From patchwork Thu Aug 19 07:09:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joyce Kong X-Patchwork-Id: 97106 X-Patchwork-Delegate: thomas@monjalon.net 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 5E61AA0C47; Thu, 19 Aug 2021 09:10:24 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 5DF2D41204; Thu, 19 Aug 2021 09:09:48 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mails.dpdk.org (Postfix) with ESMTP id A3E3E41238 for ; Thu, 19 Aug 2021 09:09:46 +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 25113101E; Thu, 19 Aug 2021 00:09:46 -0700 (PDT) Received: from net-arm-n1sdp.shanghai.arm.com (net-arm-n1sdp.shanghai.arm.com [10.169.208.222]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7FC4F3F40C; Thu, 19 Aug 2021 00:09:43 -0700 (PDT) From: Joyce Kong To: Byron Marohn , Yipeng Wang Cc: dev@dpdk.org, thomas@monjalon.net, david.marchand@redhat.com, honnappa.nagarahalli@arm.com, ruifeng.wang@arm.com, nd@arm.com Date: Thu, 19 Aug 2021 02:09:07 -0500 Message-Id: <20210819070908.25773-8-joyce.kong@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210819070908.25773-1-joyce.kong@arm.com> References: <20210819070908.25773-1-joyce.kong@arm.com> Subject: [dpdk-dev] [PATCH v1 7/8] examples/server_node_efd: 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" Convert rte_atomic32_test_and_set to compiler CAS atomic operation for display_stats sync. Signed-off-by: Joyce Kong Reviewed-by: Ruifeng Wang --- examples/server_node_efd/server/main.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/examples/server_node_efd/server/main.c b/examples/server_node_efd/server/main.c index 7d07131dbf..b69beb012c 100644 --- a/examples/server_node_efd/server/main.c +++ b/examples/server_node_efd/server/main.c @@ -22,7 +22,6 @@ #include #include #include -#include #include #include #include @@ -180,10 +179,12 @@ 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; /* Only one core should display stats */ - if (rte_atomic32_test_and_set(&display_stats)) { + uint32_t display_init = 0; + if (__atomic_compare_exchange_n(&display_stats, &display_init, 1, 0, + __ATOMIC_RELAXED, __ATOMIC_RELAXED)) { const unsigned int sleeptime = 1; printf("Core %u displaying statistics\n", rte_lcore_id());