On 13/07/2015 13:21, Michael S. Tsirkin wrote: > > Yes, this is already how virtio-scsi multiqueue is implemented. The > > speedup is noticeable. However, for virtio-blk there is a huge > > consumption of interrupt vectors in the guest, so it doesn't scale to > > multiple disks as well as virtio-scsi. > > Could you elaborate please? interrupt vector usage is generally > up to the guest, so whatever the issue is might be fixable by driver > changes alone.
Yes, but in practice neither Linux nor Windows (AFAIK) are able to share the same vector across multiple MSIs. Paolo
