On 19.08.2013, at 07:55, 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. > > Signed-off-by: David Gibson <da...@gibson.dropbear.id.au> > [Mike Qiu <qiud...@linux.vnet.ibm.com>: fixed mistype which caused > ics_set_kvm_state() to fail] > Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
Reviewed-by: Alexander Graf <ag...@suse.de> Very nice! Alex
