Nic rx queue. rx_bytes: 1462729691538 .

Nic rx queue Sep 5, 2021 · Currently I am using Ubuntu 18. Multi-queue NICs (network interface cards) are supported on all Compute Instance s that have 2 or more CPU cores (vCPUs). In the case of the igb network driver, a ring buffer is setup in RAM that points to received packets. The simplest setup uses only one receive and one transmit queue. Use the multiqueue=1 when bring up the ixgbe driver AND have the PF port linked and up before configuring the number of VFs. 4: 2015: March 7, 2022 以上命令分别给 rx queue 0 和 rx queue 1 不同的权重：6 和 2，因此 queue 0 接收到的数量更 多。注意 queue 一般是和 CPU 绑定的，因此这也意味着相应的 CPU 也会花更多的时间片在收包 上。 一些网卡还支持修改计算 hash 时使用哪些字段。 3. In answer to your question this would also apply to the ConnectX-6 To determine if the the performance decrease is due to hardware or software you should check the out_of_buffer counter. (hinic_tx. My objective is to let a client application running on a separate host to "hint" to what queue should packets be directed (i. Check the integrity of the packet headers. Hence expecting a PCAP PMD emulating RXPCAP file as RX device will have multiple RX queue is not right. Each queue can be processed by a different CPU core. I want to know the mapping between the index of RX queues and the logical number of CPU cores. I found my NIC queue is set to 60, now I need to do some experiment and disable multi-queue, I searched on the internet but very few info is present. Then, independent of the CPU, the NIC can handle incoming packets and save the payloads into those buffers in memory. Aug 12, 2024 · On the other hand, CPU 1 processes our packets after RPS for RX queue 0. g. ethtool -L [interface] combined 8 tx 0 rx 0 For granular control packet processing, but at the cost of more resources, it is recommended to use separate queues. E. DMA 技术出现后，NIC 增加了 DMA Control 功能，并将 NIC Rx/Tx queue 与 Main Memory 中的 ZONE_DMA 建立直接映射关系。当 Frames 进入 NIC Rx/Tx queue 之后，就会直接被 DMA Controller Copy 到 ZONE_DMA，这一次 Copy 完全不需要 CPU 的参与。 Mar 17, 2022 · Since the hardware only allows per-queue shaping, we enforce in the driver that one traffic class is assigned to only one queue. Increasing the TX and RX queue size helps with queuing more data for transmit and receive and helps in avoiding packet drop during high data transfer. 7. Incoming are about 300k packets per second which the RQ of the default Ubuntu 22. Saved searches Use saved searches to filter your results more quickly Jul 2, 2022 · 这意味着驱动没有实现 ethtool 的 get_channels() 方法。 可能原因：该网卡不支持 调整 RX queue 数量，不支持 RSS/multiqueue 等。 ethtool -L 可以修改 RX queue 数量（ethtool 参数 有个惯例，小写一般都是查询某个配置，对应的大写表示修改这个配置）。 Feb 18, 2023 · NICs may have multiple hardware RX and TX queues, and there are several methods which allow choosing which RX and TX queues are used for a given flow/packet, though most are focused on the RX side. set the RX descriptor for queue-0 to a larger value like 2048 or 4096 allowing more accumulation, while set queue-2 RX descriptor as 512 or 1024. In conjunction with the kernel, it sets aside some appropriate RAM, then tells the NIC about those addresses in memory. It means all packets destined to NIC RX queue [0, num_rx_queues[will be received by the AF_XDP interface, and only them. Avoiding TX queue lock contention: Transmit packet steering; 9. In E-Switch steering domain, for mirroring with sample ratio = 1 in a transfer rule, supports only RAW_ENCAP , PORT_ID , REPRESENTED_PORT , VXLAN_ENCAP , NVGRE_ENCAP in the sample actions list. The columns Jan 13, 2021 · On multiple APU4s I have, all on 4. c, hinic_tx. conf”. This queue typically is implemented as a first-in, first-out (FIFO) ring buffer ( http://en. Feb 6, 2021 · I am trying to keep track of Ipv6-Srv6 packets using simple XDP-eBPF program. Apr 23, 2016 · Can anyone tell me what command i run to determine if my 10G NIC is running in single RX-TX queue mode or multiqueue? It looks like it only has 1 RX/TX queue according to cat /proc/interrupts. 