Re: [RFC] VM: I have a dream...

[Peter Chubb]

>>>>> "Jamie" == Jamie Lokier <jamie@xxxxxxxxxxxxx> writes:

Jamie> Chase Venters wrote:
>> Just as a curiosity... does anyone have any guesses as to the
>> runtime performance cost of hosting one or more swap files (which
>> thanks to on demand creation and growth are presumably built of
>> blocks scattered around the disk) versus having one or more simple
>> contiguous swap partitions?

>> I think it's probably a given that swap partitions are better; I'm
>> just curious how much better they might actually be.

Jamie> When programs must access files in addition to swapping, and
Jamie> that includes demand-paged executable files, swap files have
Jamie> the _potential_ to be faster because they provide opportunities
Jamie> to use the disk nearer the files which are being accessed.

If you can, put your swap on a different spindle...


Actually, the original poster's `dream' looked a lot like a
single-address-space operating system, such as Mungi (
http://www.cse.unsw.edu.au/~disy/Mungi/ )
-- 
Dr Peter Chubb  http://www.gelato.unsw.edu.au  peterc AT gelato.unsw.edu.au
http://www.ertos.nicta.com.au           ERTOS within National ICT Australia
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