[Jackit-devel] Re: [linux-audio-user] low latency

[Patrick Shirkey]

Patrick Shirkey wrote:

Sorry I missed the refernce to lockup in the previous note. It should be 
replaced with "xruns".

> So this is the revised version. Antti - could you add this to the jack 
> FAQ and I will link to it in the low latency howto.
> 
> 
> 
> To reduce the audio buffer overruns while using JACK under certain 
> conditions.  It has been found that mounting /tmp/jack as tmpfs (in RAM) 
> solves the problems that many people have experienced with LOCKUPS << here
> while using JACK.The solutions mentioned above (and below) help when 
> your /tmp directory is mounted on a journalled filesystem.
> 
>  Just put this in your /etc/fstab
> 
>   none                /tmp/jack              tmpfs     defaults      0 0
> 
> There is also a compile option to enable JACK to place its FIFOs on a 
> ram-based filesystem follows:
> ---------------------------------------------------------------
> # mkdir /mnt/ramfs
> 
> [edit /etc/fstab and add the following line]
>  none       /mnt/ramfs      tmpfs      defaults  0 0
> 
> Then use --with-default-tmpdir=/mnt/ramfs to the JACK configure
> line when you build it.  No clients need to be recompiled.
> ----------------------------------------------------------------
> 
> 


-- 
Patrick Shirkey - Boost Hardware Ltd.
Http://www.boosthardware.com
Http://www.djcj.org - The Linux Audio Users guide
========================================

Being on stage with the band in front of crowds shouting, "Get off! No! 
We want normal music!", I think that was more like acting than anything 
I've ever done.

Goldie, 8 Nov, 2002
The Scotsman