11 multi rx queue with rss "ETH_RSS_TCP | ETH_RSS_IP". Mar 19, 2021 · When using more than 32 queues on NIC Rx, the probability for WQE miss on the Rx buffer increases. We were able to run bessd and detect the mellanox port. 5 调整 RX 哈希字段 for network flows. Due to the ConnectX-6 limitations my current solution to do this is to setup a new flow rule redirecting the stream to a different NIC queue in a round-robin fashion on a given interval with an Oct 1, 2018 · $ ethtool -S enp5s0f1 | grep '[rt]x-[0-9]' tx-0. Then split a set of million of sockets into worker threads, each one using epoll() to manage events on its own socket pool. rx_packets: 165894101718 rx-0. 多 CPU 下的 Ring Buffer 处理 因为分配给 Ring Buffer 的空间是有限的，当收到的数据包速率大于单个 CPU 处理速度的时候 Ring Buffer 可能被占满 Fig. Avoiding RX queue lock contention: The SO_REUSEPORT and SO_REUSEPORT_BPF socket options; 9. tx_bytes: 10359359292618 rx-0. (hinic_rx. Oct 16, 2013 · From the PF driver (ixgbe_sriov. ethtool -G em1 tx 4096. The card is on a correct PCIe extension slot (PCIe3. I am using ixgbe version 3. 另外，time_squeeze 升高 并不一定表示系统有丢包 ，只是表示 softirq 的收包预算用完时，RX queue 中仍然有包等待处理。只要 RX queue 在下次 softirq 处理之前没有溢出，那就不会因为 time_squeeze 而导致丢包；但如果有持续且 大量的 time_squeeze，那确实有 RX queue 溢出导致 For NIC Rx flow, supports only MARK, COUNT, QUEUE, RSS in the sample actions list. The NIC distributes packets by applying a filter to each packet that assigns it to one of a small number of logical flows. 11. Freeing frags¶ Mar 23, 2022 · Use a smart NIC or FPGA: that is programmed to parse and RSS on your specific headers to RSS on multiple RX queue; Work with Intel using XXV710 (Fortville): to create DDP which can parse your specific headers as RSS on multiple RX queue. I am using a patched DPDK 22. 2. , if XPS (Transmit Packet Steering) is not enabled, how is the TX queue The network interface controller (NIC) multi-queue feature allows you to configure multiple transmit (Tx) and receive (Rx) queues on a NIC. But all packages arrvied to the same queue(qu Hard interrupts can be seen in /proc/interrupts where each queue has an interrupt vector in the 1st column assigned to it. cumulus@switch:~$ ethtool -S swp1 NIC statistics: rx_queue_0_packets: 5 rx_queue_0_bytes: 300 rx_queue_0_drops: 0 rx_queue_0_xdp_packets: 0 rx_queue_0_xdp_tx: 0 rx_queue_0_xdp_redirects: 0 rx_queue_0_xdp_drops: 0 rx_queue_0_kicks: 1 tx_queue_0_packets: 144957 tx_queue_0_bytes: 10546468 tx_queue_0_xdp_tx: 0 tx_queue_0_xdp Dec 17, 2021 · I have just added an Intel x550T2 10Gb NIC on my Debian 10 server, and noticed that I have a lot of rx_dropped errors. Aug 26, 2022 · The function will create a DPDK RX queue, and every RX queue will have a index. 6 (though I've seen the issue on other firmwares) on new kernels (at least 5. Mar 10, 2019 · 1. 注意：对于大部分驱动，修改以上配置会使网卡先 down 再 up，因此会造成丢包。请酌情 使用。 3. Is this due to NIC hardware capabilities or can you configure multiple receive ring buffers in linux p threads by queue ID NIC 1 Rx 0 NIC 1 Rx 1 NIC 2 Rx 0 NIC 2 Rx 1 thr1 NIC 1 thr2 NIC 1 thr3 NIC 2 thr4 NIC 2 Reuseport group 3 Reuseport group 4 Reuseport group 1 Sep 26, 2018 · rx_queue_0_packets: 0 rx_queue_1_packets: 1 rx_queue_2_packets: 40251934 rx_queue_3_packets: 0 rx_queue_4_packets: 6 rx_queue_5_packets: 76334041 rx_queue_6_packets: 0 rx_queue_7_packets: 1 As you see, just one rx queue is active each time. conf” will be take into account by guests booted on host. NIC 如果支持 mutiqueue 的话 NIC 会根据一个 Hash 函数对收到的数据包进行分发。 