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 D6091A2EFC for ; Thu, 19 Sep 2019 10:57:31 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 8F1841E936; Thu, 19 Sep 2019 10:56:48 +0200 (CEST) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by dpdk.org (Postfix) with ESMTP id B862A1C2B6 for ; Thu, 19 Sep 2019 10:56:35 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Sep 2019 01:56:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,523,1559545200"; d="scan'208";a="271146126" Received: from npg-dpdk-virtual-marvin-dev.sh.intel.com ([10.67.119.142]) by orsmga001.jf.intel.com with ESMTP; 19 Sep 2019 01:56:33 -0700 From: Marvin Liu To: maxime.coquelin@redhat.com, tiwei.bie@intel.com, zhihong.wang@intel.com Cc: dev@dpdk.org, Marvin Liu Date: Fri, 20 Sep 2019 00:36:34 +0800 Message-Id: <20190919163643.24130-8-yong.liu@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190919163643.24130-1-yong.liu@intel.com> References: <20190905161421.55981-2-yong.liu@intel.com> <20190919163643.24130-1-yong.liu@intel.com> Subject: [dpdk-dev] [PATCH v2 07/16] vhost: flush vhost enqueue shadow ring by burst 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" Buffer vhost enqueue shadow ring update, flush shadow ring until buffered descriptors number exceed one burst. Thus virtio can receive packets at a faster frequency. Signed-off-by: Marvin Liu diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h index 9fa3c8adf..000648dd4 100644 --- a/lib/librte_vhost/vhost.h +++ b/lib/librte_vhost/vhost.h @@ -163,6 +163,7 @@ struct vhost_virtqueue { struct vring_used_elem_packed *shadow_used_packed; }; uint16_t shadow_used_idx; + uint16_t enqueue_shadow_count; struct vhost_vring_addr ring_addrs; struct batch_copy_elem *batch_copy_elems; diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c index ebd6c175d..e2787b72e 100644 --- a/lib/librte_vhost/virtio_net.c +++ b/lib/librte_vhost/virtio_net.c @@ -169,6 +169,24 @@ update_shadow_packed(struct vhost_virtqueue *vq, vq->shadow_used_packed[i].count = count; } +static __rte_always_inline void +update_enqueue_shadow_packed(struct vhost_virtqueue *vq, uint16_t desc_idx, + uint32_t len, uint16_t count) +{ + /* enqueue shadow flush action aligned with burst num */ + if (!vq->shadow_used_idx) + vq->enqueue_shadow_count = vq->last_used_idx & + PACKED_BURST_MASK; + + uint16_t i = vq->shadow_used_idx++; + + vq->shadow_used_packed[i].id = desc_idx; + vq->shadow_used_packed[i].len = len; + vq->shadow_used_packed[i].count = count; + + vq->enqueue_shadow_count += count; +} + static inline void do_data_copy_enqueue(struct virtio_net *dev, struct vhost_virtqueue *vq) { @@ -198,6 +216,21 @@ do_data_copy_dequeue(struct vhost_virtqueue *vq) vq->batch_copy_nb_elems = 0; } +static __rte_always_inline void +flush_enqueue_packed(struct virtio_net *dev, + struct vhost_virtqueue *vq, uint32_t len[], uint16_t id[], + uint16_t count[], uint16_t num_buffers) +{ + int i; + for (i = 0; i < num_buffers; i++) { + update_enqueue_shadow_packed(vq, id[i], len[i], count[i]); + + if (vq->enqueue_shadow_count >= PACKED_DESCS_BURST) { + do_data_copy_enqueue(dev, vq); + flush_shadow_packed(dev, vq); + } + } +} /* avoid write operation when necessary, to lessen cache issues */ #define ASSIGN_UNLESS_EQUAL(var, val) do { \ if ((var) != (val)) \ @@ -799,6 +832,9 @@ vhost_enqueue_single_packed(struct virtio_net *dev, struct vhost_virtqueue *vq, max_tries = 1; uint16_t num_buffers = 0; + uint32_t buffer_len[max_tries]; + uint16_t buffer_buf_id[max_tries]; + uint16_t buffer_desc_count[max_tries]; while (size > 0) { /* @@ -821,6 +857,10 @@ vhost_enqueue_single_packed(struct virtio_net *dev, struct vhost_virtqueue *vq, size -= len; + buffer_len[num_buffers] = len; + buffer_buf_id[num_buffers] = buf_id; + buffer_desc_count[num_buffers] = desc_count; + avail_idx += desc_count; if (avail_idx >= vq->size) avail_idx -= vq->size; @@ -835,6 +875,9 @@ vhost_enqueue_single_packed(struct virtio_net *dev, struct vhost_virtqueue *vq, return 0; } + flush_enqueue_packed(dev, vq, buffer_len, buffer_buf_id, + buffer_desc_count, num_buffers); + return 0; } -- 2.17.1