Hello Michael, On 12/12/2012 06:48 PM, Michael S. Tsirkin wrote: > Deleting a GSI isn't necessary: it is enough > to stop using it. Delay flush until an entry is used. > > Signed-off-by: Michael S. Tsirkin <m...@redhat.com> > --- > kvm-all.c | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/kvm-all.c b/kvm-all.c > index 3bc3347..fb3180d 100644 > --- a/kvm-all.c > +++ b/kvm-all.c > @@ -991,8 +991,6 @@ void kvm_irqchip_release_virq(KVMState *s, int virq) > } > } > clear_gsi(s, virq); > - > - kvm_irqchip_commit_routes(s); > } > > static unsigned int kvm_hash_msi(uint32_t data) >
I tried this patch with vhost-blk with qemu-1.3.0 6d6c9f59ca1b1a76ade7ad868bef191818f58819. Without the drop of msix_fire_vector_notifier in msix_handle_mask_update hack Before: ~20K IOPS After: ~35K IOPS With the drop of msix_fire_vector_notifier in msix_handle_mask_update hack Before: ~197K IOPS After: ~197K IOPS -- Asias
