23 Dec
2021
23 Dec
'21
8:19 p.m.
On Thu, Dec 23, 2021 at 01:05:55PM +0000, Michael Kj??rling wrote:
On 22 Dec 2021 18:18 -0800, from lm(a)mcvoy.com (Larry
McVoy):
Probably boomer doing math wrong. You are right, I'm wrong. Though I
will say that 100K/student was _painful_. Not enough to run make/cc in
any reasonable time. About the only thing that worked was ^t (I think
that was it) that showed you some basic info about performance.
The CP/M machines bring back different memories,
using that and BDS
C because an 11/780 with 4MB of ram and 40 users meant each user was
getting 1KB so it swapped and swapped and swapped.
4 MB RAM and 40 users works out to 100 KB of RAM per user for me. Even
accounting for a large at the time OS it should be several tens of
kilobytes per user on average for actual useful data. So, because
there's probably some detail here that means you're right and I'm
wrong, how do you arrive at the figure 1 KB of RAM per user in that
scenario?