David,
That drops the idle cycle down nicely on Windows 10 to 0% and the system
still seems responsive.

If I hold a mouse button down it jumps up to around 25% cpu usage again.
That seems a little excessive

Best,
Karl



On Sun, Apr 12, 2020 at 9:59 PM David T. Lewis <lewis at mail.msen.com> wrote:

> On Sun, Apr 12, 2020 at 10:42:01AM -0700, tim Rowledge wrote:
> >
> >
> > > On 2020-04-12, at 8:57 AM, Vanessa Freudenberg <vanessa at codefrau.net>
> wrote:
> > >
> > >
> > > We did add delays to the menu loops etc. many years ago. Sounds like
> ScreenController needs that, too?
> >
> > Looks like it; I think the problem is that the controlLoop is basically
> > do I want control
> > while true
> > do control stuff
> > AND only the `do control stuff` has any attempt at yielding etc. So in a
> plain empty screen we end up with a furious whizzing around of trying to
> find an active controller, not finding one (because the ScreenController is
> not active unless a mouse button is pressed) and looping through all that
> ControlManager stuff that wants to find something, anything,
> please-I'm-bored, to do.
> >
>
> This seems right. The ScreenController does call interActivityPause in
> the controlLoop, but that does not seem to be actually happening when
> the screen is blank and there is nothing to do.
>
>
> > So maybe  something something, only screencontroller in the list of
> scheduled controllers, something, interactivityPause, something something?
>
> Maybe in ScheduledControllers (the ControlManager instance). If there
> are no windows open, then there is only one entry in the list of
> scheduledControllers, and I don't think that interactivityPause is getting
> called in that case. So as you say maybe the control manager needs
> to figure out when there is nothing for it to be doing.
>
> I put a plausible fix in the inbox in ST80-dtl.250.
>
> Dave
>
>
>
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