[Interest] memory fragmentation?
harri at mpaja.com
Wed Aug 22 09:53:48 CEST 2012
On 08/21/2012 01:27 AM, Alex Malyushytskyy wrote:
> For example one of our application on Windows ( this is the case when
> Windows is more flexible than Linux)
> - reserves the largest amount of continues memory we could afford
> for data (leaving enough for your widgets ) using VirtualAlloc with
> MEM_RESERVE flag,
> This insures that this address range will not be used when regular
> memory allocation occurs.
> - When data is loaded VirtualAlloc is called with MEM_COMMIT flag to
> allocate as much memory as needed.
> This approach works well since reservation takes no time, time
> consuming operation is (normally associated with memory allocations)
I wonder why you say Linux is less flexible? Couldn't you just write a
custom allocator directly using sbrk()?
Also, 32 bit linux process leaves more application space free, so you
can easily reach 2Gb process size, while I recall windows XP having
issues after 1.5Gb. It's been a while, so I might not recall all
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