🚀 go-pugleaf

  <4335ku$np8@orion.cybercom.net> <43bp68$on2@unidhp.uni-c.dk> <DEzrLq.1D2@wombat.hanse.de>
NNTP-Posting-Host: tycho.gbar.dtu.dk
X-Newsreader: TIN [version 1.2 PL1]
Xref: xlink.net comp.sys.powerpc:65662 comp.os.linux.advocacy:30736 comp.sys.mac.advocacy:80381 comp.os.os2.advocacy:162984 comp.sys.amiga.advocacy:141998 comp.sys.intel:61557

On Sat, 16 Sep 1995 09:27:26 GMT Bernd "Bernie" Meyer (root@wombat.hanse.de) wrote:
> gc948374@tycho.gbar.dtu.dk (Rask Lambertsen) writes:
> >On 12 Sep 1995 05:25:50 GMT Jerry Shekhel (jerry@cybercom.net) wrote:

> >> It would be, if your numbers were accurate.  They aren't.

> >True. Amiga OS runs smoothly in as little as 2 MB. The HP Unix workstations
> >we have at DTU have 128 MB of physical RAM and still keep swapping all the
> >time.

> And I bet they are doing the same thing, too. NOT!

> >> When I run out of physical RAM, I'd much rather have my OS swap than stop.

> >The Amiga OS doesn't stop if it runs out of RAM (it doesn't run out of RAM
> >often anyway, but that is not the point). 

> Then what does it do? If there is only 3 megs free, and my process wants to 
> allocate 4 megs, what happens? 

Then the process it told that the allocation failed. What happens then it up
to the process.

> >And if you want to use virtual
> >memory with Amiga OS, then you can do so if your Amiga has a MMU.

> And your programs are all well-behaved and used the proper memory classes in 
> allocation requests. Now quite a few don't, so you have to disable Gigamem

and if there are no hardware faults and if the power is on and if there is
not an earthquake and if ....

For me, this would not be much of a problem: I'd simply not use those
programs, just as I don't use any other badly behaved programs.
The philosofy is simple: If a programme breaks because I upgrade or expand
in any way, I won't let that programme take up space on my hard disk.

> for them (GM comes with a list of such programs). What happens when VM kicked
> in, you still have 20M swap space free, but all your physical memory has been
> comitted already, and now one of these non-VM aware programs requests 20k?
                                         ^^^^^^^^^^^^
There is no such thing as an VM aware or non-VM aware programme on the Amiga.
There are non-broken programmes and broken programmes. There are no special
ways to support VM. To answer your question: Some of the physical memory
would be swapped with some of the virtual memory, in this case at least
20 kB.

--
Regards,
 _________________________________________________________________________
/                                                                         \
| Rask Ingemann Lambertsen <gc948374@gbar.dtu.dk>, <e9864029@ebar.dtu.dk> |
|            WWW homepage: http://srv2.gbar.dtu.dk:8001/Rask/             |
|  Keyboard error: <Ctrl> and <Alt> are stuck - press <Del> to continue   |
\_________________________________________________________________________/