DPC Latency Checker is flying above 14000 with Mixxx

Bug #994598 reported by gontie on 2012-05-04
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Mixxx
High
Unassigned

Bug Description

I have some dell laptops and with most DJ softwares like Mixvibes and Traktor they work like a charm.

The DPC latency checker show some peaks about 2000-3000 but nothing higher.

I think these software are not using the Video card ressources which doesn't seems the case of Mixxx.

To confirm this idea, i have disabled the Waveform in Mixxx and the results are indeed good. The DPC latency Checker works normal as on other DJ softwares.

So i think it could be important to have the possibility that the waveform are displayed and calculated by the CPU, not the GPU.

This could lower on many laptops the DPC latency Checker results.

Gontie.

What graphics card and driver do you have installed?

On Fri, May 4, 2012 at 9:56 AM, gontie <email address hidden> wrote:

> Public bug reported:
>
> I have some dell laptops and with most DJ softwares like Mixvibes and
> Traktor they work like a charm.
>
> The DPC latency checker show some peaks about 2000-3000 but nothing
> higher.
>
> I think these software are not using the Video card ressources which
> doesn't seems the case of Mixxx.
>
> To confirm this idea, i have disabled the Waveform in Mixxx and the
> results are indeed good. The DPC latency Checker works normal as on
> other DJ softwares.
>
> So i think it could be important to have the possibility that the
> waveform are displayed and calculated by the CPU, not the GPU.
>
> This could lower on many laptops the DPC latency Checker results.
>
> Gontie.
>
> ** Affects: mixxx
> Importance: Undecided
> Status: New
>
> --
> You received this bug notification because you are a member of Mixxx
> Development Team, which is subscribed to Mixxx.
> https://bugs.launchpad.net/bugs/994598
>
> Title:
> DPC Latency Checker is flying above 14000 with Mixxx
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/mixxx/+bug/994598/+subscriptions
>

gontie (gbonaert) wrote :

In this case, it is a Dell Latitude E6400 et and latitude D630.

Both have a Nvidia Graphic card with the latest drivers.

I can tell you more from home but i've downloaded the latest one from the dell site.

Gontie.

> Date: Fri, 4 May 2012 14:34:14 +0000
> From: <email address hidden>
> To: <email address hidden>
> Subject: Re: [Bug 994598] [NEW] DPC Latency Checker is flying above 14000 with Mixxx
>
> What graphics card and driver do you have installed?
>
> On Fri, May 4, 2012 at 9:56 AM, gontie <email address hidden>
> wrote:
>
> > Public bug reported:
> >
> > I have some dell laptops and with most DJ softwares like Mixvibes and
> > Traktor they work like a charm.
> >
> > The DPC latency checker show some peaks about 2000-3000 but nothing
> > higher.
> >
> > I think these software are not using the Video card ressources which
> > doesn't seems the case of Mixxx.
> >
> > To confirm this idea, i have disabled the Waveform in Mixxx and the
> > results are indeed good. The DPC latency Checker works normal as on
> > other DJ softwares.
> >
> > So i think it could be important to have the possibility that the
> > waveform are displayed and calculated by the CPU, not the GPU.
> >
> > This could lower on many laptops the DPC latency Checker results.
> >
> > Gontie.
> >
> > ** Affects: mixxx
> > Importance: Undecided
> > Status: New
> >
> > --
> > You received this bug notification because you are a member of Mixxx
> > Development Team, which is subscribed to Mixxx.
> > https://bugs.launchpad.net/bugs/994598
> >
> > Title:
> > DPC Latency Checker is flying above 14000 with Mixxx
> >
> > To manage notifications about this bug go to:
> > https://bugs.launchpad.net/mixxx/+bug/994598/+subscriptions
> >
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/994598
>
> Title:
> DPC Latency Checker is flying above 14000 with Mixxx
>
> Status in Mixxx:
> New
>
> Bug description:
> I have some dell laptops and with most DJ softwares like Mixvibes and
> Traktor they work like a charm.
>
> The DPC latency checker show some peaks about 2000-3000 but nothing
> higher.
>
> I think these software are not using the Video card ressources which
> doesn't seems the case of Mixxx.
>
> To confirm this idea, i have disabled the Waveform in Mixxx and the
> results are indeed good. The DPC latency Checker works normal as on
> other DJ softwares.
>
> So i think it could be important to have the possibility that the
> waveform are displayed and calculated by the CPU, not the GPU.
>
> This could lower on many laptops the DPC latency Checker results.
>
> Gontie.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/mixxx/+bug/994598/+subscriptions

RJ Ryan (rryan) wrote :

We should investigate but I think this is a natural outcome of adding more CPU usage to Mixxx.

tags: added: performance
Changed in mixxx:
importance: Undecided → High
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