From patchwork Wed Dec 5 09:49:56 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Coquelin X-Patchwork-Id: 48540 X-Patchwork-Delegate: maxime.coquelin@redhat.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id B02841B1FC; Wed, 5 Dec 2018 10:50:42 +0100 (CET) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 14E341B160 for ; Wed, 5 Dec 2018 10:50:41 +0100 (CET) Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 76376300272E; Wed, 5 Dec 2018 09:50:40 +0000 (UTC) Received: from localhost.localdomain (ovpn-112-38.ams2.redhat.com [10.36.112.38]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1C9F05D780; Wed, 5 Dec 2018 09:50:37 +0000 (UTC) From: Maxime Coquelin To: dev@dpdk.org, jfreimann@redhat.com, tiwei.bie@intel.com, zhihong.wang@intel.com, jasowang@redhat.com Cc: Maxime Coquelin Date: Wed, 5 Dec 2018 10:49:56 +0100 Message-Id: <20181205094957.1938-5-maxime.coquelin@redhat.com> In-Reply-To: <20181205094957.1938-1-maxime.coquelin@redhat.com> References: <20181205094957.1938-1-maxime.coquelin@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.46]); Wed, 05 Dec 2018 09:50:40 +0000 (UTC) Subject: [dpdk-dev] [PATCH 4/5] vhost: remove useless prefetch for packed ring descriptor 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" This prefetch does not show any performance improvement. Signed-off-by: Maxime Coquelin --- lib/librte_vhost/virtio_net.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c index 0a860ca72..679ce388b 100644 --- a/lib/librte_vhost/virtio_net.c +++ b/lib/librte_vhost/virtio_net.c @@ -1476,8 +1476,6 @@ virtio_dev_tx_packed(struct virtio_net *dev, struct vhost_virtqueue *vq, { uint16_t i; - rte_prefetch0(&vq->desc_packed[vq->last_avail_idx]); - if (unlikely(dev->dequeue_zero_copy)) { struct zcopy_mbuf *zmbuf, *next;