On Wed, Jun 05, 2013 at 05:39:58PM +1000, Alexey Kardashevskiy wrote: > From: David Gibson <da...@gibson.dropbear.id.au> > > Recent (host) kernels support emulating the PAPR defined "XICS" interrupt > controller system within KVM. This patch allows qemu to initialize and > configure the in-kernel XICS, and keep its state in sync with qemu's XICS > state as necessary. > > This should give considerable performance improvements. e.g. on a simple > IPI ping-pong test between hardware threads, using qemu XICS gives us > around 5,000 irqs/second, whereas the in-kernel XICS gives us around > 70,000 irqs/s on the same hardware configuration. > > [Mike Qiu <qiud...@linux.vnet.ibm.com>: fixed mistype which caused > ics_set_kvm_state() to fail] > Signed-off-by: David Gibson <da...@gibson.dropbear.id.au> > Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
I think this one also needs the headers update for qemu first, yes?
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
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