From patchwork Tue Apr 13 14:55:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jiang, Cheng1" X-Patchwork-Id: 91277 X-Patchwork-Delegate: maxime.coquelin@redhat.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id D5D6BA0524; Tue, 13 Apr 2021 17:09:16 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id A4F881610E6; Tue, 13 Apr 2021 17:09:16 +0200 (CEST) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by mails.dpdk.org (Postfix) with ESMTP id DBBDA1610E3 for ; Tue, 13 Apr 2021 17:09:14 +0200 (CEST) IronPort-SDR: gU4u6+4slUUGlPHru6LQNtsk+AxufaxmkdC1lgshrIgo5IhI9rU2oTwv1rW6+hREJOKyco36CX qXOLZTxlX+mA== X-IronPort-AV: E=McAfee;i="6200,9189,9953"; a="174533403" X-IronPort-AV: E=Sophos;i="5.82,219,1613462400"; d="scan'208";a="174533403" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Apr 2021 08:09:11 -0700 IronPort-SDR: QMwDIjzJxvSUNYXDUPv88SluUGZKMJFRmwyYqmQLFYpIL9GIrtvfdJUZnd0496QfjwF+lwKzhb KqVWTOgON0qQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,219,1613462400"; d="scan'208";a="460614305" Received: from dpdk_jiangcheng.sh.intel.com ([10.67.119.112]) by orsmga001.jf.intel.com with ESMTP; 13 Apr 2021 08:09:09 -0700 From: Cheng Jiang To: maxime.coquelin@redhat.com, chenbo.xia@intel.com Cc: dev@dpdk.org, jiayu.hu@intel.com, yvonnex.yang@intel.com, yinan.wang@intel.com, yong.liu@intel.com, Cheng Jiang Date: Tue, 13 Apr 2021 14:55:49 +0000 Message-Id: <20210413145552.41894-2-Cheng1.jiang@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210413145552.41894-1-Cheng1.jiang@intel.com> References: <20210317085426.10119-1-Cheng1.jiang@intel.com> <20210413145552.41894-1-Cheng1.jiang@intel.com> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v6 1/4] vhost: abstract and reorganize async split ring code 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 Sender: "dev" This patch puts some codes of async vhost split ring into inline functions to improve the readability of the code. And, it changes the pointer index style of iterator to make the code more concise. Signed-off-by: Cheng Jiang --- lib/librte_vhost/virtio_net.c | 132 +++++++++++++++++----------------- 1 file changed, 66 insertions(+), 66 deletions(-) diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c index ff3987860..438bdafd1 100644 --- a/lib/librte_vhost/virtio_net.c +++ b/lib/librte_vhost/virtio_net.c @@ -1458,6 +1458,22 @@ virtio_dev_rx_async_get_info_idx(uint16_t pkts_idx, (vq_size - n_inflight + pkts_idx) & (vq_size - 1); } +static __rte_always_inline void +store_dma_desc_info_split(struct vring_used_elem *s_ring, struct vring_used_elem *d_ring, + uint16_t ring_size, uint16_t s_idx, uint16_t d_idx, uint16_t count) +{ + uint16_t elem_size = sizeof(struct vring_used_elem); + + if (d_idx + count <= ring_size) { + rte_memcpy(d_ring + d_idx, s_ring + s_idx, count * elem_size); + } else { + uint16_t size = ring_size - d_idx; + + rte_memcpy(d_ring + d_idx, s_ring + s_idx, size * elem_size); + rte_memcpy(d_ring, s_ring + s_idx + size, (count - size) * elem_size); + } +} + static __rte_noinline uint32_t virtio_dev_rx_async_submit_split(struct virtio_net *dev, struct vhost_virtqueue *vq, uint16_t queue_id, @@ -1474,10 +1490,9 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev, struct rte_vhost_async_desc tdes[MAX_PKT_BURST]; struct iovec *src_iovec = vec_pool; struct iovec *dst_iovec = vec_pool + (VHOST_MAX_ASYNC_VEC >> 1); - struct rte_vhost_iov_iter *src_it = it_pool; - struct rte_vhost_iov_iter *dst_it = it_pool + 1; uint16_t slot_idx = 0; uint16_t segs_await = 0; + uint16_t iovec_idx = 0, it_idx = 0; struct async_inflight_info *pkts_info = vq->async_pkts_info; uint32_t n_pkts = 0, pkt_err = 0; uint32_t num_async_pkts = 0, num_done_pkts = 0; @@ -1511,29 +1526,30 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev, dev->vid, vq->last_avail_idx, vq->last_avail_idx + num_buffers); - if (async_mbuf_to_desc(dev, vq, pkts[pkt_idx], - buf_vec, nr_vec, num_buffers, - src_iovec, dst_iovec, src_it, dst_it) < 0) { + if (async_mbuf_to_desc(dev, vq, pkts[pkt_idx], buf_vec, nr_vec, num_buffers, + &src_iovec[iovec_idx], &dst_iovec[iovec_idx], + &it_pool[it_idx], &it_pool[it_idx + 1]) < 0) { vq->shadow_used_idx -= num_buffers; break; } slot_idx = (vq->async_pkts_idx + num_async_pkts) & (vq->size - 1); - if (src_it->count) { + if (it_pool[it_idx].count) { uint16_t from, to; - async_fill_desc(&tdes[pkt_burst_idx++], src_it, dst_it); + async_fill_desc(&tdes[pkt_burst_idx++], + &it_pool[it_idx], &it_pool[it_idx + 1]); pkts_info[slot_idx].descs = num_buffers; pkts_info[slot_idx].mbuf = pkts[pkt_idx]; async_pkts_log[num_async_pkts].pkt_idx = pkt_idx; async_pkts_log[num_async_pkts++].last_avail_idx = vq->last_avail_idx; - src_iovec += src_it->nr_segs; - dst_iovec += dst_it->nr_segs; - src_it += 2; - dst_it += 2; - segs_await += src_it->nr_segs; + + iovec_idx += it_pool[it_idx].nr_segs; + it_idx += 2; + + segs_await += it_pool[it_idx].nr_segs; /** * recover shadow used ring and keep DMA-occupied @@ -1541,23 +1557,10 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev, */ from = vq->shadow_used_idx - num_buffers; to = vq->async_desc_idx & (vq->size - 1); - if (num_buffers + to <= vq->size) { - rte_memcpy(&vq->async_descs_split[to], - &vq->shadow_used_split[from], - num_buffers * - sizeof(struct vring_used_elem)); - } else { - int size = vq->size - to; - - rte_memcpy(&vq->async_descs_split[to], - &vq->shadow_used_split[from], - size * - sizeof(struct vring_used_elem)); - rte_memcpy(vq->async_descs_split, - &vq->shadow_used_split[from + - size], (num_buffers - size) * - sizeof(struct vring_used_elem)); - } + + store_dma_desc_info_split(vq->shadow_used_split, + vq->async_descs_split, vq->size, from, to, num_buffers); + vq->async_desc_idx += num_buffers; vq->shadow_used_idx -= num_buffers; } else @@ -1575,10 +1578,9 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev, BUF_VECTOR_MAX))) { n_pkts = vq->async_ops.transfer_data(dev->vid, queue_id, tdes, 0, pkt_burst_idx); - src_iovec = vec_pool; - dst_iovec = vec_pool + (VHOST_MAX_ASYNC_VEC >> 1); - src_it = it_pool; - dst_it = it_pool + 1; + iovec_idx = 0; + it_idx = 0; + segs_await = 0; vq->async_pkts_inflight_n += n_pkts; @@ -1639,6 +1641,36 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev, return pkt_idx; } +static __rte_always_inline void +write_back_completed_descs_split(struct vhost_virtqueue *vq, uint16_t n_descs) +{ + uint16_t nr_left = n_descs; + uint16_t nr_copy; + uint16_t to, from; + + do { + from = vq->last_async_desc_idx & (vq->size - 1); + nr_copy = nr_left + from <= vq->size ? nr_left : vq->size - from; + to = vq->last_used_idx & (vq->size - 1); + + if (to + nr_copy <= vq->size) { + rte_memcpy(&vq->used->ring[to], &vq->async_descs_split[from], + nr_copy * sizeof(struct vring_used_elem)); + } else { + uint16_t size = vq->size - to; + + rte_memcpy(&vq->used->ring[to], &vq->async_descs_split[from], + size * sizeof(struct vring_used_elem)); + rte_memcpy(&vq->used->ring[0], &vq->async_descs_split[from + size], + (nr_copy - size) * sizeof(struct vring_used_elem)); + } + + vq->last_async_desc_idx += nr_copy; + vq->last_used_idx += nr_copy; + nr_left -= nr_copy; + } while (nr_left > 0); +} + uint16_t rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id, struct rte_mbuf **pkts, uint16_t count) { @@ -1695,39 +1727,7 @@ uint16_t rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id, vq->async_pkts_inflight_n -= n_pkts_put; if (likely(vq->enabled && vq->access_ok)) { - uint16_t nr_left = n_descs; - uint16_t nr_copy; - uint16_t to; - - /* write back completed descriptors to used ring */ - do { - from = vq->last_async_desc_idx & (vq->size - 1); - nr_copy = nr_left + from <= vq->size ? nr_left : - vq->size - from; - to = vq->last_used_idx & (vq->size - 1); - - if (to + nr_copy <= vq->size) { - rte_memcpy(&vq->used->ring[to], - &vq->async_descs_split[from], - nr_copy * - sizeof(struct vring_used_elem)); - } else { - uint16_t size = vq->size - to; - - rte_memcpy(&vq->used->ring[to], - &vq->async_descs_split[from], - size * - sizeof(struct vring_used_elem)); - rte_memcpy(vq->used->ring, - &vq->async_descs_split[from + - size], (nr_copy - size) * - sizeof(struct vring_used_elem)); - } - - vq->last_async_desc_idx += nr_copy; - vq->last_used_idx += nr_copy; - nr_left -= nr_copy; - } while (nr_left > 0); + write_back_completed_descs_split(vq, n_descs); __atomic_add_fetch(&vq->used->idx, n_descs, __ATOMIC_RELEASE); vhost_vring_call_split(dev, vq); From patchwork Tue Apr 13 14:55:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jiang, Cheng1" X-Patchwork-Id: 91278 X-Patchwork-Delegate: maxime.coquelin@redhat.