28 Sep
2005
28 Sep
'05
7:01 p.m.
Shared memory is not the highest performance
alternative in any
operating system. When the video memory is part of system memory then
the processor the video controller fight for memory bandwidth. This
slows both down.
It's hard to find light laptop with dedicated controller at a reasonable
price :)
Is it possible to do 8in/8out and 64-sample buffers with RME Multiface
CardBus on a laptop with shared video memory?
And the only one(and expensive one) I found is with nvidia controller
(Sony Vaio VGN-S480). Not sure about nv TurboCache - is it a shared
memory solution?
Seems i want too much to be in one unit.
So, the question is: what to choose, integrated intel solution or
ati/nvidia one (in this case, nvidia is preferred, because of driver
quality).
Choose a good controller with a bit of dedicated video memory. For
purely audio apps you don't need all that much, but if you're going to
run video apps or do multimedia stuff then you'll want more.
28 Sep
28 Sep
7:21 p.m.
New subject: [linux-audio-user] latency: video card contribution
On 9/28/05, Dmitry S. Baikov <c0ff(a)konstruktiv.org> wrote:
I just sold mine on Ebay this morning. (At least I think it wasn't
shared memory. Hardly remember anymore. Anyway, it's gone...)
Shared memory
is not the highest performance alternative in any
operating system. When the video memory is part of system memory then
the processor the video controller fight for memory bandwidth. This
slows both down.
It's hard to find light laptop with dedicated controller at a reasonable
price :)
So, the question is: what to choose, integrated intel solution or
ati/nvidia one (in this case, nvidia is preferred, because of driver
quality).
Choose a good controller with a bit of dedicated video memory. For
purely audio apps you don't need all that much, but if you're going to
run video apps or do multimedia stuff then you'll want more.
Is it possible to do 8in/8out and 64-sample buffers
with RME Multiface
CardBus on a laptop with shared video memory?
Depends on the laptop but possibly. Why so stringent about 64/2? Do
you _really_ require sub-3mS?
And the only one(and expensive one) I found is with nvidia controller
(Sony Vaio VGN-S480). Not sure about nv TurboCache - is it a shared
memory solution?
Couldn't say.
Seems i want too much to be in one unit.
Possibly, but even shared memory probably won't kill you if you're
just running Ardour, etc.
- Mark
7:31 p.m.
New subject: [linux-audio-user] latency: video card contribution
It's hard to find light laptop with dedicated
controller at a reasonable
price :)
Is it possible to do 8in/8out and 64-sample buffers with RME Multiface
CardBus on a laptop with shared video memory?
all depends on the definition of "reasonable price". i can do 26x26, 64
frames/interrupt on my RME digiface cardbus with an nvidia video
controller. HP Pavilion zd7000 "desktop replacement"
--p
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linux-audio-user@lists.linuxaudio.org
2 comments
3 participants
participants (3)
-
Dmitry S. Baikov -
Mark Knecht -
Paul Davis