Re: Thoughts about streaming from disk and VM
Re: Thoughts about streaming from disk and VM
- Subject: Re: Thoughts about streaming from disk and VM
- From: Steven Spencer <email@hidden>
- Date: Fri, 14 Mar 2003 21:49:40 +0000
I have used valloc, but have read that it is obsolete -
see
http://www.osxfaq.com/man/3/valloc.ws
The following source mentions malloc calling vm_allocate to page align large blocks of memory
http://developer.apple.com/techpubs/macosx/Essentials/Performance/VirtualMemory/Allocating__eing_Memory.html
Since valloc calls malloc, it seems that calling malloc with a request
for memory larger than the size of one page causes the block to be
allocated on a page boundary.
- Steve Spencer
On Friday, March 14, 2003, at 06:08PM, Jeremy Sagan <email@hidden> wrote:
>
On Thursday, March 13, 2003, at 03:32 PM, Bill Stewart wrote:
>
>
> Yes INDEED - you will get much better disk performance if the
>
> following are page aligned:
>
> (1) The start address of your buffer
>
>
Is there a recommended way to get memory aligned to a page?
>
>
Jeremy
>
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