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Re: Windows 11 is now available [message #411786 is a reply to message #411780] Fri, 08 October 2021 17:57 Go to previous messageGo to previous message
Anne & Lynn Wheel is currently offline  Anne & Lynn Wheel
Messages: 3156
Registered: January 2012
Karma:
Senior Member
Anne & Lynn Wheeler <lynn@garlic.com> writes:
> This was important because the Grenoble Science Center had modified CP67
> to have a "working set dispatcher" ("local LRU" page replacement, from
> 1968 academic papers) running on 1mbyte (256 4k pages) with 35 (real)
> users had worse response and lower CPU useage (aka "global LRU" page
> replacement easily beat "local LRU" page replacement).

aka the 768kbyte IBM cambridge science center CP/67 360/67 with 104
pageable pages (after fixed memory requirements) had better response and
aggregate throughput with 85 users (and "global LRU") than the 1mbyte
IBM grenoble science center CP/67 360/67 with 156 pageable pages (after
fixed memory requirements, i.e. 50% more pageable pages for users than
cambridge machine) with 35 users and "local LRU" page replacement and
"working set dispatcher" ... as described in academic literature.

so it was effectively same hardware and nearly same system ... except
for the "global LRU" page replacement vis-a-vis "local LRU" page
replacement ... which supported the work done for Stanford Phd work more
than decade later on "global LRU'.

--
virtualization experience starting Jan1968, online at home since Mar1970
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