From patchwork Wed Aug 25 08:01:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Feifei Wang X-Patchwork-Id: 97311 X-Patchwork-Delegate: david.marchand@redhat.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 71D4EA0C53; Wed, 25 Aug 2021 10:01:58 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id C1395411D9; Wed, 25 Aug 2021 10:01:41 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mails.dpdk.org (Postfix) with ESMTP id 0DE6B411CE for ; Wed, 25 Aug 2021 10:01:40 +0200 (CEST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 859EF31B; Wed, 25 Aug 2021 01:01:39 -0700 (PDT) Received: from net-x86-dell-8268.shanghai.arm.com (net-x86-dell-8268.shanghai.arm.com [10.169.210.115]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id A7F173F66F; Wed, 25 Aug 2021 01:01:37 -0700 (PDT) From: Feifei Wang To: Honnappa Nagarahalli Cc: dev@dpdk.org, nd@arm.com, Feifei Wang , Ruifeng Wang Date: Wed, 25 Aug 2021 16:01:27 +0800 Message-Id: <20210825080127.495645-3-feifei.wang2@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210825080127.495645-1-feifei.wang2@arm.com> References: <20210825080127.495645-1-feifei.wang2@arm.com> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v1 2/2] mcslock: use wait until equal API for tight loop 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" Instead of polling for previous lock holder unlocking, use wait_until_equal API. Signed-off-by: Feifei Wang Reviewed-by: Ruifeng Wang --- lib/eal/include/generic/rte_mcslock.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/eal/include/generic/rte_mcslock.h b/lib/eal/include/generic/rte_mcslock.h index 9f323bd2a2..c99343f22c 100644 --- a/lib/eal/include/generic/rte_mcslock.h +++ b/lib/eal/include/generic/rte_mcslock.h @@ -84,8 +84,8 @@ rte_mcslock_lock(rte_mcslock_t **msl, rte_mcslock_t *me) * to spin on me->locked until the previous lock holder resets * the me->locked using mcslock_unlock(). */ - while (__atomic_load_n(&me->locked, __ATOMIC_ACQUIRE)) - rte_pause(); + rte_wait_until_equal_32((volatile uint32_t *)&me->locked, + 0, __ATOMIC_ACQUIRE); } /**