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 15193A0524; Tue, 13 Apr 2021 17:09:23 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id F05F81610EC; Tue, 13 Apr 2021 17:09:17 +0200 (CEST) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by mails.dpdk.org (Postfix) with ESMTP id 873901610E4 for ; Tue, 13 Apr 2021 17:09:16 +0200 (CEST) IronPort-SDR: oZLTylfNyTyqYsATRkuFHFcK/VkiypCmbFZEy23l5+m2KdxNkRsLY+/znuYEHRrAz4jEbM3gf6 PKtarPEK/i4Q== X-IronPort-AV: E=McAfee;i="6200,9189,9953"; a="174533415" X-IronPort-AV: E=Sophos;i="5.82,219,1613462400"; d="scan'208";a="174533415" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Apr 2021 08:09:15 -0700 IronPort-SDR: 5/0knvwKEU8WYvpr+tWkXYD/lej+XJ8mxTLCAGMTKMb0kqoIMX23gQ6au7bjvQ7pre+577dMV/ c3KnF3FPirwg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,219,1613462400"; d="scan'208";a="460614318" Received: from dpdk_jiangcheng.sh.intel.com ([10.67.119.112]) by orsmga001.jf.intel.com with ESMTP; 13 Apr 2021 08:09:12 -0700 From: Cheng Jiang To: maxime.coquelin@redhat.com, chenbo.xia@intel.com Cc: dev@dpdk.org, jiayu.hu@intel.com, yvonnex.yang@intel.com, yinan.wang@intel.com, yong.liu@intel.com, Cheng Jiang Date: Tue, 13 Apr 2021 14:55:50 +0000 Message-Id: <20210413145552.41894-3-Cheng1.jiang@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210413145552.41894-1-Cheng1.jiang@intel.com> References: <20210317085426.10119-1-Cheng1.jiang@intel.com> <20210413145552.41894-1-Cheng1.jiang@intel.com> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v6 2/4] vhost: add support for packed ring in async vhost 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 Sender: "dev" For now async vhost data path only supports split ring. This patch enables packed ring in async vhost data path to make async vhost compatible with virtio 1.1 spec. Signed-off-by: Cheng Jiang --- lib/librte_vhost/rte_vhost_async.h | 1 + lib/librte_vhost/vhost.c | 37 ++- lib/librte_vhost/vhost.h | 15 +- lib/librte_vhost/virtio_net.c | 432 +++++++++++++++++++++++++++-- 4 files changed, 449 insertions(+), 36 deletions(-) diff --git a/lib/librte_vhost/rte_vhost_async.h b/lib/librte_vhost/rte_vhost_async.h index c855ff875..6faa31f5a 100644 --- a/lib/librte_vhost/rte_vhost_async.h +++ b/lib/librte_vhost/rte_vhost_async.h @@ -89,6 +89,7 @@ struct rte_vhost_async_channel_ops { struct async_inflight_info { struct rte_mbuf *mbuf; uint16_t descs; /* num of descs inflight */ + uint16_t nr_buffers; /* num of buffers inflight for packed ring */ }; /** diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index a70fe01d8..467d1d5a2 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -340,17 +340,18 @@ cleanup_device(struct virtio_net *dev, int destroy) static void vhost_free_async_mem(struct vhost_virtqueue *vq) { - if (vq->async_pkts_info) - rte_free(vq->async_pkts_info); - if (vq->async_descs_split) - rte_free(vq->async_descs_split); - if (vq->it_pool) - rte_free(vq->it_pool); - if (vq->vec_pool) - rte_free(vq->vec_pool); + rte_free(vq->async_pkts_info); - vq->async_pkts_info = NULL; + rte_free(vq->async_buffers_packed); + rte_free(vq->async_descs_split); + + rte_free(vq->it_pool); + rte_free(vq->vec_pool); + + vq->async_buffers_packed = NULL; vq->async_descs_split = NULL; + + vq->async_pkts_info = NULL; vq->it_pool = NULL; vq->vec_pool = NULL; } @@ -1626,10 +1627,9 @@ int rte_vhost_async_channel_register(int vid, uint16_t queue_id, if (unlikely(vq == NULL || !dev->async_copy)) return -1; - /* packed queue is not supported */ - if (unlikely(vq_is_packed(dev) || !f.async_inorder)) { + if (unlikely(!f.async_inorder)) { VHOST_LOG_CONFIG(ERR, - "async copy is not supported on packed queue or non-inorder mode " + "async copy is not supported on non-inorder mode " "(vid %d, qid: %d)\n", vid, queue_id); return -1; } @@ -1667,11 +1667,18 @@ int rte_vhost_async_channel_register(int vid, uint16_t queue_id, vq->vec_pool = rte_malloc_socket(NULL, VHOST_MAX_ASYNC_VEC * sizeof(struct iovec), RTE_CACHE_LINE_SIZE, node); - vq->async_descs_split = rte_malloc_socket(NULL, + if (vq_is_packed(dev)) { + vq->async_buffers_packed = rte_malloc_socket(NULL, + vq->size * sizeof(struct vring_used_elem_packed), + RTE_CACHE_LINE_SIZE, node); + } else { + vq->async_descs_split = rte_malloc_socket(NULL, vq->size * sizeof(struct vring_used_elem), RTE_CACHE_LINE_SIZE, node); - if (!vq->async_descs_split || !vq->async_pkts_info || - !vq->it_pool || !vq->vec_pool) { + } + + if (!vq->async_buffers_packed || !vq->async_descs_split || + !vq->async_pkts_info || !vq->it_pool || !vq->vec_pool) { vhost_free_async_mem(vq); VHOST_LOG_CONFIG(ERR, "async register failed: cannot allocate memory for vq data " diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h index f628714c2..673335217 100644 --- a/lib/librte_vhost/vhost.h +++ b/lib/librte_vhost/vhost.h @@ -201,9 +201,18 @@ struct vhost_virtqueue { uint16_t async_pkts_idx; uint16_t