On 17/02/2015 05:44, mad Engineer wrote: > Thanks for the response. > Can a vm process create any number of extra threads based > on i/o requirement ,or is there any relation between number of VCPU > allowed and these extra threads. No, there is not relation. The I/O threads are created by QEMU, which is a userspace program that uses KVM. Different implementations could do I/O in a different way. Alternatively, QEMU itself can use the Linux AIO API. In that case it still creates threads to do fdatasync, but not to do read/write. > I hope these threads are for disk i/o and for network it uses > vhost-'pid' process. For network it can use vhost or do everything into the main thread of QEMU. Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
