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 X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9F3BAC4CECB for ; Thu, 12 Sep 2019 11:27:23 +0000 (UTC) Received: from dpdk.org (dpdk.org [92.243.14.124]) by mail.kernel.org (Postfix) with ESMTP id 6103C2067D for ; Thu, 12 Sep 2019 11:27:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6103C2067D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=dev-bounces@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 5F02C1E9C3; Thu, 12 Sep 2019 13:25:25 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id 2E7A71E9B4 for ; Thu, 12 Sep 2019 13:25:23 +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 BD2FE28; Thu, 12 Sep 2019 04:25:22 -0700 (PDT) Received: from net-arm-thunderx2-01.test.ast.arm.com (net-arm-thunderx2-01.shanghai.arm.com [10.169.40.40]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id D78073F67D; Thu, 12 Sep 2019 04:25:20 -0700 (PDT) From: Gavin Hu To: dev@dpdk.org Cc: nd@arm.com, thomas@monjalon.net, stephen@networkplumber.org, hemant.agrawal@nxp.com, jerinj@marvell.com, pbhagavatula@marvell.com, Honnappa.Nagarahalli@arm.com Date: Thu, 12 Sep 2019 19:24:33 +0800 Message-Id: <1568287473-55306-9-git-send-email-gavin.hu@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1568287473-55306-1-git-send-email-gavin.hu@arm.com> References: <1568287473-55306-1-git-send-email-gavin.hu@arm.com> In-Reply-To: <1561911676-37718-1-git-send-email-gavin.hu@arm.com> References: <1561911676-37718-1-git-send-email-gavin.hu@arm.com> Subject: [dpdk-dev] [PATCH v5 8/8] event/opdl: use new API to save cycles on aarch64 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 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" Use the new API to wait in low power state instead of continuous polling to save CPU cycles and power. Signed-off-by: Gavin Hu Reviewed-by: Ruifeng Wang --- drivers/event/opdl/opdl_ring.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/event/opdl/opdl_ring.c b/drivers/event/opdl/opdl_ring.c index e8b29e2..f446fa3 100644 --- a/drivers/event/opdl/opdl_ring.c +++ b/drivers/event/opdl/opdl_ring.c @@ -17,6 +17,7 @@ #include #include #include +#include #include "opdl_ring.h" #include "opdl_log.h" @@ -475,9 +476,7 @@ opdl_ring_input_multithread(struct opdl_ring *t, const void *entries, /* If another thread started inputting before this one, but hasn't * finished, we need to wait for it to complete to update the tail. */ - while (unlikely(__atomic_load_n(&s->shared.tail, __ATOMIC_ACQUIRE) != - old_head)) - rte_pause(); + rte_wait_until_equal_acquire_32(&s->shared.tail, old_head); __atomic_store_n(&s->shared.tail, old_head + num_entries, __ATOMIC_RELEASE); -- 2.7.4