async_pkts_inflight_n; uint16_t async_last_pkts_n; - struct vring_used_elem *async_descs_split; - uint16_t async_desc_idx; - uint16_t last_async_desc_idx; + union { + struct vring_used_elem *async_descs_split; + struct vring_used_elem_packed *async_buffers_packed; + }; + union { + uint16_t async_desc_idx; + uint16_t async_packed_buffer_idx; + }; + union { + uint16_t last_async_desc_idx; + uint16_t last_async_buffer_idx; + }; /* vq async features */ bool async_inorder; diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c index 438bdafd1..e2b35a319 100644 --- a/lib/librte_vhost/virtio_net.c +++ b/lib/librte_vhost/virtio_net.c @@ -363,14 +363,14 @@ vhost_shadow_dequeue_single_packed_inorder(struct vhost_virtqueue *vq, } static __rte_always_inline void -vhost_shadow_enqueue_single_packed(struct virtio_net *dev, - struct vhost_virtqueue *vq, - uint32_t len[], - uint16_t id[], - uint16_t count[], +vhost_shadow_enqueue_packed(struct vhost_virtqueue *vq, + uint32_t *len, + uint16_t *id, + uint16_t *count, uint16_t num_buffers) { uint16_t i; + for (i = 0; i < num_buffers; i++) { /* enqueue shadow flush action aligned with batch num */ if (!vq->shadow_used_idx) @@ -382,6 +382,17 @@ vhost_shadow_enqueue_single_packed(struct virtio_net *dev, vq->shadow_aligned_idx += count[i]; vq->shadow_used_idx++; } +} + +static __rte_always_inline void +vhost_shadow_enqueue_single_packed(struct virtio_net *dev, + struct vhost_virtqueue *vq, + uint32_t *len, + uint16_t *id, + uint16_t *count, + uint16_t num_buffers) +{ + vhost_shadow_enqueue_packed(vq, len, id, count, num_buffers); if (vq->shadow_aligned_idx >= PACKED_BATCH_SIZE) { do_data_copy_enqueue(dev, vq); @@ -1474,6 +1485,23 @@ store_dma_desc_info_split(struct vring_used_elem *s_ring, struct vring_used_elem } } +static __rte_always_inline void +store_dma_desc_info_packed(struct vring_used_elem_packed *s_ring, + struct vring_used_elem_packed *d_ring, + uint16_t ring_size, uint16_t s_idx, uint16_t d_idx, uint16_t count) +{ + uint16_t elem_size = sizeof(struct vring_used_elem_packed); + + if (d_idx + count <= ring_size) { + rte_memcpy(d_ring + d_idx, s_ring + s_idx, count * elem_size); + } else { + uint16_t size = ring_size - d_idx; + + rte_memcpy(d_ring + d_idx, s_ring + s_idx, size * elem_size); + rte_memcpy(d_ring, s_ring + s_idx + size, (count - size) * elem_size); + } +} + static __rte_noinline uint32_t virtio_dev_rx_async_submit_split(struct virtio_net *dev, struct vhost_virtqueue *vq, uint16_t queue_id, @@ -1641,6 +1669,330 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev, return pkt_idx; } +static __rte_always_inline void +vhost_update_used_packed(struct vhost_virtqueue *vq, + struct vring_used_elem_packed *shadow_ring, + uint16_t count) +{ + int i; + uint16_t used_idx = vq->last_used_idx; + uint16_t head_idx = vq->last_used_idx; + uint16_t head_flags = 0; + + if (count == 0) + return; + + /* Split loop in two to save memory barriers */ + for (i = 0; i < count; i++) { + vq->desc_packed[used_idx].id = shadow_ring[i].id; + vq->desc_packed[used_idx].len = shadow_ring[i].len; + + used_idx += shadow_ring[i].count; + if (used_idx >= vq->size) + used_idx -= vq->size; + } + + /* The ordering for storing desc flags needs to be enforced. */ + rte_atomic_thread_fence(__ATOMIC_RELEASE); + + for (i = 0; i < count; i++) { + uint16_t flags; + + if (vq->shadow_used_packed[i].len) + flags = VRING_DESC_F_WRITE; + else + flags = 0; + + if (vq->used_wrap_counter) { + flags |= VRING_DESC_F_USED; + flags |= VRING_DESC_F_AVAIL; + } else { + flags &= ~VRING_DESC_F_USED; + flags &= ~VRING_DESC_F_AVAIL; + } + + if (i > 0) { + vq->desc_packed[vq->last_used_idx].flags = flags; + + } else { + head_idx = vq->last_used_idx; + head_flags = flags; + } + + vq_inc_last_used_packed(vq, shadow_ring[i].count); + } + + vq->desc_packed[head_idx].flags = head_flags; +} + +static __rte_always_inline int +vhost_enqueue_async_single_packed(struct virtio_net *dev, + struct vhost_virtqueue *vq, + struct rte_mbuf *pkt, + struct buf_vector *buf_vec, + uint16_t *nr_descs, + uint16_t *nr_buffers, + struct vring_packed_desc *async_descs, + struct iovec *src_iovec, struct iovec *dst_iovec, + struct rte_vhost_iov_iter *src_it, + struct rte_vhost_iov_iter *dst_it) +{ + uint16_t nr_vec = 0; + uint16_t avail_idx = vq->last_avail_idx; + uint16_t max_tries, tries = 0; + uint16_t buf_id = 0; + uint32_t len = 0; + uint16_t desc_count = 0; + uint32_t size = pkt->pkt_len + sizeof(struct virtio_net_hdr_mrg_rxbuf); + uint32_t