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Mon, 2 Aug 2021 13:26:04 -0400 (EDT) From: Thomas Monjalon <thomas@monjalon.net> To: Ruifeng Wang <Ruifeng.Wang@arm.com>, Joyce Kong <Joyce.Kong@arm.com>, Dharmik Thakkar <Dharmik.Thakkar@arm.com>, Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com> Cc: "stephen@networkplumber.org" <stephen@networkplumber.org>, "mdr@ashroe.eu" <mdr@ashroe.eu>, "dev@dpdk.org" <dev@dpdk.org>, nd <nd@arm.com>, "stable@dpdk.org" <stable@dpdk.org> Date: Mon, 02 Aug 2021 19:26:03 +0200 Message-ID: <1675374.cPzSOG9ZiI@thomas> In-Reply-To: <DBAPR08MB58142A044873F3B11EBECEC098EF9@DBAPR08MB5814.eurprd08.prod.outlook.com> References: <20210712080237.19920-1-joyce.kong@arm.com> <2994487.6sU7YWgjxR@thomas> <DBAPR08MB58142A044873F3B11EBECEC098EF9@DBAPR08MB5814.eurprd08.prod.outlook.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Subject: Re: [dpdk-dev] [PATCH v2] doc: update atomic operation deprecation X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <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>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> 02/08/2021 19:22, Honnappa Nagarahalli: > From: Thomas Monjalon <thomas@monjalon.net> > > 23/07/2021 11:49, Joyce Kong: > > Considering all the questions regarding usage of atomics, I still think we need a > > documentation about their correct use. > > I think few things to document are: > 1) Use of __atomic_add_fetch vs __atomic_fetch_add > 2) Using __ATOMIC_RELAXED for statistics > 3) Using rte_atomic_thread_fence API That's a good list. Let's start with that please. I would like an explanation about when full barrier may be used.