You can check the /proc/interrupts file for RSS queues on intel i211 nic Realtek RTL8125 / RTL8125B(S)(G) The RTL8125BG/RTL8125BGS supports Receive-Side Scaling (RSS) to hash incoming TCP connections and load-balance received data processing across multiple CPUs. 1 dst-port 65500 action 1 Added rule with ID 12401 server$ sudo ethtool -N eth3 flow-type udp4 dst-port 4321 It would seem that Click would > just need to quickly copy from the RX ring buffer to the TX ring buffer and > there should not be much need for intermediate queueing. Jun 30, 2015 · They tell the NIC to send specific flow to specific RX queue. I would like to know how I can distribute the load between all of the rx queues? This typically happens when the NIC is unable to split the packet at the header boundary, such that part (or all) of the payload landed in host memory. Configuring less RX-queues than TX-queues is often not possible on modern NIC hardware, as they often use what is called combined queues, which bind “RxTx” queues together. (or does the bus > speed > dictate a need for a large intermediate queue?) Additionally if I have > small > (96) tx/rx rings but a Queue >= 50, then all the pakcets maket it through. I get the NIC queue as always 1. Mar 4, 2025 · RX队列（RX Queue）：RX队列主要用于处理从网络接收到的数据包。当数据包到达网卡时，会根据一定的规则（如轮询、基于流的分配等策略）被分发到不同的RX队列中。 TX队列（TX Queue）：TX队列负责管理待发送的数据包。 Enabled by default, RSS (Receive Side Scaling), provides a good mechanism for RX load distribution as it hashes different streams to separate RX queues to spread the load evenly. (At the expense of ram ??) When your Queue element's size is too small, Poll element might queue packets too fast for ToDev to pull them from the queue due a slow NIC tx Dec 11, 2017 · Hi, I have a NIC card 82599EB 10-Gigabit. -#define NIC_PORT_RX_Q_SIZE 2048 /* Size of Physical NIC RX Queue, Max (n+32<=4096)*/ Dec 6, 2024 · Hello, Software in use: MLNX_OFED 24. It should always be recommended to set these settings to the max allowed value to avoid packet drops but more specifically: rx errors or overruns (which can happen in case of burst for example). tx_packets: 72709177633 tx-1. 0-64-generic These RX queue ring buffers are mostly set up by the NIC-driving software. Identify DPDK NIC: which can parse RAW header as defined 12. Each receive (RX) and transmit (TX) queue is assigned a unique vector that informs the interrupt handler which NIC or queue the interrupt is coming from. See full list on coverfire. That indicates non-devmem, regular TCP data that landed on an RX queue not bound to a dmabuf. 0. , some kind of client-directed receive queue load balancing). 一些网卡和驱动也支持修改 RX queue 的大小。 The above command specifies a weight of 6 for rx queue 0 and 2 for rx queue 1, pushing much more data to be processed on queue 0. Disabling the Generic Receive Offload feature on servers with high UDP traffic; 10. As part of RPS, we can see here that _netif_receive_skb_one_core calls ip_rcv, ip_local_deliver and ip_local_deliver_finish. Freeing frags¶ Oct 9, 2015 · We call this functionality: "single RX queue mode". 15 and mlx5_core. 2: Packet parser: Identify the protocol stack of the input packet. Depending on your configuration, there will usually be several RX queues (typically 1 per core) and This typically happens when the NIC is unable to split the packet at the header boundary, such that part (or all) of the payload landed in host memory. 7-k. Oct 8, 2022 · check if DPDK NIC supports multiple mempool for each queue. Jan 3, 2020 · AFAIK the DPDK code examples use a single rte_mempool for the whole application (or for all the queues of a given port). 