From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 72A7145702; Wed, 31 Jul 2024 17:14:07 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 4669142709; Wed, 31 Jul 2024 17:14:07 +0200 (CEST) Received: from dkmailrelay1.smartsharesystems.com (smartserver.smartsharesystems.com [77.243.40.215]) by mails.dpdk.org (Postfix) with ESMTP id D26004065A for ; Wed, 31 Jul 2024 17:13:20 +0200 (CEST) Received: from smartserver.smartsharesystems.com (smartserver.smartsharesys.local [192.168.4.10]) by dkmailrelay1.smartsharesystems.com (Postfix) with ESMTP id 8C4242099B; Wed, 31 Jul 2024 17:13:20 +0200 (CEST) Received: from dkrd4.smartsharesys.local ([192.168.4.26]) by smartserver.smartsharesystems.com with Microsoft SMTPSVC(6.0.3790.4675); Wed, 31 Jul 2024 17:13:19 +0200 From: =?UTF-8?q?Morten=20Br=C3=B8rup?= To: maxime.coquelin@redhat.com, chenbox@nvidia.com Cc: dev@dpdk.org, =?UTF-8?q?Morten=20Br=C3=B8rup?= Subject: [PATCH v3] virtio: optimize stats counters performance Date: Wed, 31 Jul 2024 15:13:18 +0000 Message-ID: <20240731151318.38410-1-mb@smartsharesystems.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240731131744.36448-1-mb@smartsharesystems.com> References: <20240731131744.36448-1-mb@smartsharesystems.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-OriginalArrivalTime: 31 Jul 2024 15:13:19.0860 (UTC) FILETIME=[2D5FCB40:01DAE35C] X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Optimized the performance of updating the virtio statistics counters by reducing the number of branches and inlining the function. Ordered the packet size comparisons according to the probability with typical internet traffic mix. Signed-off-by: Morten Brørup --- v3: * Eliminated a local variable. * Note: Substituted sizeof(uint32_t)*4 by 32UL, using unsigned long type to keep optimal offsetting in generated assembler output. * Removed unnecessary curly braces. v2: * Fixed checkpatch warning about line length. --- drivers/net/virtio/virtio_rxtx.c | 34 -------------------------------- drivers/net/virtio/virtio_rxtx.h | 23 +++++++++++++++++++-- 2 files changed, 21 insertions(+), 36 deletions(-) diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c index f69b9453a2..bb04fd7d43 100644 --- a/drivers/net/virtio/virtio_rxtx.c +++ b/drivers/net/virtio/virtio_rxtx.c @@ -81,40 +81,6 @@ vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx) dp->next = VQ_RING_DESC_CHAIN_END; } -void -virtio_update_packet_stats(struct virtnet_stats *stats, struct rte_mbuf *mbuf) -{ - uint32_t s = mbuf->pkt_len; - struct rte_ether_addr *ea; - - stats->bytes += s; - - if (s == 64) { - stats->size_bins[1]++; - } else if (s > 64 && s < 1024) { - uint32_t bin; - - /* count zeros, and offset into correct bin */ - bin = (sizeof(s) * 8) - rte_clz32(s) - 5; - stats->size_bins[bin]++; - } else { - if (s < 64) - stats->size_bins[0]++; - else if (s < 1519) - stats->size_bins[6]++; - else - stats->size_bins[7]++; - } - - ea = rte_pktmbuf_mtod(mbuf, struct rte_ether_addr *); - if (rte_is_multicast_ether_addr(ea)) { - if (rte_is_broadcast_ether_addr(ea)) - stats->broadcast++; - else - stats->multicast++; - } -} - static inline void virtio_rx_stats_updated(struct virtnet_rx *rxvq, struct rte_mbuf *m) { diff --git a/drivers/net/virtio/virtio_rxtx.h b/drivers/net/virtio/virtio_rxtx.h index afc4b74534..bcd552b907 100644 --- a/drivers/net/virtio/virtio_rxtx.h +++ b/drivers/net/virtio/virtio_rxtx.h @@ -35,7 +35,26 @@ struct virtnet_tx { }; int virtio_rxq_vec_setup(struct virtnet_rx *rxvq); -void virtio_update_packet_stats(struct virtnet_stats *stats, - struct rte_mbuf *mbuf); + +static inline void +virtio_update_packet_stats(struct virtnet_stats *const stats, const struct rte_mbuf *const mbuf) +{ + uint32_t s = mbuf->pkt_len; + const struct rte_ether_addr *ea = rte_pktmbuf_mtod(mbuf, const struct rte_ether_addr *); + + stats->bytes += s; + + if (s >= 1024) + stats->size_bins[6 + (s > 1518)]++; + else if (s <= 64) + stats->size_bins[s >> 6]++; + else + stats->size_bins[32UL - rte_clz32(s) - 5]++; + + RTE_BUILD_BUG_ON(offsetof(struct virtnet_stats, broadcast) != + offsetof(struct virtnet_stats, multicast) + sizeof(uint64_t)); + if (rte_is_multicast_ether_addr(ea)) + (&stats->multicast)[rte_is_broadcast_ether_addr(ea)]++; +} #endif /* _VIRTIO_RXTX_H_ */ -- 2.43.0