spdk vhost-user-scsi vhost-kernel方案相较于virtio-scsi优化了host上的io,但是仍然存在通知的开销,guest需要通知qemu,qemu需要通知host kernel vhost-scsi,于是进一步演进出了vhost-user方案: 整体架构如上图所示,virtio backend仍然在host用户态,但是放到了qemu外部,vhost作为独立进程运行在host用户态,通过hugepage的共...
280 static void 281 vhost_user_read_cb(int connfd, void *dat, int *remove) 282 { 283 struct vhost_user_connection *conn = dat; 284 struct vhost_user_socket *vsocket = conn->vsocket; 285 int ret; 286 287 ret = vhost_user_msg_handler(conn->vid, connfd); 288 if (ret < 0) {...
这里我们可以看到Kernel vhost-scsi方案相比QEMU virtio-scsi方案在具体的SCSI命令处理时减少了数据的内存复制过程,从而提高了性能。 5.1.2.3 SPDK vhost-user-scsi 这个方案是基于Kernel vhost-scsi的进一步改进,如下图所示,虽然Kernel vhost-scsi方案在数据处理时已经没有数据的复制过程,但是当Guest有新的请求时,仍然...
280 static void 281 vhost_user_read_cb(int connfd, void *dat, int *remove) 282 { 283 struct vhost_user_connection *conn = dat; 284 struct vhost_user_socket *vsocket = conn->vsocket; 285 int ret; 286 287 ret = vhost_user_msg_handler(conn->vid, connfd); 288 if (ret < 0) {...
首先创建一个 vhost-scsi控制器。QEMU 通过/var/tmp/vhost.0来使用。 --cpumask参数标识绑定的CPU core ID,如下: ./scripts/rpc.py vhost_create_scsi_controller --cpumask 0x1 vhost.0 将Malloc0绑定到vhost.0 vhost-scsi 控制器,如下: ./scripts/rpc.py vhost_scsi_controller_add_target vhost.0 1 ...
configure a user mode network backend with ID 'str', its DHCP server and optional services -netdev tap,id=str[,fd=h][,fds=x:y:...:z][,ifname=name][,script=file][,downscript=dfile] [,br=bridge][,helper=helper][,sndbuf=nbytes][,vnet_hdr=on|off][,vhost=on|off] ...
scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk25,id=virtio-disk25-netdev tap,fd=179,id=hostnet0,vhost=on,vhostfd=183-device virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:38:e9:53,bus=pci.0,addr=0x3-chardev file,id=charserial0,path=/data/nova/instances/2178112f-...
1、首先知道下源码项目作者打补丁太猛,scsi等virtIO设备存在无法工作bug,下面文字讲解了解下就是,可不看下面内容 源码项目作者打补丁太猛,对pci.h文件 里面所有redhat virtIO设备都强制改成了8086(intel),bug就是如果你原先pve里面有虚拟机使用了virtIO等设备都用不起(比如scsi virtIO网卡,rng等等设备。用不起的原因...
Official QEMU mirror. Please see https://www.qemu.org/contribute/ for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website. - qemu/hw/virtio/vhost-user.c at master · qemu/qemu
vhost-user-scsi: Introduce vhost-user-scsi host device Jun 15, 2017 disas disas/microblaze: Add missing 'const' attributes Jul 4, 2017 docs docs: create interop/ subdirectory Jun 15, 2017 dtc @ 558cd81 dtc: Revert unintentional submodule downgrade from commit c2cabb3 Mar 16, 2017 examples...