[mythtv-users] Will moving to DDR-400 memory from DDR-333 improve performance?
Brian J. Murrell
brian at interlinx.bc.ca
Mon Oct 23 15:33:08 UTC 2006
On Mon, 2006-23-10 at 08:16 -0700, Joe Votour wrote:
>
> It is unfortunately the bloat of Linux and X11/Qt sneaking up on us.
Indeed. QT and X11 are just all wrong for STBs. I was very
disappointed when I came to Myth to discover that I could not in any way
get it to run on DirectFB.
> If you want to trim down the memory, then you basically need to make the
> machine a dedicated MythTV machine, with a stripped down kernel for only
> your hardware and maybe even compile MythTV against uClibc.
I doubt any of that is going to make a dent in the ~370MB of VM that the
the myth(front,back}end are consuming.
> You'd also
> want to selectively compile options out of MythTV as well.
Again, a drop in the bucket I suspect. I'd hope that OpenGL could help
save us from the QT library bloat, but it will not alleviate the problem
that Myth is probably using lots of the non-gui functionality of the QT
library (which it's not going to want to give up -- understandably) and
we are always going to pay the UI code penalty of that library even
when/if we are not using a lick of it.
> Most Linux-based set-top boxes use a CPU in the range of 200MHz and 32 or
> 64MB of memory.
Uh-huh.
> Of course, they also don't use X
Uh-huh.
> (they use MicroWindows
> or something smaller than X),
DirectFB is tiny compared to X.
> Also, most people are running both the frontend and the backend on the
> same machine (although I am not). This has higher memory requirements
> than just a regular set-top box.
Do you think cableco supplied DVRs have a gig of ram in them?
b.
--
My other computer is your Microsoft Windows server.
Brian J. Murrell
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