In Linux, when memory is requested (using calloc / malloc), if a contiguous block of the requested size is not available does the kernel map multiple separate pieces of memory into one single virtual block and hand it over to the application or is it allocated on disk? If it is allocated on disk, when a large…
Tag: heap-memory
How is RAM and Heap Space allocated for a linux/unix command?
So when I execute a linux command, say a cat command for this example, on a server with 128 GB of RAM, assuming none of this RAM is currently in use, all is free. (I realize this will never happen, but that’s why it’s an example) 1) Would this command then be executed with a heap space of all 128
debugging c using heap memory [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. This question does not appear to be about programming within the scope defined in the help center. Closed 9 years ago. Improve this question I am working with heap memory and I wrote an example below: I execu…
Allocate more than 2GB on the heap using c++ on a 32bit linux kernel
This seems to be a very common problem, but still I haven’t found a definite answer. I have access to a server which runs linux, has 16 GB of RAM and a 16-core (64bit) CPU (/proc/cpuinfo gives “Intel(R) Xeon(R) CPU E5520 @ 2.27GHz”). However, the kernel is 32bit (uname -m gives i686). Of cou…