On Wed, 2011-02-02 at 12:48 +0200, Michael S. Tsirkin wrote: > Yes, I think doing this in the host is much simpler, > just send an interrupt after there's a decent amount > of space in the queue. > > Having said that the simple heuristic that I coded > might be a bit too simple. >From the debugging out what I have seen so far (a single small message TCP_STEAM test), I think the right approach is to patch both guest and vhost. The problem I have found is a regression for single small message TCP_STEAM test. Old kernel works well for TCP_STREAM, only new kernel has problem. For Steven's problem, it's multiple stream TCP_RR issues, the old guest doesn't perform well, so does new guest kernel. We tested reducing vhost signaling patch before, it didn't help the performance at all. Thanks Shirley -- 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
