[PD] OS X performance

[doktorp]

sudo renice -20 <pd process id goes here> ?

doktorp

http://homepage.mac.com/doktorp/
On Jul 28, 2004, at 8:27 AM, shree wrote:

> i have to disagree on this
> the easiest way i was able to increase performance on a G5 that i have 
> in installation right now is to enable the root account
> at least on a g5 with GEM i saw 10-15% improved performance
>
>
>
> On Tuesday, July 27, 2004, at 06:39  PM, chris clepper wrote:
>
>> On Jul 26, 2004, at 10:47 PM, Mirko Petrovich wrote:
>>
>>> Hi all,
>>>
>>> I'm a Linux user an I'm very happy with pd performance in my desktop 
>>> (PIII 800MHz). Yesterday I tried pd 0.37-1 from Miller's site in a 
>>> Powerbook G4 (1GHz). I compared the cpu usage with patch 
>>> 08.convobros.pd and I saw a big difference. In the Linux system it 
>>> uses about 0.1% and in the G4 about 20%. Why this big difference ?
>>
>> I just looked at the patch and profiled it.  My 1Ghz laptop used 
>> about 13% CPU as measured by top.  The 0.1% number looks pretty bogus 
>> to me as the P3 is hardly a floating point monster and roughly 
>> equivalent to a PPC 7450 clock for clock.  I have noted discrepancies 
>> between top and the real-world on x86 chips in the past (tasks that 
>> obviously take lots of time to complete show up as near zero CPU 
>> load).
>>
>>> Should I use a G4 optimized pd
>>
>> The main code for Pd has little to no work for OSX and the PPC apart 
>> from making it run.  Thomas Grill had some Altivec code for the 
>> really basic stuff like the arithmetic objects that I looked at a 
>> while ago, but I don't know the status of that (devel branch?).  If 
>> someone did convert Pd to use fftw then the situation will be much 
>> improved as long as the Altivec code is properly built.
>>
>>> or should I tweak the OSX system ?
>>
>> Contrary to popular internet claims, there are not really any OSX 
>> system 'tweaks' to improve performance.  The best, and really only, 
>> way to make applications run better is to write better code.
>>
>> For example:
>>
>>> I tried some Gem patches too, and G4 performed a lot better
>>
>>
>>> (excepting the nVidia bug).
>>
>> Maybe that will get fixed at some point.
>>
>> cgc
>>
>>
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>>
> Patrick Pagano, B.S., M.F.A. candidate
> Research And Development Assistant
> Digital Worlds Institute
> University Of Florida
> (352) 294-2082
>
>
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