22 Feb
2006
22 Feb
'06
7:12 a.m.
Brian Wheeler wrote:
paging is like swapping except using
smaller-than-segment chunks (i.e.
pages). In a paging system, each segment consists of a bunch of
fixed-size pages and each one of those pages can be put on disk (or
brought back) individually. When the OS tries to read from one of the
missing pages, an exception is raised and the memory is loaded from
disk.
It wouldn't be so bad if people didn't use them interchangeably, but
alas they do.
Also back then you used lots less memory for processes.
With a swap page size of 4K that could be your whole working memory
under basic or simple text editor.
Note the PDP-8 I think used a page size of 128 words for its swapping
functions.
Brian