Benjamin Herrenschmidt wrote:
On Wed, 2007-08-22 at 16:25 +1000, Rusty Russell wrote:
On Wed, 2007-08-22 at 08:34 +0300, Avi Kivity wrote:
Zachary Amsden wrote:
This patch provides hypercalls for the i386 port I/O instructions,
which vastly helps guests which use native-style drivers. For certain
VMI workloads, this provides a performance boost of up to 30%. We
expect KVM and lguest to be able to achieve similar gains on I/O
intensive workloads.
Won't these workloads be better off using paravirtualized drivers?
i.e., do the native drivers with paravirt I/O instructions get anywhere
near the performance of paravirt drivers?
This patch also means I can kill off the emulation code in
drivers/lguest/core.c, which is a real relief.
Hrm... how do you deal with X doing IOs ?
Ben.
We have an X driver that does minimal performance costing operations.
As we should and will have for our other drivers.
Zach
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