From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <dev-bounces@dpdk.org> Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 2CBDDA2EEB for <public@inbox.dpdk.org>; Sat, 14 Sep 2019 17:01:15 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 9346E1E999; Sat, 14 Sep 2019 17:00:32 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id 4B03D1E971 for <dev@dpdk.org>; Sat, 14 Sep 2019 17:00:30 +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 D039D28; Sat, 14 Sep 2019 08:00:29 -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 9ED9E3F67D; Sat, 14 Sep 2019 08:00:27 -0700 (PDT) From: Gavin Hu <gavin.hu@arm.com> 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, ruifeng.wang@arm.com, phil.yang@arm.com, steve.capper@arm.com Date: Sat, 14 Sep 2019 22:59:55 +0800 Message-Id: <1568473196-34972-7-git-send-email-gavin.hu@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1568473196-34972-1-git-send-email-gavin.hu@arm.com> References: <1568473196-34972-1-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 v6 6/7] net/thunderx: 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 <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> 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 <gavin.hu@arm.com> Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com> Acked-by: Jerin Jacob <jerinj@marvell.com> --- drivers/net/thunderx/nicvf_rxtx.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/thunderx/nicvf_rxtx.c b/drivers/net/thunderx/nicvf_rxtx.c index 1c42874..16f34c6 100644 --- a/drivers/net/thunderx/nicvf_rxtx.c +++ b/drivers/net/thunderx/nicvf_rxtx.c @@ -385,8 +385,7 @@ nicvf_fill_rbdr(struct nicvf_rxq *rxq, int to_fill) ltail++; } - while (__atomic_load_n(&rbdr->tail, __ATOMIC_RELAXED) != next_tail) - rte_pause(); + rte_wait_until_equal_relaxed_32(&rbdr->tail, next_tail); __atomic_store_n(&rbdr->tail, ltail, __ATOMIC_RELEASE); nicvf_addr_write(door, to_fill); -- 2.7.4