From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 9392EA0547; Sun, 26 Sep 2021 08:33:36 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 71746410DB; Sun, 26 Sep 2021 08:33:34 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mails.dpdk.org (Postfix) with ESMTP id D6DD34003C for ; Sun, 26 Sep 2021 08:33:20 +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 638506D; Sat, 25 Sep 2021 23:33:20 -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 859FB3F59C; Sat, 25 Sep 2021 23:33:18 -0700 (PDT) From: Feifei Wang To: Konstantin Ananyev Cc: dev@dpdk.org, nd@arm.com, Feifei Wang , Ruifeng Wang Date: Sun, 26 Sep 2021 14:33:01 +0800 Message-Id: <20210926063302.1541193-5-feifei.wang2@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210926063302.1541193-1-feifei.wang2@arm.com> References: <20210902053253.3017858-1-feifei.wang2@arm.com> <20210926063302.1541193-1-feifei.wang2@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [RFC PATCH v3 4/5] lib/bpf: use wait event scheme for Rx/Tx iteration 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 cbi->use to be updated, use wait event scheme. Signed-off-by: Feifei Wang Reviewed-by: Ruifeng Wang --- lib/bpf/bpf_pkt.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/lib/bpf/bpf_pkt.c b/lib/bpf/bpf_pkt.c index 6e8248f0d6..3af15ae97b 100644 --- a/lib/bpf/bpf_pkt.c +++ b/lib/bpf/bpf_pkt.c @@ -113,7 +113,7 @@ bpf_eth_cbi_unuse(struct bpf_eth_cbi *cbi) static void bpf_eth_cbi_wait(const struct bpf_eth_cbi *cbi) { - uint32_t nuse, puse; + uint32_t puse; /* make sure all previous loads and stores are completed */ rte_smp_mb(); @@ -122,11 +122,8 @@ bpf_eth_cbi_wait(const struct bpf_eth_cbi *cbi) /* in use, busy wait till current RX/TX iteration is finished */ if ((puse & BPF_ETH_CBI_INUSE) != 0) { - do { - rte_pause(); - rte_compiler_barrier(); - nuse = cbi->use; - } while (nuse == puse); + rte_compiler_barrier(); + rte_wait_event_32(&cbi->use, UINT_MAX, puse, ==, __ATOMIC_RELAXED); } } -- 2.25.1