From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1FE1C433EF for ; Wed, 13 Oct 2021 18:54:34 +0000 (UTC) Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by mail.kernel.org (Postfix) with ESMTP id 979096008E for ; Wed, 13 Oct 2021 18:54:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 979096008E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=dpdk.org Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id C45504121C; Wed, 13 Oct 2021 20:54:24 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mails.dpdk.org (Postfix) with ESMTP id 56E31411FA for ; Wed, 13 Oct 2021 20:54:21 +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 CF2DF1480; Wed, 13 Oct 2021 11:54:20 -0700 (PDT) Received: from 2p2660v4-1.austin.arm.com (2p2660v4-1.austin.arm.com [10.118.13.211]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C89623F70D; Wed, 13 Oct 2021 11:54:20 -0700 (PDT) From: Dharmik Thakkar To: Anatoly Burakov Cc: dev@dpdk.org, nd@arm.com, honnappa.nagarahalli@arm.com, ruifeng.wang@arm.com, joyce.kong@arm.com, dharmik.thakkar@arm.com Date: Wed, 13 Oct 2021 13:54:01 -0500 Message-Id: <20211013185407.2841183-3-dharmik.thakkar@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211013185407.2841183-1-dharmik.thakkar@arm.com> References: <20210823054952.15001-1-joyce.kong@arm.com> <20211013185407.2841183-1-dharmik.thakkar@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v3 2/8] examples/multi_process: use compiler atomics for sync 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" From: Joyce Kong Convert rte_atomic32_test_and_set usage to compiler atomic CAS operation for display_stats sync. Signed-off-by: Joyce Kong Reviewed-by: Ruifeng Wang --- examples/multi_process/client_server_mp/mp_server/main.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/examples/multi_process/client_server_mp/mp_server/main.c b/examples/multi_process/client_server_mp/mp_server/main.c index 9bcee460fd24..b4761ebc7b05 100644 --- a/examples/multi_process/client_server_mp/mp_server/main.c +++ b/examples/multi_process/client_server_mp/mp_server/main.c @@ -20,7 +20,6 @@ #include #include #include -#include #include #include #include @@ -158,10 +157,12 @@ static int sleep_lcore(__rte_unused void *dummy) { /* Used to pick a display thread - static, so zero-initialised */ - static rte_atomic32_t display_stats; + static uint32_t display_stats; + uint32_t status = 0; /* Only one core should display stats */ - if (rte_atomic32_test_and_set(&display_stats)) { + if (__atomic_compare_exchange_n(&display_stats, &status, 1, 0, + __ATOMIC_RELAXED, __ATOMIC_RELAXED)) { const unsigned sleeptime = 1; printf("Core %u displaying statistics\n", rte_lcore_id()); -- 2.25.1