[mythtv-users] Jumpy playback with PVR-250?

[Scott Pouliot]

Yup...tried that one.  Slowed drive access from 56MB/sec down to 13MB/sec
Not a good sign  ;-) 

-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Lance Tost
Sent: Friday, January 16, 2004 4:27 PM
To: Discussion about mythtv
Subject: RE: [mythtv-users] Jumpy playback with PVR-250?

On Fri, 16 Jan 2004, Scott Pouliot wrote:
> Nvidia drivers are installed and in use....no change
> 
> Nice -10 mythfrontend...no change  :-(


Was hdparm -d1 already mentioned?


> 
> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of David jeske
> Sent: Friday, January 16, 2004 1:46 PM
> To: Discussion about mythtv
> Subject: Re: [mythtv-users] Jumpy playback with PVR-250?
> 
> -- Scott Pouliot wrote:
> > Alright....well it's definitely not a CPU issue then. I've got a 
> > console window running on Desktop 1 in KDE...and Myth playing Live TV 
> > on Desktop 2. I can hear it skipping, but the CPU usage is as follows:
> >
> > 2.7% user 1.7% system 0.0% nice 0.0% iowait 96.6% idle
> 
> When I first brought up mythtv, it would stutter once every 2-3 minutes,
> even though it was 80% idle.
> 
> I just changed the command I used to run the frontend to:
> 
> nice -10 mythfrontend
> 
> I think some of the services running as root (i.e. mysql,
> mythbackend) like to take extra cpu time, even when they don't need it to
> remain real-time. The frontend on the other hand needs higher priority
> scheduling because it has to do work on a strictly periodic basis.
> See if boosting the priority of the frontend fixes your problem.
> 
> 

-- 
Lance Tost <ltost at pobox.com>