对虚拟机中I/O的加速,主要是指在Linux系统下QEMU/KVM作为Hypervisor管理虚拟机的场景,使用vhost交互协议,实现基于共享内存通道的高效vhost用户态Target。如vhost SCSI/blk/NVMe Target,从而加速虚拟机中virtio SCSI/blk及Kernel Native NVMe协议的I/O驱动。其主要原理是减少了VM中断等事件的数目(如interrupt、VM_EXIT)...
Expand Up@@ -441,7 +441,9 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp) virtio_err: g_free(s->vhost_vqs); s->vhost_vqs=NULL; g_free(s->inflight); s->inflight=NULL; for(i=0;inum_queues;i++) { virtio_...
在qemu 2.9的前端virtio和dpdk17.05的后端vhost-user构成的虚拟队列中,会率先通过socket建立连接,将qemu中virtio的内存布局传给vhost,vhost收到包(该消息机制有自己的协议,暂称为msg)后,分析其中的信息,这里面通信包含一套自己写的协议。包含以下内容,均是在刚建立连接时候传递的: staticconstchar*vhost_message_str[...
定义在dpdk-18.08/lib/librte_vhost/socket.c 1023 int 1024 rte_vhost_driver_start(const char *path) 1025 { 1059 if (vsocket->is_server) 1060 return vhost_user_start_server(vsocket); 1061 else 1062 return vhost_user_start_client(vsocket); 1063 } vhost_user_create_server调用vhost_user_ser...
netdev_dpdk_vhost_construct定义在文件openvswitch-2.9.2/lib/netdev-dpdk.c 1058 static int 1059 netdev_dpdk_vhost_construct(struct netdev *netdev) 1060 { 106
qemu侧 vhost_dev_init--- vsock也有 hw/block/vhost-user-blk.c:318: ret = vhost_dev_init(&s->dev, &s->vhost_user, VHOST_BACKEND_TYPE_USER,0); hw/virtio/vhost-vsock.c:345:ret = vhost_dev_init(&vsock->vhost_dev, (void*)(uintptr_t)vhostfd, hw...
qemu vhost进程 绑核 qemu环境搭建 linux内核编程-qemu环境搭建 1.背景 最近想学习linux内核和驱动开发,但是不想买开发板,其实我觉得买了也买时间玩耍。以前读书的时候买过2440,后面到杭州买了6410和4412,买的时候兴致勃勃,买了之后新鲜了两天,由于各种原因还是放弃了,现在看到有虚拟环境,工作之余希望可以学习一下...
cache=none -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -chardev socket,id=charnet0,path=/var/run/openvswitch/vhuc26fd3c6-4b -netdev vhost-user,chardev=charnet0,queues=8,id=hostnet0 -device virtio-net-pci,mq=on,vectors=...
.require(have_vhost_user, error_message: 'vhost_user_blk_server requires vhost-user support') \ .disable_auto_if(not have_tools and not have_system) \ .allowed() if get_option('fuse').disabled() and get_option('fuse_lseek').enabled() ...
Patch0149: qemu-img-block-dont-blk_make_zero-if-discard_zeroes-.patch Patch0150: vhost-user-Add-support-reconnect-vhost-user-socket.patch Patch0151: vhost-user-Set-the-acked_features-to-vm-s-featrue.patch Patch0152: vhost-user-add-vhost_set_mem_table-when-vm-load_setu.patch Patch01...