7 and 5. rx_bytes: 12865093535024 tx-1. I want to specify distinct number of rx queue and tx queue instead of specifying queues=8 which configures 8 rx queues and 8 tx queues. e. The vendor of the system suggests me to increase the number of receive queue slots using ethtool -g → to check for Packet I/O RX & TX. Documentation Impact ¶ The documentation of the VIFs that are supporting this feature should be updated as-well as the introduced config options in “nova. Depending on your configuration, there will usually be several RX queues (typically 1 per core) and For NIC Rx flow, supports only MARK, COUNT, QUEUE, RSS in the sample actions list. The question here is: Even I have configured 1 RX queue & 2 TX queue. This would allow netmap applications to receive packets from that specific RX queue. Ideally, we want one thread per RX/TX queue/cpu, but we have no way to know after accept() or connect() on which queue/cpu a socket is managed. Some NICs will also let you adjust the fields which be used in the hash algorithm, as we’ll see now. Apr 10, 2023 · 结合 NIC RSS（Receive Side Scaling，接收侧扩展）功能，可以将多个 Rx Queues 通过硬中断绑定到不同的 CPU cores 上处理，以此均衡利用 CPU 资源并提高网络吞吐量。例如：Intel 82599 NIC 有 16 个 Queues，可以分别将每个 Queue 的中断号绑定到 16 个 CPU Cores 上。 此外，有些 NIC Apr 30, 2024 · Hi, I experience huge package loss using a ConnectX-6 Dx with jumbo frames MTU 9014. Each RX and TX queue is assigned a unique vector, which informs the interrupt handler as to which NIC/queue the interrupt is coming Apr 27, 2019 · How to change receive queue length of a network interface in Linux? How do I increase RX queue size on a netdev type erspan in an attempt to prevent RX overrun errors on it? I understand this netdev type is similar in kind to gretap (besides GRE encapsulation it also handles ERSPAN encapsulation): 如果你的网卡支持独立的 RX 和 TX 队列数量，那你可以只修改 RX queue 数量： $ sudo ethtool -L eth0 rx 8. Map the input packet to one of the known traffic flows. 254. Freeing frags¶ Jun 25, 2018 · # ethtool -S eth5 | grep rx_queue_[0-3]_packets rx_queue_0_packets: 129639 rx_queue_1_packets: 129750 rx_queue_2_packets: 130694 rx_queue_3_packets: 129922 # # cat /proc/softirqs CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 HI: 0 0 0 0 0 0 0 0 TIMER: 55481 78591 63146 71702 66375 45699 61418 47979 NET_TX: 8 2 2 145 146 145 145 2 NET_RX: 135337 129549 129860 129387 3888 3227 3679 4829 BLOCK: 1675 Apr 1, 2021 · Hello Baptiste, Thank you for posting your question on the Mellanox Community. 另外， time_squeeze 升高并不一定表示系统有丢包，只是表示 softirq 的收包预算用完时，RX queue 中仍然有包等待处理。只要 RX queue 在下次 softirq 处理之前没有溢出，那就不会因为 time_squeeze 而导致丢包；但如果有持续且 大量的 time_squeeze，那确实有 RX queue 溢出导致 Oct 10, 2010 · I can read ICMP request from second RX queue (Queue-id: 1) and forward too. The NIC multi-queue feature is designed to improve network I/O throughput and reduce latency by allowing multiple CPU cores to simultaneously process Packet I/O RX & TX. rx_bytes: 1462729691538 However, it’s far from easy to turn these total numbers into Nov 21, 2023 · The CPU has 10 cores and 20 threads, and the maximum number of queues of the network card is 32. 修改：将网卡收发队列深度修改为可配置的，设置更大的深度可以有效避免因队列满而丢包， 设置较小的深度可以降低报文的时延。一般网卡队列深度范围是5128192. I want to enabl SR-IOV and multiqueue on this NIC. 3: Flow classification: Map the input packet to one of the known traffic flows. 04 6. This will enable 2 rx and 2 tx queues per VF. May 30, 2022 · 1 简介 环形缓冲(ring buffer)是NIC处理数据包的一种通用数据结构，出现的原因是现代NIC基本使用DMA进行数据传输，作为一种高效简单[1]的数据结构，环形缓冲很 适合这种大吞吐的场景。在NIC中分成了RX Ring和TX Ring两种缓冲，分别负责接收和传输数据包。环形缓冲的使用维护 Jan 9, 2025 · TX/RX Queue Size# The NIC’s queue size dictates how many ring buffers are allocated for DMA transfer. We can see that _napi_poll runs here as well inside net_rx_action. 