On Fri, 19 Jun 2009 11:40:14 pm Herbert Xu wrote: > > On the other hand, we're underutilizing the queue to avoid it. I find > > that a little embarrassing. > > Here's why I think this is not an issue. If your NIC is high > bandwidth then your ring is going to have to be huge so the > amount that is underutilised (a 64K packet) is tiny. If your > NIC is low bandwidth then this is where you often need QoS and > in that case you do *NOT* want to fully utilise the HW queue.
Well, we leave that up to the NIC designer. It's retro-justification for throwing away a few percent of the queue, but the QoS issue is even more in the noise. But I will give in now and change virtio_net to use this substandard API :( Thanks, Rusty. _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linux-foundation.org/mailman/listinfo/virtualization
