Re: [Qemu-devel] Slow inbound traffic on macvtap interfaces

2012-08-30 Thread Richard Davies
Chris Webb wrote: > I found that on my laptop, the single change of host kernel config > > -CONFIG_INTEL_IDLE=y > +# CONFIG_INTEL_IDLE is not set > > is sufficient to turn transfers into guests from slow to full wire speed I am not deep enough in this code to write a patch, but I wonder if macvtap

Re: [Qemu-devel] Slow inbound traffic on macvtap interfaces

2012-08-30 Thread Michael S. Tsirkin
On Thu, Aug 30, 2012 at 09:20:57AM +0100, Richard Davies wrote: > Chris Webb wrote: > > I found that on my laptop, the single change of host kernel config > > > > -CONFIG_INTEL_IDLE=y > > +# CONFIG_INTEL_IDLE is not set > > > > is sufficient to turn transfers into guests from slow to full wire spee

Re: [Qemu-devel] Slow inbound traffic on macvtap interfaces

2012-08-29 Thread Chris Webb
Chris Webb writes: > I'm experiencing a problem with qemu + macvtap which I can reproduce on a > variety of hardware, with kernels varying from 3.0.4 (the oldest I tried) to > 3.5.1 and with qemu[-kvm] versions 0.14.1, 1.0, and 1.1. > > Large data transfers over TCP into a guest from another mac

Re: [Qemu-devel] Slow inbound traffic on macvtap interfaces

2012-08-16 Thread Michael S. Tsirkin
On Thu, Aug 16, 2012 at 03:27:57PM +0100, Chris Webb wrote: > "Michael S. Tsirkin" writes: > > > On Thu, Aug 16, 2012 at 10:20:05AM +0100, Chris Webb wrote: > > > > > For example, I can run > > > > > > ip addr add 192.168.1.2/24 dev eth0 > > > ip link set eth0 up > > > ip link add link eth

Re: [Qemu-devel] Slow inbound traffic on macvtap interfaces

2012-08-16 Thread Chris Webb
"Michael S. Tsirkin" writes: > On Thu, Aug 16, 2012 at 10:20:05AM +0100, Chris Webb wrote: > > > For example, I can run > > > > ip addr add 192.168.1.2/24 dev eth0 > > ip link set eth0 up > > ip link add link eth0 name tap0 address 02:02:02:02:02:02 type macvtap > > mode bridge > > ip l

Re: [Qemu-devel] Slow inbound traffic on macvtap interfaces

2012-08-16 Thread Michael S. Tsirkin
On Thu, Aug 16, 2012 at 10:20:05AM +0100, Chris Webb wrote: > I'm experiencing a problem with qemu + macvtap which I can reproduce on a > variety of hardware, with kernels varying from 3.0.4 (the oldest I tried) to > 3.5.1 and with qemu[-kvm] versions 0.14.1, 1.0, and 1.1. > > Large data transfers

[Qemu-devel] Slow inbound traffic on macvtap interfaces

2012-08-16 Thread Chris Webb
I'm experiencing a problem with qemu + macvtap which I can reproduce on a variety of hardware, with kernels varying from 3.0.4 (the oldest I tried) to 3.5.1 and with qemu[-kvm] versions 0.14.1, 1.0, and 1.1. Large data transfers over TCP into a guest from another machine on the network are very sl