10, 5. The intention was to expose a minimal API which could: Open a network interface in "a single RX queue mode". Why few packets Feb 15, 2025 · I have a problem with stopping/starting VF RX/TX queues from our DPDK application. Traffic flows correctly until the first time we stop/sta Feb 19, 2025 · Current hardware settings: RX: 0 TX: 0 Other: 0 Combined: 1 # One queue has been enabled for the NIC. 网卡处理数据包流程 网卡处理网络数据流程图： 图片来自参考链接1 上图中虚线步骤的解释： 完整流程： 2. 5 调整 RX 哈希字段 for network flows Aug 24, 2023 · 处理 Rx Queue 硬中断的 CPU Core 也是随后进行处理收包的 CPU Core，如上图所示，当某个 NIC Rx Queue 收到 Frames 时，就触发自己的 IRQ，收到 IRQ 的 CPU Core 就执行 IRQ Number 对应的硬中断处理程序，最终将收包任务下发给该 Core 的 NET_RX_SOFTIRQ 实例处理（每个 Core 都有一个 NET_RX_SOFTIRQ 实例）。 The AF_XDP interface will claim NIC RX queue starting from 0, up to the requested number of RX queues (only 1 by default). wikipedia. All natural smoking aid calms cravings and helps to cleanse your body, preparing This typically happens when the NIC is unable to split the packet at the header boundary, such that part (or all) of the payload landed in host memory. Let me explain why: I am using an Intel 10G NIC of type X520, on a Dell R720 system. My OS is fedroa 18. You need to configure an equal number of RX & TX queues (in the KVM world). rx_packets: 18640137236 rx-1. If I load the driver ixgbe like this "modprobe ixgbe", then I can see the multiqueue is enabled. What I can't find, however, is the behavior if none of this is enabled. To determine if the the performance decrease is due to hardware or software you should check the out_of_buffer counter. To help prevent package drops, we recommend that you set the size to the maximum allowed value. We see that CPU 1 does not poll the virtio queue directly. 0 x8). However, it does not consider application locality. 10-0. While leaving all the other queues attached to the host network stack. また、キューからの排出率を高めることもできます。これを行うには、NIC の device weight をそれに応じて調整します。 この属性は、softirq コンテキストが CPU を放棄して再スケジュールを行う前に NIC が受信可能なフレームの最大数を指します。 Aug 23, 2019 · Hi Lenniey, rx_queue_size will define ring size of rx queue. 1 NIC Ring API in the paper for an explanation of the receive (rx) and transmit (tx) queues: NICs expose multiple circular buffers called queues or rings to transfer packets. 07 I’m using a ConnectX-6 VPI card and am wanting to spread a UDP stream’s packets across multiple NIC queues using DPDK’s rte_flow mechanism. OS: guest OS, Ubuntu 19. You can't configure 1 RX and 2 TX queues. – Brijesh Valera This typically happens when the NIC is unable to split the packet at the header boundary, such that part (or all) of the payload landed in host memory. The Logical Tx queue is not dependent on the format of the HW Send Queue. 1. For example, will the RX queue 1 be mapped to the core 1? Will the RX queue be mapped to the same index CPU core? And Is the mapping fixed or can it be changed? 处理 Rx Queue 硬中断的 CPU Core 也是随后进行处理收包的 CPU Core，如上图所示，当某个 NIC Rx Queue 收到 Frames 时，就触发自己的 IRQ，收到 IRQ 的 CPU Core 就执行 IRQ Number 对应的硬中断处理程序，最终将收包任务下发给该 Core 的 NET_RX_SOFTIRQ 实例处理（每个 Core 都有一个 May 12, 2012 · Alternative to RPS/RFS is to use hardware support for multi queue. Does this mean VF will always have at most 1 Tx/Rx pair available? If so, is there any plan to fix it? 我正在尝试理解网络驱动程序中使用的Rx和Tx描述符概念。描述符是在软件（RAM）还是硬件（网卡）中。它们如何被填充。编辑：所以在Realtek网卡驱动程序代码中，我定义了以下结构体。 Jul 9, 2005 · Depending on the traffic load and how expensive your Click configuration is, increasing your device's rx/tx queue sizes should help prevent packet drops on the device's queues. 设置 RX 和 TX 队列大小： ethtool -G em1 rx 4096. Does this mean VF will always have at most 1 Tx/Rx pair available? If so, is there any plan to fix it? The AF_XDP interface will claim NIC RX queue starting from 0, up to the requested number of RX queues (only 1 by default). 10 网络栈。 