[mythtv-users] channel changing speed, is 3 seconds normal?

[Boyd II, Willy]

>From my experiences (IIRC I recently posted this, maybe it was on the Dev
list..) the filesystem change may not help much at all.  I get a consistent
4+ seconds, never under.  This is with 2gb ringbuffer-only partition on XFS,
*shared* drive with the OS also, standalone 1GHz Athlon and pvr250.  I'd be
interested in knowing the setup, including filesystem type & whether or not
it's a dedicated drive, of those who've reported 1-2 second channel changes.

- Willy

-----Original Message-----
From: Sergio M. Ammirata [mailto:ammirata at econointl.com] 
Sent: Tuesday, September 30, 2003 7:05 AM
To: 'Discussion about mythtv'
Subject: RE: [mythtv-users] channel changing speed, is 3 seconds normal?


There is a long thread about this on the developers list and they were
suggesting that the delay came from the deletion and recreation of the
ringbuffer when the channel was changed. That is why they suggested using
either reiserfs or xfs.

I am trying to find out what the average channel change speed for other
people to see if my setup is configured optimally or not. 3 seconds seems a
bit high to me.

Sergio

> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org [mailto:mythtv-users- 
> bounces at mythtv.org] On Behalf Of Mark Edwards
> Sent: Monday, September 29, 2003 10:35 PM
> To: Discussion about mythtv
> Subject: Re: [mythtv-users] channel changing speed, is 3 seconds
normal?
> 
> guessing that this relates to the ringbuffer in mythbackend. The
channel
> is
> probably changed instantly, but the front-end doesn't see the new data 
> until the ringbuffer gets around to supplying it. Guess that a fix for 
> this would
> be to reset the ringbuffer pointer when the channel changes, but I
have
> absolutely _no_ idea what effect this would have on other parts of the 
> app..
> 
> Mark
> ----- Original Message -----
> From: "Sergio M. Ammirata" <ammirata at econointl.com>
> To: "'Discussion about mythtv'" <mythtv-users at mythtv.org>
> Sent: Tuesday, September 30, 2003 12:24 PM
> Subject: [mythtv-users] channel changing speed, is 3 seconds normal?
> 
> 
> > I followed a thread regarding slow channel changing speed. That
thread
> > suggested using either reiserfs or xfs for the cache partition. I
tried
> > both and it takes about 3 seconds to change to another channel in 
> > either. Is this normal?
> >
> > Is there any way to speed it up?
> >
> > I am using a pundit with a custom OS build. My CPU while watching
live
> > TV is under 2%. I have a WD 160HD with DMA enabled.
> >
> > Thanks in advance,
> >
> > Sergio Ammirata
> >
> >
> >
> 
> 
>
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