将晦涩难懂的技术讲的通俗易懂
发布时间:2022-06-04 14:26:30
vhost前后端(vhost_net/virtio_net)转发流程详解 ——lvyilong316 说明:本系列文章是早些年读linux kernel3.10代码时写的,现在为了查阅方便作为记录。 vhost net 的目的是为了避免在host kernel上做一次qemu的调度,提升性能。让vm的数据报在 host的内核就把报文发送出去。 vhost_n.........【阅读全文】
吻的感觉适2025-07-18 23:22
https://txc.qq.com/products/762843/blog/2022630
https://txc.qq.com/products/762814/blog/2022624
https://txc.qq.com/products/762833/blog/2022632
https://txc.qq.com/products/762839/blog/2022631
https://txc.qq.com/products/762835/blog/2022633
https://txc.qq.com/products/762845/blog/2022634
https://txc.qq.com/products/762810/blog/2022636
https://txc.qq.com/products/762848/blog/2022637
https://txc.qq.com/products/762843/blog/2022638
https://txc.qq.com/products/762814/blog/2022639
https://txc.qq.com/products/762839/blog/2022640
https://txc.qq.com/products/762833/blog/2022642
https://txc.qq.com/products/762810/blog/2022644
https://txc.qq.com/products/762843/blog/2022645
https://txc.qq.com/products/762814/blog/2022647
https://txc.qq.com/products/762833/blog/2022648
https://txc.qq.com/products/762843/blog/2022650
zf8292024-11-13 13:41
zf829:您好,请教大神一个问题,设备直通给VM时,中断到底会不会导致VM_EXIT吗,如果会,那VIRTIO直通时还会导致IO性能下降吧?“当透传设备产生中断时,vfio_msihandler ISR执行,该函数不做实际的服务程序处理,仅仅通过eventfd_signal激活irqfd_inject,然后最终调用deliver_posted_interrupt向虚机注入中断,中断号即为虚机配置透传设备时的中断号。” 这段描述在代码上我也仔细看了,逻辑肯定是对的,但另一方面我还是不确定中断到底会不会导致VM_EXIT
这里的中断主要是指数据包收发的中断
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