[Bug 10939] New: Mackie Tracktion gui is very cpu hungry

wine-bugs at winehq.org wine-bugs at winehq.org
Sat Dec 29 05:59:23 CST 2007


           Summary: Mackie Tracktion gui is very cpu hungry
           Product: Wine
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: wine-gui
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: ireneshusband at gmail.com

The audio output of Mackie Tracktion is extremely choppy when (and only when)
the GUI is visible. The choppiness is much worse at lower latencies (using
jack/wineasio), so I presume that this means the cpu is under very heavy load.

To reproduce this:

Go to http://www.mackie.com/products/tracktion3/index.html and download and
install the demo. You'll also need to have wineasio for this.

Start Jack and then Tracktion. Play the demo track "Spiralling".

What you will probably hear will be very choppy indeed. You will probably also
see a huge number of xruns.

Now switch from X to a virtual console (ctrl-alt-F1). The choppiness
disappears. On my machine (a 2.8GHz P4) when I run top from a virtual console I
find that Tracktion uses between 45% and 70% cpu time while playing
"Spiralling" at 10ms latency. However when the gui is visible it stutters badly
even with a project containing nothing but a single wav file or a single
undemanding vsti plugin.

I have experienced this problem both on an Ubuntu Gutsy system and a on
recently installed Gentoo system.

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