Re: Is there a 1GB memory ceiling for vm_allocate?
Re: Is there a 1GB memory ceiling for vm_allocate?
- Subject: Re: Is there a 1GB memory ceiling for vm_allocate?
- From: "Michael B. Johnson" <email@hidden>
- Date: Tue, 23 Jan 2007 15:16:03 -0800
On Jan 23, 2007, at 2:52 PM, John Bullitt wrote:
On Jan 23, 2007, at 5:32 PM, Shawn Erickson wrote:
The VM size isn't the issue really the issue... 32b tasks have a 4
GiB
address space.
...
Thanks Shawn. That's a very helpful and clear explanation.
I'm still a bit puzzled, though. Do you know how other 32-bit apps
handle long vectors? For example, sound or video editing tools that
can be used to edit long (hour-long, multi-tracked, multi-GB-sized)
chunks of data? Are they just paging small chunks of data to and
from the hard disk?
Probably. Or doing a wide variety of very sophisticated things...
A lot of "multi-media" app design is about careful caching and memory
management. The naive approach rarely gives you what you want, and
what users have come to expect - the bar is pretty high these days...
--> Michael B. Johnson, PhD
--> http://homepage.mac.com/drwave (personal)
--> http://xenia.media.mit.edu/~wave (alum)
--> MPG Lead
--> Pixar Animation Studios
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