buffer_len[vq->size]; + uint16_t buffer_buf_id[vq->size]; + uint16_t buffer_desc_count[vq->size]; + *nr_buffers = 0; + + if (rxvq_is_mergeable(dev)) + max_tries = vq->size - 1; + else + max_tries = 1; + + while (size > 0) { + /* + * if we tried all available ring items, and still + * can't get enough buf, it means something abnormal + * happened. + */ + if (unlikely(++tries > max_tries)) + return -1; + + if (unlikely(fill_vec_buf_packed(dev, vq, avail_idx, &desc_count, buf_vec, &nr_vec, + &buf_id, &len, VHOST_ACCESS_RW) < 0)) + return -1; + + len = RTE_MIN(len, size); + size -= len; + + buffer_len[*nr_buffers] = len; + buffer_buf_id[*nr_buffers] = buf_id; + buffer_desc_count[*nr_buffers] = desc_count; + *nr_buffers += 1; + + *nr_descs += desc_count; + avail_idx += desc_count; + if (avail_idx >= vq->size) + avail_idx -= vq->size; + } + + if (async_mbuf_to_desc(dev, vq, pkt, buf_vec, nr_vec, *nr_buffers, src_iovec, dst_iovec, + src_it, dst_it) < 0) + return -1; + /* store descriptors for DMA */ + if (avail_idx >= *nr_descs) { + rte_memcpy(async_descs, &vq->desc_packed[vq->last_avail_idx], + *nr_descs * sizeof(struct vring_packed_desc)); + } else { + uint16_t nr_copy = vq->size - vq->last_avail_idx; + rte_memcpy(async_descs, &vq->desc_packed[vq->last_avail_idx], + nr_copy * sizeof(struct vring_packed_desc)); + rte_memcpy(async_descs + nr_copy, vq->desc_packed, + (*nr_descs - nr_copy) * sizeof(struct vring_packed_desc)); + } + + vhost_shadow_enqueue_packed(vq, buffer_len, buffer_buf_id, buffer_desc_count, *nr_buffers); + + return 0; +} + +static __rte_always_inline int16_t +virtio_dev_rx_async_single_packed(struct virtio_net *dev, struct vhost_virtqueue *vq, + struct rte_mbuf *pkt, uint16_t *nr_descs, uint16_t *nr_buffers, + struct vring_packed_desc *async_descs, + struct iovec *src_iovec, struct iovec *dst_iovec, + struct rte_vhost_iov_iter *src_it, struct rte_vhost_iov_iter *dst_it) +{ + struct buf_vector buf_vec[BUF_VECTOR_MAX]; + *nr_descs = 0; + *nr_buffers = 0; + + if (unlikely(vhost_enqueue_async_single_packed(dev, vq, pkt, buf_vec, nr_descs, nr_buffers, + async_descs, src_iovec, dst_iovec, + src_it, dst_it) < 0)) { + VHOST_LOG_DATA(DEBUG, "(%d) failed to get enough desc from vring\n", dev->vid); + return -1; + } + + VHOST_LOG_DATA(DEBUG, "(%d) current index %d | end index %d\n", + dev->vid, vq->last_avail_idx, vq->last_avail_idx + *nr_descs); + + return 0; +} + +static __rte_always_inline void +dma_error_handler_packed(struct vhost_virtqueue *vq, struct vring_packed_desc *async_descs, + uint16_t async_descs_idx, uint16_t slot_idx, uint32_t nr_err, + uint32_t *pkt_idx, uint32_t *num_async_pkts, uint32_t *num_done_pkts) +{ + uint16_t descs_err = 0; + uint16_t buffers_err = 0; + struct async_inflight_info *pkts_info = vq->async_pkts_info; + + num_async_pkts -= nr_err; + pkt_idx -= nr_err; + /* calculate the sum of buffers and descs of DMA-error packets. */ + while (nr_err-- > 0) { + descs_err += pkts_info[slot_idx % vq->size].descs; + buffers_err += pkts_info[slot_idx % vq->size].nr_buffers; + slot_idx--; + } + + vq->async_packed_buffer_idx -= buffers_err; + + if (vq->last_avail_idx >= descs_err) { + vq->last_avail_idx -= descs_err; + + rte_memcpy(&vq->desc_packed[vq->last_avail_idx], + &async_descs[async_descs_idx - descs_err], + descs_err * sizeof(struct vring_packed_desc)); + } else { + uint16_t nr_copy; + + vq->last_avail_idx = vq->last_avail_idx + vq->size - descs_err; + nr_copy = vq->size - vq->last_avail_idx; + rte_memcpy(&vq->desc_packed[vq->last_avail_idx], + &async_descs[async_descs_idx - descs_err], + nr_copy * sizeof(struct vring_packed_desc)); + descs_err -= nr_copy; + rte_memcpy(&vq->desc_packed[0], &async_descs[async_descs_idx - descs_err], + descs_err * sizeof(struct vring_packed_desc)); + vq->avail_wrap_counter ^= 1; + } + + *num_done_pkts = *pkt_idx - *num_async_pkts; +} + +static __rte_noinline uint32_t +virtio_dev_rx_async_submit_packed(struct virtio_net *dev, + struct vhost_virtqueue *vq, uint16_t queue_id, + struct rte_mbuf **pkts, uint32_t count, + struct rte_mbuf **comp_pkts, uint32_t *comp_count) +{ + uint32_t pkt_idx = 0, pkt_burst_idx = 0; + uint16_t async_descs_idx = 0; + uint16_t num_buffers; + uint16_t num_desc; + + struct rte_vhost_iov_iter *it_pool = vq->it_pool; + struct iovec *vec_pool = vq->vec_pool; + struct rte_vhost_async_desc tdes[MAX_PKT_BURST]; + struct iovec *src_iovec = vec_pool; + struct iovec *dst_iovec = vec_pool + (VHOST_MAX_ASYNC_VEC >> 1); + uint16_t slot_idx = 0; + uint16_t