Yuliang, Queue size is controlled by the driver, not the device which VPP is running as. When you launch the VM via Qemu, at the end of virtio-net-pci, specify rx_queue_size=xxx and/or tx_queue_size=xxx, where xxx is 512 or 1024.
You need Qemu-2.8.0 to specify rx_queue_size. You need to get Qemu-2.10.0 for both rx_queue_size and/or tx_queue_size support. Steven From: <vpp-dev@lists.fd.io> on behalf of Yuliang Li <yuliang...@yale.edu> Date: Wednesday, May 16, 2018 at 9:09 PM To: "vpp-dev@lists.fd.io" <vpp-dev@lists.fd.io> Subject: [vpp-dev] change vhost-user queue size Hi all, When vpp sends packets to a VM via a vhost-user interface, it will put the packet in a queue (called `rxvq` in the code). It seems the default queue size is 256 descriptors (I print rxvq->qsz_mask+1, and get 256). Is it possible to increase the queue size, and how? I followed the steps here<https://wiki.fd.io/view/VPP/Use_VPP_to_Chain_VMs_Using_Vhost-User_Interface> to setup the vhost-user interfaces and VM. Thanks, -- Yuliang Li PhD student Department of Computer Science Yale University
