From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id B9721A2EDB for ; Tue, 1 Oct 2019 12:00:18 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 935484CE4; Tue, 1 Oct 2019 12:00:18 +0200 (CEST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 0A38923D; Tue, 1 Oct 2019 12:00:17 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 1150183F3C; Tue, 1 Oct 2019 10:00:16 +0000 (UTC) Received: from [10.36.112.56] (ovpn-112-56.ams2.redhat.com [10.36.112.56]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 20AB860623; Tue, 1 Oct 2019 10:00:12 +0000 (UTC) To: David Christensen , dev@dpdk.org Cc: stable@dpdk.org, thibaut.collet@6wind.com, tiwei.bie@intel.com, zhihong.wang@intel.com, jerinj@marvell.com, gavin.hu@arm.com References: <4532a3e5b53802da7e1b35c6c9383b406a18c30d.1568216827.git.thierry.herbelot@6wind.com> <20190930182754.20494-1-drc@linux.vnet.ibm.com> From: Maxime Coquelin Autocrypt: addr=maxime.coquelin@redhat.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.0 MIME-Version: 1.0 In-Reply-To: <20190930182754.20494-1-drc@linux.vnet.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 01 Oct 2019 10:00:16 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH] net/virtio: fix Rx stats with altivec vectorized functions 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" Thanks David for the fix, On 9/30/19 8:27 PM, David Christensen wrote: > With vectorized functions, only the rx stats for number of packets is > incremented. > Update also the other statistics. > Performance impact is about 2% > > Fixes: fc3d66212fed ("virtio: add vector Rx") > Cc: stable@dpdk.org > Cc: thibaut.collet@6wind.com > Cc: maxime.coquelin@redhat.com > Cc: tiwei.bie@intel.com > Cc: zhihong.wang@intel.com The commit message seems like a copy-paste, so claim about performance impact may be not true, same for the Fixes line, which points to a commit when altivec was not here yet. I'll fix that when appyling: Reviewed-by: Maxime Coquelin Thanks, Maxime > Signed-off-by: David Christensen > --- > drivers/net/virtio/virtio_rxtx_simple_altivec.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/net/virtio/virtio_rxtx_simple_altivec.c b/drivers/net/virtio/virtio_rxtx_simple_altivec.c > index 1cd732dec..f856396ab 100644 > --- a/drivers/net/virtio/virtio_rxtx_simple_altivec.c > +++ b/drivers/net/virtio/virtio_rxtx_simple_altivec.c > @@ -49,6 +49,7 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts, > struct vring_used_elem *rused; > struct rte_mbuf **sw_ring; > struct rte_mbuf **sw_ring_end; > + struct rte_mbuf **ref_rx_pkts; > uint16_t nb_pkts_received = 0; > const vector unsigned char zero = {0}; > > @@ -108,6 +109,7 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts, > virtqueue_notify(vq); > } > > + ref_rx_pkts = rx_pkts; > for (nb_pkts_received = 0; > nb_pkts_received < nb_used;) { > vector unsigned char desc[RTE_VIRTIO_DESC_PER_LOOP / 2]; > @@ -199,5 +201,8 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts, > vq->vq_used_cons_idx += nb_pkts_received; > vq->vq_free_cnt += nb_pkts_received; > rxvq->stats.packets += nb_pkts_received; > + for (nb_used = 0; nb_used < nb_pkts_received; nb_used++) > + virtio_update_packet_stats(&rxvq->stats, ref_rx_pkts[nb_used]); > + > return nb_pkts_received; > } >