Is swap really needed when RAM's aplenty
jb.1234abcd at gmail.com
Fri Aug 20 20:05:38 UTC 2010
Michael Hennebry <hennebry <at> web.cs.ndsu.nodak.edu> writes:
> > If I remember my Kerningham-Ritchie correctly, the answer is yes, since
> > C relies on pointer arithmetic to refer to the elements of the array.
> > The "fred" and "greg" variables are pointers to the beginning of the
> > corresponding memory area, and referring fred[i] goes to the start of
> > the array at fred, and then goes i elements forward to end up with the
> > wanted element.
> That is contiguous in terms of virtual memory.
> Adjacent virtual addresses do not have to have adjacent physical addresses.
For application (that is, user-mode) programming, standard APIs provided for
memory allocation are malloc ( ) and realloc ( ). In both cases, the contiguity
of the underlying physical memory is not guaranteed. Consequently, these calls
are not suitable for use in cases in which contiguous physical memory is
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