-- > > app/test/test_service_cores.c | 36 +++++++------ > > app/test/test_spinlock.c | 9 ++-- > > app/test/test_ticketlock.c | 10 ++-- > > 8 files changed, 91 insertions(+), 102 deletions(-) > > > > -- > > 2.17.1