I want to set the number of RX/TX queues used by an Intel 10G NIC. If you want more rx queues th Sep 27, 2021 · 处理 Rx Queue 硬中断的 CPU Core 也是随后进行处理收包的 CPU Core，如上图所示，当某个 NIC Rx Queue 收到 Frames 时，就触发自己的 IRQ，收到 IRQ 的 CPU Core 就执行 IRQ Number 对应的硬中断处理程序，最终将收包任务下发给该 Core 的 NET_RX_SOFTIRQ 实例处理（每个 Core 都有一个 NET_RX_SOFTIRQ 实例）。 Nov 6, 2020 · The number of queues available on a port depends upon the NIC configuration and driver from OS. Avoiding listen queue lock contention; 9. Freeing frags¶ Packet I/O RX & TX: Packet reception/ transmission from/to multiple NIC ports. Packet reception/ transmission from/to multiple NIC ports. Identify the protocol stack of the input packet. c). org/wiki/Circular_buffer )—just think of it as a fixed-sized buffer. 3. This counter counts the number Oct 16, 2013 · From the PF driver (ixgbe_sriov. Tuning the device driver and NIC. 0-39 generic kernel can not handle (I can see >1M dropped packets per second on cat /proc/net/dev). 2. 6. These are initialized when the system boots or when the NIC device driver module is loaded. Each queue has an interrupt vector in the first column assigned to it. If the mlx5 driver has a parameter that helps disable it, please tell me how to do that. But when we are trying to create a PMDPort from bessctl CLI (add port PMDPort pport0 po Aug 16, 2018 · Unit tests are going to be added to ensure that the values of tx_queue_size and/or rx_queue_size updated in “nova. c, hinic_rx. A final configuration with mqprio looks like this : Most shapers use a variant of the Token Bucket Filter algorithm. 168. In answer to your question this would also apply to the ConnectX-6. Applications may receive no SO_DEVMEM_* cmsgs. You can also set it to a value that works best for your use case. com Sep 23, 2013 · Between the IP stack and the network interface controller (NIC) lies the driver queue. Dec 11, 2017 · Here are the steps to configure multiple rx queues for VFs on ixgbe for VMs with 2 or more vCPUs. 本文尝试从技术研发与工程实践（而非纯理论学习）角度，在原理与实现、监控告警、 配置调优三方面介绍内核5. Steps of Linux kernel receiving data process and the corresponding chapters in this post. For example, in our case, this is how we could pin our flows to RX queue #1 on both the server and the client: client$ sudo ethtool -N eth2 flow-type udp4 dst-ip 192. NIC Hardware Assist processing some protocol features – GRO: Generic Receive Offload – LRO: Large Receive Offload – TSO: TCP Segmentation Offload – RX check-summing = Processing of receive data integrity – “ethtool –k {ifname}” to View Features for eth0: rx-checksumming: on tx-checksumming: on scatter-gather: on Apr 10, 2022 · I am using IXGBE Nic, using dpdk 19. Feb 23, 2023 · 看到 RX 和 TX 最大是 4096，当前值为 256。队列越大丢包的可能越小，但数据延迟会增加. Provides information on TX and RX queue size and how this impacts packet drops. If yes, set queue-0 with a dedicated mbuf with a larger element and queue-1 with a mempool with smaller elements. Multiqueue Enabled: Rx Queue count=32, Tx Queue count=32 But I enable SR-IOV, load the 处理 Rx Queue 硬中断的 CPU Core 也是随后进行处理收包的 CPU Core，如上图所示，当某个 NIC Rx Queue 收到 Frames 时，就触发自己的 IRQ，收到 IRQ 的 CPU Core 就执行 IRQ Number 对应的硬中断处理程序，最终将收包任务下发给该 Core 的 NET_RX_SOFTIRQ 实例处理（每个 Core 都有一个 Hello, We are trying to run bess on a machine that has a single port Mellanox ConnectX-3 NIC. Allocate RX and TX queue memory; Enable NAPI; Register an interrupt handler; Enable hardware interrupts; Data arrives # When network data arrives at a NIC, the NIC will use DMA to write the packet data to RAM. h) hinic_dev - de/constructs the Logical Tx and Rx Queues. tx_packets: 61122861442 tx-0. ethtool or TC hardware offloads. 另外，time_squeeze 升高 并不一定表示系统有丢包 ，只是表示 softirq 的收包预算用完时，RX queue 中仍然有包等待处理。