[haiku-development] Re: Writing Device Drivers - CRAM - Problem Malloc()
- From: Earl Pottinger <earl_colby_pottinger@xxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Mon, 22 Aug 2011 12:40:07 -0700 (PDT)
Writing Device Drivers - CRAM - Problem Malloc()
> > <earl_colby_pottinger> wrote:
> > Does malloc() have a lot of overhead or am I doing something wrong?
> > I started with 1MB allocations, but even on a 3GB machine with
> > no applications I get allocation errors after 1.6GB of allocation.
> > Why?
> Rene Gollent wrote:
> You're most likely exhausting your virtual address space. Bear in
> mind, the address space is split in half where 2GB goes to the kernel
> and 2GB to userland, and as such that's the most you'd be able to
> allocate assuming nothing else was taking up the space.
Thank you, I thought I read somewhere that applications on Haiku could use a
total of 4GB address space on a machine with enough memory. From that I just
assumed (you know what that makes me :) that I could use more than 2GB on a
3GB machine.
If in the future I buy a 8GB machine will I still be limited to 2GB per app?
If not, do I have to look for anything special in choosing which machine to
buy? Intel vs AMD chipset? PAE? Etc. Can I assume the limit will become 4GB
per application on such a machine?
> Ingo Weinhold wrote:
> Assu
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