Re: ancient OS history, ARM is sort of channeling the IBM 360

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Sujet : Re: ancient OS history, ARM is sort of channeling the IBM 360
De : lynn (at) *nospam* garlic.com (Lynn Wheeler)
Groupes : comp.arch
Date : 24. Jun 2024, 04:46:11
Autres entêtes
Organisation : Wheeler&Wheeler
Message-ID : <87le2vatq4.fsf@localhost>
References : 1 2 3 4 5
User-Agent : Gnus/5.13 (Gnus v5.13)

John Levine <johnl@taugh.com> writes:
Not really. VS1 was basically MFT running in a single virtual address
space. The early versions of VS2 were SVS, MVT running in a single
virtual address space, and then MVS, where each job got its own
address space. As Lynn has often explained, OS chewed up so much of
the address space that they needed MVS to make enough room for
programs to keep doing useful work.

... also SVS single 16mbyte virtual address space (sort of like running
MVT in CP67 16mbyte virtual machine) to "protect" regions from each
other still used the 360 4bit storage protection key ...  so caped at 15
concurrent regions ... but systems were getting faster, much faster than
disks were getting faster ... so needed increasing numbers of
concurrently executing regions ... so went to MVS ... gave each region
its own virtual address space (to keep them isolated/protected from each
other). But MVS was becoming increasingly bloated both in real storage
and amount it took in each region's virtual address space .... so needed
more than 16mbyte real storage as well as more than 16mbyte virtual
storage.

trivia: I was pontificating in the 70s about mismatch between increase
in system throughput (memory & CPU) and increase in disk throughput. In
early 80s wrote a tome that the relative system throughput of disk had
declined by an order of magnitude since 360 was announced in the 60s
(systems increase 40-50 times, disks increased 3-5 times). A disk
division executive took exception and assigned the division performance
group to refute my claims. After a couple of weeks, they basically came
back and said that I had slightly understated the problem.

They then respun the analysis for a (mainframe user group) SHARE
presentation for how to configure disks for increased system throughput
(16Aug1984, SHARE 63, B874).

more recently there have been some references that cache-miss, memory
access latency, when measured in count of processor cycles, is
compareable to 60s disk access latency, when measure in count of 60s
processor cycles (memory is new disk).