只要 RX queue 在下次 softirq 处理之前没有溢出，那就不会因为 time_squeeze 而导致丢包；但如果有持续且 大量的 time_squeeze，那确实有 RX queue 溢出导致 Contemporary NICs support multiple receive and transmit descriptor queues (multi-queue). This feature provides multiple receive (RX) and transmit (TX) queues, assigns them to different network interrupts, and balances them over multiple vCPUs. When binding the 21st AF_XDP socket, the prompt Os { code: 22, kind: InvalidInput, message: "Invalid argument" } To query interface statistics, run the ethtool -S <interface> command:. 3 调整 RX queue 的大小. No further action is required. h) Rx Queues - Logical Rx Queues that use the HW Receive Queues for receive. 5 调整 Ring Buffer 队列的权重. tx_bytes: 11351345564539 rx-1. 9, but I've seen the issue on older kernels as well), I have never manag In the output of ethtool -g you will get the "Pre-set maximums" and the "Current hardware settings" of your NIC. 1 and RedHat 4. AF_XDP zero-copy already have this dependency. Assuming all EAL threads interact only with their own RX/TX queue, is it Sep 20, 2021 · For XDP progs per RX-queue to make sense, we do need to setup NIC hardware filters to steer trafic to specific RX-queues. 04 with Linux Kernel 4. Nov 1, 2019 · See section 4. To query the current setting of the queue size: Mar 28, 2021 · Configuring NIC with 0 RX queue (TX queues only) on DPDK 21. When using more than 32 queues on NIC Rx, the probability for WQE miss on the Rx buffer increases. Flow classification. Thank you ! 以上命令分别给 rx queue 0 和 rx queue 1 不同的权重：6 和 2，因此 queue 0 接收到的数量更 多。注意 queue 一般是和 CPU 绑定的，因此这也意味着相应的 CPU 也会花更多的时间片在收包 上。 一些网卡还支持修改计算 hash 时使用哪些字段。 3. The NICs often have multiple queues for both transmitting and receiving data, and it is better to have the workloads balanced on each queue to reach the best performance. Freeing frags¶ Jan 7, 2013 · On my office server, the output of cat /proc/interrupts displays one tx queue and 5 rx queues. In our (less-RX-than-TX-CPUs) setup, this force us to configure multiple RX-queues to be handled by a single “RX” CPU. IXGBE support max 64 queues, and i used 4 queues. With that, client-to-server connectivity is working as expected. (See config via ethtool --show-channels). There are several ways to configure NIC hardware filter, e. Adjusting the rx hash fields for network flows Learn how Nic RX’s herbal ingredients can help you quit forever. RX 队列（RX Queue）：RX 队列主要用于处理从网络接收到的数据包。当数据包到达网卡时，会根据一定的规则（如轮询、基于流的分配等策略）被分发到不同的 RX 队列中。 TX 队列（TX Queue）：TX 队列负责管理待发送的数据包。 I would like to contribute a new tool netqtop for monitoring traffic loads on each queue of a specified network interface. The kernel initializes these vectors when the system boots or when a user loads the NIC driver module. On reception, a NIC can send different packets to different queues to distribute processing among CPUs. Following is environment details. Tuning the device driver This typically happens when the NIC is unable to split the packet at the header boundary, such that part (or all) of the payload landed in host memory. With combined queues, TX and RX queues are shared with a single IRQ. Poll mode drivers (PMDs) for Intel 1 GbE/10 GbE NICs. The Logical Rx queue is not dependent on the format of the HW Receive Queue. 0 DPDK 24. 14 kernel. 3. If the values of the two Combined fields are the same, NIC multi-queue has been enabled. Software And Drivers. Packet parser. The principle is the following : Each queue has a Token Bucket, with a limited capacity. Oct 15, 2017 · Since Linux has RSS enabled, it uses one NIC receive queue for each core in the system (16 cores and therefore 16 RX queues). The PF always return 1 as max Tx/Rx queue number, regardlss of VMQ/RSS parameters. qoe vznnj jqvfg ycuj enoags hifcv ougmpk mdyeh eojvw byih lauq snucyeo pskzk jgodey iaigg