Re: [LAU] dualcore and audio software

On Fri, May 01, 2009 at 11:15:44PM +0200, Arnold Krille wrote:
> Hi,
>
> On Friday 01 May 2009 19:38:53 Atte Andr? Jensen wrote:
> > Arnold Krille wrote:
> > > Both use threads to split their work, again there is no reason they have
> > > all their threads running on the same core. In fact one of the reasons to
> > > use threads is to make use of multiple cores within one app.
> > But doubling the load (for instance by adding more voices to ams) makes
> > *both* threads rise by (about) 100%. Wouldn't you expect for instance
> > gui threads to stay the same.
>
> I looked at your screenshot. As I am not familiar with your [ah]top, only with
> plain old top: 1) It reports different TIME+ values for the different threads.
> So they are basically not doing the same which is a good thing but maybe 2)
> your top has a problem with CPU% with multiple threads and reports the apps
> total for each thread...
>
> > Other cpu heavy processes seem to use only
> > one core, for instance building stuff from source. Also...
>
> Here building stuff from source uses 10 of 8 cores. "-j X" is your friend and
> rule of thumb says that X should be number_of_cores+1 to keep your room warm.
>

It has been a while since I set up my dual-core system, but IIRC there was some kind of load-distributing daemon which I had to turn off in order to get audio to work properly.

-ken
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Received on Sun May 3 16:15:01 2009