Re: [Qemu-devel] [RFC PATCH v3 29/30] replay: improve replay performance

[Pavel Dovgalyuk]

> From: Paolo Bonzini [mailto:address@hidden
> On 11/01/2018 14:12, Pavel Dovgalyuk wrote:
> >> From: Paolo Bonzini [mailto:address@hidden On Behalf Of Paolo Bonzini
> >> On 11/01/2018 09:27, Pavel Dovgalyuk wrote:
> >>> +        } else {
> >>> +            qemu_notify_event();
> >>> +        }
> >>
> >> Before this patch, what would do the qemu_notify_event?
> >
> > We tried using qemu_notify_event to wake up the iothread and speedup the 
> > replay,
> > when there is no work for vcpu thread to do.
> 
> But why doesn't the iothread wake up on its own?

It will wake up by timeout. But with this change this happens sooner and replay 
goes faster.

Pavel Dovgalyuk