Re: [Jack-Devel] jack dsp load calculation

On Sat, Dec 26, 2015 at 5:47 PM, Robin Gareus <[hidden]> wrote:

> On 12/26/2015 05:11 PM, Kjetil Matheussen wrote:
>
> >> On which platform is that? with JACK?
> >>
> >>
> > Just calling clock_gettime(CLOCK_MONOTONIC, &time) before and
> > after processing audio locally in Radium. CPU numbers from jack is
> > not shown in Radium.
> >
>
> Radium also runs on Windows and OSX, right?
> Do you use glib functions or directly some low-level API?
>
>
On both Windows and OSX, it will use CLOCK_MONOTONIC if it is available.
If not, it will use mach_absolute_time() on OSX, and
QueryPerformanceFrequency()
on Windows. If neither of these are available, it will use tsc.

(https://github.com/kmatheussen/radium/blob/master/audio/monotonic_timer.c,
based on this code:
http://codearcana.com/posts/2013/05/15/a-cross-platform-monotonic-timer.html
)


OSX/mach is trivial, but Windows is probably the reason why jack2
> currently does what it does..
>
> Since Windows is not my main platform, I haven't looked at the numbers
enough to say much about the stability of it. But I don't think I have
noticed anything weird.
(using Windows 7, Windows 8, and Windows 10).

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