[PD] pd and multi-core processors

[tim vets]

2010/4/5 cyrille henry <ch at chnry.net>

>
>
> tim vets a écrit :
>
>
>>
>>    tim vets a écrit :
>>
>>        has anyone been using pd~ successfully ?
>>
>>    yes
>>
>>        I am trying it out, but i get very poor results.
>>        It seems like a patch loaded with pd~ is a lot heavier than the
>>        same loaded as a regular abstraction (DIO errors, see also my
>>        message "pd~ and DIO errors").
>>        I assumed it would run on another processor core...but does it?
>>
>>    if your OS can deal with multiple CPU, then it should run the pd and
>>    pd~ process on 2 different core.
>>
>>
>> Ok, I have no idea id ubuntu-studio Hardy supports it...
>>
> yes, linux does suport multiple processor
> system / administration / system monitor
> you should see both processor used.
>
>
> hi Cyrille,
With my patch open i get these values (average):
cpu1 60% cpu2 60% cpu3 11% cpu4 2%
Then, when I open a pd~ patch:
cpu1 80% cpu2 80% cpu3 40% cpu4 3%
so, still plenty of overhead on the 4th core, but it doesn't seem to be
used.
soundwise, I get fast and regular clackles.
...sounds like a squarewave based amplitude modulator...
The ubuntu I use is an image of an old installation that was originally
installed on a single core machine.
Does that matter ?
gr,
Tim

c
>
>
>>
>>        Is there a way to check this?
>>
>>    depend on your OS.
>>
>>
>> ubuntu
>>
>
>
>> gr,
>> Tim
>>
>>
>>    cyrille
>>
>>        thanks!
>>
>>
>>        2010/4/5 Jaime Oliver <jaime.oliver2 at gmail.com
>>        <mailto:jaime.oliver2 at gmail.com> <mailto:jaime.oliver2 at gmail.com
>>
>>        <mailto:jaime.oliver2 at gmail.com>>>
>>
>>
>>           hey vedran,
>>           pd~ is a way of opening another instance of pd from within a
>>        patch.
>>
>>           ideally you want gem and sound on separate instances
>>        (connected via
>>           udp, pd~ or some other way). each of these processes will use
>> one
>>           processor.
>>
>>           nicely enough, pd's graphical interface and the actual
>>        process, are
>>           separate threads, so you (or more precisely your OS) might
>>        have them
>>           in separate processors if needed.
>>
>>           for sound, you can create objects in faust and make
>> multithreaded
>>           audio externals.
>>
>>           other than that, the processes in a patch are single threaded.
>>
>>           J
>>
>>
>>
>>           On Mon, Apr 5, 2010 at 2:59 AM, vedran
>>        <vedran.kolac at gmail.com <mailto:vedran.kolac at gmail.com>
>>           <mailto:vedran.kolac at gmail.com
>>        <mailto:vedran.kolac at gmail.com>>> wrote:
>>
>>               Hi!
>>               can someone tell me if one instance of pd (with gem) can use
>>               more than one core on multi-core processor?
>>
>>
>>
>>
>>               .....................................................
>>               vedran kolac
>>               .....................................................
>>               gTalk - vedran.kolac at gmail.com
>>        <mailto:vedran.kolac at gmail.com> <mailto:vedran.kolac at gmail.com
>>
>>        <mailto:vedran.kolac at gmail.com>>
>>
>>               .....................................................
>>               skype - vedrankolac
>>               .....................................................
>>               +385 (0) 91 567 07 17
>>               .....................................................
>>               http://www.onoxo.net
>>               http://www.projectmoe.net
>>               .....................................................
>>
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>>
>>           --     Jaime E Oliver LR
>>
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