segs_await = 0; + uint16_t iovec_idx = 0, it_idx = 0; + struct async_inflight_info *pkts_info = vq->async_pkts_info; + uint32_t n_pkts = 0, pkt_err = 0; + uint32_t num_async_pkts = 0, num_done_pkts = 0; + struct vring_packed_desc async_descs[vq->size]; + + rte_prefetch0(&vq->desc_packed[vq->last_avail_idx]); + + for (pkt_idx = 0; pkt_idx < count; pkt_idx++) { + if (unlikely(virtio_dev_rx_async_single_packed(dev, vq, pkts[pkt_idx], + &num_desc, &num_buffers, + &async_descs[async_descs_idx], + &src_iovec[iovec_idx], &dst_iovec[iovec_idx], + &it_pool[it_idx], &it_pool[it_idx + 1]) < 0)) + break; + + VHOST_LOG_DATA(DEBUG, "(%d) current index %d | end index %d\n", + dev->vid, vq->last_avail_idx, + vq->last_avail_idx + num_desc); + + slot_idx = (vq->async_pkts_idx + num_async_pkts) % vq->size; + if (it_pool[it_idx].count) { + uint16_t from, to; + + async_descs_idx += num_desc; + async_fill_desc(&tdes[pkt_burst_idx++], + &it_pool[it_idx], &it_pool[it_idx + 1]); + pkts_info[slot_idx].descs = num_desc; + pkts_info[slot_idx].nr_buffers = num_buffers; + pkts_info[slot_idx].mbuf = pkts[pkt_idx]; + num_async_pkts++; + iovec_idx += it_pool[it_idx].nr_segs; + it_idx += 2; + + segs_await += it_pool[it_idx].nr_segs; + + /** + * recover shadow used ring and keep DMA-occupied + * descriptors. + */ + from = vq->shadow_used_idx - num_buffers; + to = vq->async_packed_buffer_idx % vq->size; + store_dma_desc_info_packed(vq->shadow_used_packed, + vq->async_buffers_packed, vq->size, from, to, num_buffers); + + vq->async_packed_buffer_idx += num_buffers; + vq->shadow_used_idx -= num_buffers; + } else { + comp_pkts[num_done_pkts++] = pkts[pkt_idx]; + } + + vq_inc_last_avail_packed(vq, num_desc); + + /* + * conditions to trigger async device transfer: + * - buffered packet number reaches transfer threshold + * - unused async iov number is less than max vhost vector + */ + if (unlikely(pkt_burst_idx >= VHOST_ASYNC_BATCH_THRESHOLD || + ((VHOST_MAX_ASYNC_VEC >> 1) - segs_await < BUF_VECTOR_MAX))) { + n_pkts = vq->async_ops.transfer_data(dev->vid, queue_id, + tdes, 0, pkt_burst_idx); + iovec_idx = 0; + it_idx = 0; + segs_await = 0; + vq->async_pkts_inflight_n += n_pkts; + + if (unlikely(n_pkts < pkt_burst_idx)) { + /* + * log error packets number here and do actual + * error processing when applications poll + * completion + */ + pkt_err = pkt_burst_idx - n_pkts; + pkt_burst_idx = 0; + pkt_idx++; + break; + } + + pkt_burst_idx = 0; + } + } + + if (pkt_burst_idx) { + n_pkts = vq->async_ops.transfer_data(dev->vid, queue_id, tdes, 0, pkt_burst_idx); + vq->async_pkts_inflight_n += n_pkts; + + if (unlikely(n_pkts < pkt_burst_idx)) + pkt_err = pkt_burst_idx - n_pkts; + } + + do_data_copy_enqueue(dev, vq); + + if (unlikely(pkt_err)) + dma_error_handler_packed(vq, async_descs, async_descs_idx, slot_idx, pkt_err, + &pkt_idx, &num_async_pkts, &num_done_pkts); + vq->async_pkts_idx += num_async_pkts; + *comp_count = num_done_pkts; + + if (likely(vq->shadow_used_idx)) { + vhost_flush_enqueue_shadow_packed(dev, vq); + vhost_vring_call_packed(dev, vq); + } + + return pkt_idx; +} + static __rte_always_inline void write_back_completed_descs_split(struct vhost_virtqueue *vq, uint16_t n_descs) { @@ -1671,12 +2023,35 @@ write_back_completed_descs_split(struct vhost_virtqueue *vq, uint16_t n_descs) } while (nr_left > 0); } +static __rte_always_inline void +write_back_completed_descs_packed(struct vhost_virtqueue *vq, + uint16_t n_buffers) +{ + uint16_t nr_left = n_buffers; + uint16_t from, to; + + do { + from = vq->last_async_buffer_idx % vq->size; + to = (from + nr_left) % vq->size; + if (to > from) { + vhost_update_used_packed(vq, vq->async_buffers_packed + from, to - from); + vq->last_async_buffer_idx += nr_left; + nr_left = 0; + } else { + vhost_update_used_packed(vq, vq->async_buffers_packed + from, + vq->size - from); + vq->last_async_buffer_idx += vq->size - from; + nr_left -= vq->size - from; + } + } while (nr_left > 0); +} + uint16_t rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id, struct rte_mbuf **pkts, uint16_t count) { struct virtio_net *dev = get_device(vid); struct vhost_virtqueue *vq; - uint16_t n_pkts_cpl = 0, n_pkts_put = 0, n_descs = 0; + uint16_t n_pkts_cpl = 0, n_pkts_put = 0, n_descs = 0, n_buffers = 0; uint16_t start_idx, pkts_idx, vq_size; struct async_inflight_info *pkts_info; uint16_t from, i; @@ -1701,7 +2076,7 @@ uint16_t rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id, rte_spinlock_lock(&vq->access_lock); - pkts_idx = vq->async_pkts_idx & (vq->size - 1); + pkts_idx = vq->async_pkts_idx % vq->size; pkts_info = vq->async_pkts_info; vq_size = vq->size; start_idx = virtio_dev_rx_async_get_info_idx(pkts_idx, @@ -1718,21 +2093,41 @@ uint16_t rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id, goto done; } - for (i = 0; i < n_pkts_put; i++) { - from = (start_idx + i) & (vq_size - 1); - n_descs += pkts_info[from].descs; - pkts[i] = pkts_info[from].mbuf; + if (vq_is_packed(dev)) { + for (i = 0; i < n_pkts_put; i++) { + from = (start_idx + i) & (vq_size - 1); + n_buffers += pkts_info[from].nr_buffers; + pkts[i] = pkts_info[from].mbuf; + } + } else { + for (i = 0; i < n_pkts_put; i++) { + from = (start_idx + i) & (vq_size - 1); + n_descs += pkts_info[from].descs; + pkts[i] = pkts_info[from].mbuf; + } } + vq->async_last_pkts_n = n_pkts_cpl - n_pkts_put; vq->async_pkts_inflight_n -= n_pkts_put; if (likely(vq->enabled && vq->access_ok)) { - write_back_completed_descs_split(vq, n_descs); + if (vq_is_packed(dev)) { + write_back_completed_descs_packed(vq, n_buffers); - __atomic_add_fetch(&vq->used->idx, n_descs, __ATOMIC_RELEASE); - vhost_vring_call_split(dev, vq); - } else - vq->last_async_desc_idx += n_descs; + vhost_vring_call_packed(dev, vq); + } else { + write_back_completed_descs_split(vq, n_descs); + + __atomic_add_fetch(&vq->used->idx, n_descs, + __ATOMIC_RELEASE); + vhost_vring_call_split(dev, vq); + } + } else { + if (vq_is_packed(dev)) + vq->last_async_buffer_idx += n_buffers; + else + vq->last_async_desc_idx += n_descs; + } done: rte_spinlock_unlock(&vq->access_lock); @@ -1773,9 +2168,10 @@ virtio_dev_rx_async_submit(struct virtio_net *dev, uint16_t queue_id, if (count == 0) goto out; - /* TODO: packed queue not implemented */ if (vq_is_packed(dev)) - nb_tx = 0; + nb_tx = virtio_dev_rx_async_submit_packed(dev, + vq, queue_id, pkts, count, comp_pkts, + comp_count); else nb_tx = virtio_dev_rx_async_submit_split(dev, vq, queue_id, pkts, count, comp_pkts, From patchwork Tue Apr 13 14:55:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jiang, Cheng1" X-Patchwork-Id: 91279 X-Patchwork-Delegate: maxime.coquelin@redhat.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 9450BA0524; Tue, 13 Apr 2021 17:09:34 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id A191F160BDA; Tue, 13 Apr 2021 17:09:21 +0200 (CEST) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by mails.dpdk.org (Postfix) with ESMTP id F16AB1610F1 for ; Tue, 13 Apr 2021 17:09:19 +0200 (CEST) IronPort-SDR: iDlKbBVcXxrWkZOshzHjnwHlMMr3ZJmJDigOOqM2CP+sB+R5ELVrKOq/YCIpd08BUKckkPvbsy 8FIv8GlSwU4Q== X-IronPort-AV: E=McAfee;i="6200,9189,9953"; a="174533424" X-IronPort-AV: E=Sophos;i="5.82,219,1613462400"; d="scan'208";a="174533424" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Apr 2021 08:09:19 -0700 IronPort-SDR: LSdZUVDN9BfA1Ud5w1NEdRvsDIJFoMMwChzveU3l7YYfwL0GkX66lRe0v9KYdBu2Nw/egkE40M 07EMwtApGSOA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,219,1613462400"; d="scan'208";a="460614344" Received: from dpdk_jiangcheng.sh.intel.com ([10.67.119.112]) by orsmga001.jf.intel.com with ESMTP; 13 Apr 2021 08:09:16 -0700 From: Cheng Jiang To: maxime.coquelin@redhat.com, chenbo.xia@intel.com Cc: dev@dpdk.org, jiayu.hu@intel.com, yvonnex.yang@intel.com, yinan.wang@intel.com, yong.liu@intel.com, Cheng Jiang Date: Tue, 13 Apr 2021 14:55:51 +0000 Message-Id: <20210413145552.41894-4-Cheng1.jiang@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210413145552.41894-1-Cheng1.jiang@intel.com> References: <20210317085426.10119-1-Cheng1.jiang@intel.com> <20210413145552.41894-1-Cheng1.jiang@intel.com> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v6 3/4] vhost: add batch datapath for async vhost packed ring 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 Sender: "dev" Add batch datapath for async vhost packed ring to improve the performance of small packet processing. Signed-off-by: Cheng Jiang --- lib/librte_vhost/virtio_net.c | 41 +++++++++++++++++++++++++++++++---- 1 file changed, 37 insertions(+), 4 deletions(-) diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c index e2b35a319..42439a86d 100644 --- a/lib/librte_vhost/virtio_net.c +++ b/lib/librte_vhost/virtio_net.c @@ -1725,6 +1725,29 @@ vhost_update_used_packed(struct vhost_virtqueue *vq, vq->desc_packed[head_idx].flags = head_flags; } +static __rte_always_inline int +virtio_dev_rx_async_batch_packed(struct virtio_net *dev, + struct vhost_virtqueue *vq, + struct rte_mbuf **pkts, + struct rte_mbuf **comp_pkts, uint32_t *pkt_done) +{ + uint16_t i; + uint32_t cpy_threshold = vq->async_threshold; + + vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) { + if (unlikely(pkts[i]->pkt_len >= cpy_threshold)) + return -1; + } + if (!virtio_dev_rx_batch_packed(dev, vq, pkts)) { + vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) + comp_pkts[(*pkt_done)++] = pkts[i]; + + return 0; + } + + return -1; +} + static __rte_always_inline int vhost_enqueue_async_single_packed(struct virtio_net *dev, struct vhost_virtqueue *vq, @@ -1875,6 +1898,7 @@ virtio_dev_rx_async_submit_packed(struct virtio_net *dev, struct rte_mbuf **comp_pkts, uint32_t *comp_count) { uint32_t pkt_idx = 0, pkt_burst_idx = 0; + uint32_t remained = count; uint16_t async_descs_idx = 0; uint16_t num_buffers; uint16_t num_desc; @@ -1892,9 +1916,17 @@ virtio_dev_rx_async_submit_packed(struct virtio_net *dev, uint32_t num_async_pkts = 0, num_done_pkts = 0; struct vring_packed_desc async_descs[vq->size]; - rte_prefetch0(&vq->desc_packed[vq->last_avail_idx]); + do { + rte_prefetch0(&vq->desc_packed[vq->last_avail_idx]); + if (remained >= PACKED_BATCH_SIZE) { + if (!virtio_dev_rx_async_batch_packed(dev, vq, + &pkts[pkt_idx], comp_pkts, &num_done_pkts)) { + pkt_idx += PACKED_BATCH_SIZE; + remained -= PACKED_BATCH_SIZE; + continue; + } + } - for (pkt_idx = 0; pkt_idx < count; pkt_idx++) { if (unlikely(virtio_dev_rx_async_single_packed(dev, vq, pkts[pkt_idx], &num_desc, &num_buffers, &async_descs[async_descs_idx], @@ -1937,6 +1969,8 @@ virtio_dev_rx_async_submit_packed(struct virtio_net *dev, comp_pkts[num_done_pkts++] = pkts[pkt_idx]; } + pkt_idx++; + remained--; vq_inc_last_avail_packed(vq, num_desc); /* @@ -1961,13 +1995,12 @@ virtio_dev_rx_async_submit_packed(struct virtio_net *dev, */ pkt_err = pkt_burst_idx - n_pkts; pkt_burst_idx = 0; - pkt_idx++; break; } pkt_burst_idx = 0; } - } + } while (pkt_idx < count); if (pkt_burst_idx) { n_pkts = vq->async_ops.transfer_data(dev->vid, queue_id, tdes, 0, pkt_burst_idx); From patchwork Tue Apr 13 14:55:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jiang, Cheng1" X-Patchwork-Id: 91280 X-Patchwork-Delegate: maxime.coquelin@redhat.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 3849FA0524; Tue, 13 Apr 2021 17:09:41 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 08C1F160E55; Tue, 13 Apr 2021 17:09:25 +0200 (CEST) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by mails.dpdk.org (Postfix) with ESMTP id 829A2160DFD for ; Tue, 13 Apr 2021 17:09:23 +0200 (CEST) IronPort-SDR: PvZRhF6QyvUiC4Z7ZPBxuYjt8OJ83GtA7Oewz16lrTKQYsrLQyko8Ra/NIjN2OoYu+6sq7PUxr +gAR+JHdYmrA== X-IronPort-AV: E=McAfee;i="6200,9189,9953"; a="174533440" X-IronPort-AV: E=Sophos;i="5.82,219,1613462400"; d="scan'208";a="174533440" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Apr 2021 08:09:23 -0700 IronPort-SDR: rm5NQILiKb6w8hOw3QT8jmD2SX+QB4wCjXZLkFGgw8AWD5QOw+g3XAbQobsO7IHyoraHW/9yyi 35OMk9u5BfJg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,219,1613462400"; d="scan'208";a="460614355" Received: from dpdk_jiangcheng.sh.intel.com ([10.67.119.112]) by orsmga001.jf.intel.com with ESMTP; 13 Apr 2021 08:09:20 -0700 From: Cheng Jiang To: maxime.coquelin@redhat.com, chenbo.xia@intel.com Cc: dev@dpdk.org, jiayu.hu@intel.com, yvonnex.yang@intel.com, yinan.wang@intel.com, yong.liu@intel.com, Cheng Jiang Date: Tue, 13 Apr 2021 14:55:52 +0000 Message-Id: <20210413145552.41894-5-Cheng1.jiang@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210413145552.41894-1-Cheng1.jiang@intel.com> References: <20210317085426.10119-1-Cheng1.jiang@intel.com> <20210413145552.41894-1-Cheng1.jiang@intel.com> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v6 4/4] doc: add release note for vhost async packed ring 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 Sender: "dev" Add release note for the support of vhost async packed ring. Signed-off-by: Cheng Jiang --- doc/guides/rel_notes/release_21_05.rst | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/doc/guides/rel_notes/release_21_05.rst b/doc/guides/rel_notes/release_21_05.rst index 374d6d98e..eb5200669 100644 --- a/doc/guides/rel_notes/release_21_05.rst +++ b/doc/guides/rel_notes/release_21_05.rst @@ -131,6 +131,10 @@ New Features * Added command to display Rx queue used descriptor count. ``show port (port_id) rxq (queue_id) desc used count`` +* **Added support for vhost async packed ring data path.** + + Added packed ring support for async vhost. + Removed Items -------------