On 07/19/2014 02:45 AM, Benoît Canet wrote:
I think in the throttling case the number of in flight operation is limited by
the emulated hardware queue. Else request would pile up and throttling would be
inefective.
So this number should be around: #define VIRTIO_PCI_QUEUE_MAX 64 or something
like than that.
Okay, that makes sense. Do you know how much data can be written as
part of a single operation? We're using 2MB hugepages for the guest
memory, and we saw the qemu RSS numbers jump from 25-30MB during normal
operation up to 120-180MB when running dbench. I'd like to know what
the worst-case would be.
Thanks,
Chris
