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 Forum index » Advanced Topics » Additional Software (PETs, n' stuff) » Multimedia
Reducing latency with nice, rtprio & memlock
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darkcity


Joined: 23 May 2010
Posts: 2435
Location: near here

PostPosted: Wed 15 Feb 2012, 08:09    Post subject:  Reducing latency with nice, rtprio & memlock  

I watched a youtube about setting up real time audio on ubuntu-

they recommended adding three commands in profile setup-

rtprio 99
memlock unlimited
nice -10

it was in a file called some thing like /etc/security/limits.conf

puppy doesn't have this file, but it is possible to use the nice command.

setting a negative nice means the program will hog the resource, which is
what you want your audio progs to do-

for example run jack with a negative nice

Code:
nice --10 qjackctl


is there any Puppy equivalent to

rtprio 99
memlock unlimited

these commands aren't recognised in the terminal

Twisted Evil

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trapster


Joined: 28 Nov 2005
Posts: 1999
Location: Maine, USA

PostPosted: Wed 15 Feb 2012, 13:29    Post subject:  

See Here
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trapster
Maine, USA

Asus eeepc 1005HA PU1X-BK
Frugal install: Puppeee4.31 + 1.0, Puppy4.10 + Lupu52
Currently using Slacko AND lupu52 w/ fluxbox
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darkcity


Joined: 23 May 2010
Posts: 2435
Location: near here

PostPosted: Thu 16 Feb 2012, 20:44    Post subject:  

Thanks for your answer.

I;ve just spent an age looking at the Arguments for and against ALSA /OSS
http://insanecoding.blogspot.com/2009/06/state-of-sound-in-linux-not-so-sorry.html

has latencytop been packaged for puppy?
http://latencytop.org/

Twisted Evil Idea
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Aitch


Joined: 04 Apr 2007
Posts: 6825
Location: Chatham, Kent, UK

PostPosted: Thu 16 Feb 2012, 22:22    Post subject:  

For real low latency, realtime kernel, as done by l0wt3ch for Studio 3/4

Aitch Smile
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darkcity


Joined: 23 May 2010
Posts: 2435
Location: near here

PostPosted: Fri 17 Feb 2012, 06:38    Post subject:  

yep, I've heard Studio 3.3 is a good solution for many. However it doesn't handle pup save files in a standard way and Studio 4 is no longer community developed.

Cool

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-_-

Joined: 10 Feb 2012
Posts: 45

PostPosted: Sat 18 Feb 2012, 18:16    Post subject:  

I personally prefer Puppy especially as this overheating HP laptop of mine keeps itself cooler with Puppy than with the factory installed Vista. Things change radically with a realtime kernel, so unfortunately I have to avoid using Puppy Studio no matter how works-out-of-the-box version it is...
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Lothar


Joined: 02 Jun 2011
Posts: 22

PostPosted: Sat 18 Feb 2012, 21:11    Post subject:  

.
Last edited by Lothar on Thu 31 Oct 2013, 01:28; edited 2 times in total
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darkcity


Joined: 23 May 2010
Posts: 2435
Location: near here

PostPosted: Sun 19 Feb 2012, 05:42    Post subject:  

are the following commands just part of PAM http://en.wikipedia.org/wiki/Linux_PAM

rtprio 99
memlock unlimited

?

Cool
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Aitch


Joined: 04 Apr 2007
Posts: 6825
Location: Chatham, Kent, UK

PostPosted: Sun 19 Feb 2012, 06:23    Post subject:  

Laughing Laughing If only walking with women were as easy. Wink

Aitch Smile
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