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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Jason Wang , "Michael S. Tsirkin" , Ratheesh Kannoth , Alexander Lobakin , Xuan Zhuo Subject: [PATCH net-next v4 4/4] virtio-net: support dim profile fine-tuning Date: Mon, 8 Apr 2024 11:44:30 +0800 Message-Id: <1712547870-112976-5-git-send-email-hengqi@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1712547870-112976-1-git-send-email-hengqi@linux.alibaba.com> References: <1712547870-112976-1-git-send-email-hengqi@linux.alibaba.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: X-Patchwork-Delegate: kuba@kernel.org Virtio-net has different types of back-end device implementations. In order to effectively optimize the dim library's gains for different device implementations, let's use the new interface params to fine-tune the profile list. Signed-off-by: Heng Qi --- drivers/net/virtio_net.c | 44 ++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 42 insertions(+), 2 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index cc3a281..24e8a59 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -57,6 +57,8 @@ #define VIRTNET_DRIVER_VERSION "1.0.0" +static const struct dim_cq_moder rx_eqe_conf[] = NET_DIM_RX_EQE_PROFILES; + static const unsigned long guest_offloads[] = { VIRTIO_NET_F_GUEST_TSO4, VIRTIO_NET_F_GUEST_TSO6, @@ -330,6 +332,12 @@ struct virtnet_info { struct virtnet_interrupt_coalesce intr_coal_tx; struct virtnet_interrupt_coalesce intr_coal_rx; + /* DIM profile list for different queue mode */ + struct dim_cq_moder rx_eqe_conf[NET_DIM_PARAMS_NUM_PROFILES]; + struct dim_cq_moder rx_cqe_conf[NET_DIM_PARAMS_NUM_PROFILES]; + struct dim_cq_moder tx_eqe_conf[NET_DIM_PARAMS_NUM_PROFILES]; + struct dim_cq_moder tx_cqe_conf[NET_DIM_PARAMS_NUM_PROFILES]; + unsigned long guest_offloads; unsigned long guest_offloads_capable; @@ -3588,7 +3596,7 @@ static void virtnet_rx_dim_work(struct work_struct *work) if (!rq->dim_enabled) continue; - update_moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix); + update_moder = vi->rx_eqe_conf[dim->profile_ix]; if (update_moder.usec != rq->intr_coal.max_usecs || update_moder.pkts != rq->intr_coal.max_packets) { err = virtnet_send_rx_ctrl_coal_vq_cmd(vi, qnum, @@ -3631,6 +3639,27 @@ static int virtnet_should_update_vq_weight(int dev_flags, int weight, return 0; } +static int virtnet_update_profile(struct virtnet_info *vi, + struct kernel_ethtool_coalesce *kc) +{ + int i; + + if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_VQ_NOTF_COAL)) { + for (i = 0; i < NET_DIM_PARAMS_NUM_PROFILES; i++) + if (kc->rx_eqe_profs[i].comps) + return -EINVAL; + } else { + return -EOPNOTSUPP; + } + + for (i = 0; i < NET_DIM_PARAMS_NUM_PROFILES; i++) { + vi->rx_eqe_conf[i].usec = kc->rx_eqe_profs[i].usec; + vi->rx_eqe_conf[i].pkts = kc->rx_eqe_profs[i].pkts; + } + + return 0; +} + static int virtnet_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec, struct kernel_ethtool_coalesce *kernel_coal, @@ -3657,6 +3686,10 @@ static int virtnet_set_coalesce(struct net_device *dev, } } + ret = virtnet_update_profile(vi, kernel_coal); + if (ret) + return ret; + if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_NOTF_COAL)) ret = virtnet_send_notf_coal_cmds(vi, ec); else @@ -3693,6 +3726,10 @@ static int virtnet_get_coalesce(struct net_device *dev, ec->tx_max_coalesced_frames = 1; } + if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_VQ_NOTF_COAL)) + memcpy(kernel_coal->rx_eqe_profs, vi->rx_eqe_conf, + sizeof(vi->rx_eqe_conf)); + return 0; } @@ -3872,7 +3909,8 @@ static int virtnet_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info) static const struct ethtool_ops virtnet_ethtool_ops = { .supported_coalesce_params = ETHTOOL_COALESCE_MAX_FRAMES | - ETHTOOL_COALESCE_USECS | ETHTOOL_COALESCE_USE_ADAPTIVE_RX, + ETHTOOL_COALESCE_USECS | ETHTOOL_COALESCE_USE_ADAPTIVE_RX | + ETHTOOL_COALESCE_RX_EQE_PROFILE, .get_drvinfo = virtnet_get_drvinfo, .get_link = ethtool_op_get_link, .get_ringparam = virtnet_get_ringparam, @@ -4437,6 +4475,8 @@ static void virtnet_dim_init(struct virtnet_info *vi) INIT_WORK(&vi->rq[i].dim.work, virtnet_rx_dim_work); vi->rq[i].dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; } + + memcpy(vi->rx_eqe_conf, rx_eqe_conf, sizeof(vi->rx_eqe_conf)); } static int virtnet_alloc_queues(struct virtnet_info *vi)