From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by dpdk.org (Postfix) with ESMTP id 60C851BF50 for ; Wed, 27 Jun 2018 16:50:21 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 063F8818F6F5; Wed, 27 Jun 2018 14:50:21 +0000 (UTC) Received: from localhost.localdomain (ovpn-112-39.ams2.redhat.com [10.36.112.39]) by smtp.corp.redhat.com (Postfix) with ESMTP id E460F20389E0; Wed, 27 Jun 2018 14:50:19 +0000 (UTC) From: Maxime Coquelin To: tiwei.bie@intel.com, zhihong.wang@intel.com, dev@dpdk.org Cc: Maxime Coquelin Date: Wed, 27 Jun 2018 16:49:58 +0200 Message-Id: <20180627144959.17277-7-maxime.coquelin@redhat.com> In-Reply-To: <20180627144959.17277-1-maxime.coquelin@redhat.com> References: <20180627144959.17277-1-maxime.coquelin@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Wed, 27 Jun 2018 14:50:21 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Wed, 27 Jun 2018 14:50:21 +0000 (UTC) for IP:'10.11.54.6' DOMAIN:'int-mx06.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'maxime.coquelin@redhat.com' RCPT:'' Subject: [dpdk-dev] [PATCH v3 6/7] vhost: prefetch first descriptor in dequeue path 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: , X-List-Received-Date: Wed, 27 Jun 2018 14:50:21 -0000 Signed-off-by: Maxime Coquelin --- lib/librte_vhost/virtio_net.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c index 404968cd0..ff6fa8d61 100644 --- a/lib/librte_vhost/virtio_net.c +++ b/lib/librte_vhost/virtio_net.c @@ -1082,6 +1082,8 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id, vq->shadow_used_idx = 0; } + rte_prefetch0(&vq->avail->ring[vq->last_avail_idx & (vq->size - 1)]); + /* * Construct a RARP broadcast packet, and inject it to the "pkts" * array, to looks like that guest actually send such packet. -- 2.14.4