On Thu, Mar 25, 2010 at 11:58:30AM +0200, Avi Kivity wrote: > On 03/25/2010 11:44 AM, Michael S. Tsirkin wrote: >> On Thu, Mar 25, 2010 at 11:40:09AM +0200, Avi Kivity wrote: >> >>> On 03/25/2010 11:15 AM, Michael S. Tsirkin wrote: >>> >>>> - Why are you using 32 bit long memory accesses for interrupts? >>>> 16 bit IO eould be enough and it's faster. This what virtio-pci does. >>>> >>>> >>>> >>> Why is 16 bit io faster? >>> >> Something to do with need for emulation to get address/data >> for pci memory accesses? >> > > pio is definitely faster than mmio (all that is needed is to set one bit > on the BAR). But 32 vs. 16 makes no difference.
Right. That's what I meant. > -- > error compiling committee.c: too many arguments to function