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

Date Sujet#  Auteur
20 Jun 24 * ARM is channeling the IBM 360102John Savard
20 Jun 24 +* Re: ARM is sort of channeling the IBM 36095John Levine
21 Jun 24 i`* Re: ARM is sort of channeling the IBM 36094Lynn Wheeler
24 Jun 24 i `* Re: ARM is sort of channeling the IBM 36093Lawrence D'Oliveiro
24 Jun 24 i  +* Re: ancient OS history, ARM is sort of channeling the IBM 36090John Levine
24 Jun 24 i  i+* Re: ancient OS history, ARM is sort of channeling the IBM 36087Lynn Wheeler
24 Jun 24 i  ii+* Re: ancient OS history, ARM is sort of channeling the IBM 36082Lawrence D'Oliveiro
25 Jun 24 i  iii`* Re: ancient OS history, ARM is sort of channeling the IBM 36081John Levine
25 Jun 24 i  iii +* Re: ancient OS history, ARM is sort of channeling the IBM 36073Lawrence D'Oliveiro
25 Jun 24 i  iii i`* Re: ancient OS history, ARM is sort of channeling the IBM 36072Stephen Fuld
25 Jun 24 i  iii i +* Re: ancient OS history, ARM is sort of channeling the IBM 36064Stephen Fuld
26 Jun 24 i  iii i i`* Re: ancient OS history, ARM is sort of channeling the IBM 36063Stephen Fuld
26 Jun 24 i  iii i i `* Re: ancient OS history, ARM is sort of channeling the IBM 36062Lawrence D'Oliveiro
26 Jun 24 i  iii i i  +* Re: ancient OS history, ARM is sort of channeling the IBM 36057John Levine
26 Jun 24 i  iii i i  i`* Re: ancient OS history, ARM is sort of channeling the IBM 36056Lawrence D'Oliveiro
27 Jun 24 i  iii i i  i `* Re: ancient OS history, ARM is sort of channeling the IBM 36055John Levine
27 Jun 24 i  iii i i  i  `* Re: ancient OS history, ARM is sort of channeling the IBM 36054MitchAlsup1
28 Jun 24 i  iii i i  i   `* Re: ancient OS history, ARM is sort of channeling the IBM 36053Lawrence D'Oliveiro
28 Jun 24 i  iii i i  i    +- Re: TSS I/O, ancient OS history1John Levine
28 Jun 24 i  iii i i  i    `* Re: ancient OS history, ARM is sort of channeling the IBM 36051MitchAlsup1
28 Jun 24 i  iii i i  i     `* Re: ancient OS history, ARM is sort of channeling the IBM 36050Lawrence D'Oliveiro
29 Jun 24 i  iii i i  i      `* Re: ancient OS history, ARM is sort of channeling the IBM 36049Stephen Fuld
29 Jun 24 i  iii i i  i       `* Re: ancient OS history, ARM is sort of channeling the IBM 36048John Levine
30 Jun 24 i  iii i i  i        +* Re: ancient OS history, ARM is sort of channeling the IBM 36032Lawrence D'Oliveiro
30 Jun 24 i  iii i i  i        i+- Re: ancient OS history, ARM is sort of channeling the IBM 3601MitchAlsup1
30 Jun 24 i  iii i i  i        i`* Re: ancient OS history, ARM is sort of channeling the IBM 36030Stephen Fuld
30 Jun 24 i  iii i i  i        i +* Re: ancient OS history, ARM is sort of channeling the IBM 36024Lawrence D'Oliveiro
30 Jun 24 i  iii i i  i        i i+* Re: ancient OS history, ARM is sort of channeling the IBM 36022Lynn Wheeler
30 Jun 24 i  iii i i  i        i ii`* Re: ancient OS history, ARM is sort of channeling the IBM 36021John Dallman
30 Jun 24 i  iii i i  i        i ii +* Re: ancient OS history, ARM is sort of channeling the IBM 36019Thomas Koenig
30 Jun 24 i  iii i i  i        i ii i+* Re: ancient OS history, ARM is sort of channeling the IBM 3608Michael S
30 Jun 24 i  iii i i  i        i ii ii+* Re: ancient OS history, ARM is sort of channeling the IBM 3606Thomas Koenig
30 Jun 24 i  iii i i  i        i ii iii+* Re: ancient OS history, ARM is sort of channeling the IBM 3604Stephen Fuld
30 Jun 24 i  iii i i  i        i ii iiii`* Re: base registers, ancient OS history, ARM is sort of channeling the IBM 3603John Levine
1 Jul 24 i  iii i i  i        i ii iiii `* Re: base registers, ancient OS history, ARM is sort of channeling the IBM 3602Lawrence D'Oliveiro
1 Jul 24 i  iii i i  i        i ii iiii  `- Re: base registers, ancient OS history, ARM is sort of channeling the IBM 3601John Levine
30 Jun 24 i  iii i i  i        i ii iii`- Re: ancient OS history, ARM is sort of channeling the IBM 3601MitchAlsup1
30 Jun 24 i  iii i i  i        i ii ii`- Re: ancient OS history, ARM is sort of channeling the IBM 3601MitchAlsup1
30 Jun 24 i  iii i i  i        i ii i`* Re: ancient OS history, ARM is sort of channeling the IBM 36010John Dallman
30 Jun 24 i  iii i i  i        i ii i +- Re: ancient OS history, ARM is sort of channeling the IBM 3601MitchAlsup1
30 Jun 24 i  iii i i  i        i ii i `* Re: ancient OS history, ARM is sort of channeling the IBM 3608Stephen Fuld
30 Jun 24 i  iii i i  i        i ii i  +- Re: small old machines, ancient OS history, ARM is sort of channeling the IBM 3601John Levine
30 Jun 24 i  iii i i  i        i ii i  +* Re: ancient OS history, ARM is sort of channeling the IBM 3604John Dallman
30 Jun 24 i  iii i i  i        i ii i  i+* Re: ancient OS history, ARM is sort of channeling the IBM 3602Stephen Fuld
30 Jun 24 i  iii i i  i        i ii i  ii`- Re: ancient OS history, ARM is sort of channeling the IBM 3601John Dallman
30 Jun 24 i  iii i i  i        i ii i  i`- Re: ancient OS history, ARM is sort of channeling the IBM 3601Lynn Wheeler
30 Jun 24 i  iii i i  i        i ii i  `* Re: ancient OS history, ARM is sort of channeling the IBM 3602MitchAlsup1
1 Jul 24 i  iii i i  i        i ii i   `- Re: ancient OS history, ARM is sort of channeling the IBM 3601moi
30 Jun 24 i  iii i i  i        i ii `- Re: ancient OS history, ARM is sort of channeling the IBM 3601Lynn Wheeler
30 Jun 24 i  iii i i  i        i i`- Re: ancient OS history, ARM is sort of channeling the IBM 3601Stephen Fuld
1 Jul 24 i  iii i i  i        i `* Re: ancient OS history, ARM is sort of channeling the IBM 3605Lawrence D'Oliveiro
2 Jul 24 i  iii i i  i        i  `* Re: ancient OS history, ARM is sort of channeling the IBM 3604John Levine
2 Jul 24 i  iii i i  i        i   `* Re: ancient OS history, ARM is sort of channeling the IBM 3603Lawrence D'Oliveiro
2 Jul 24 i  iii i i  i        i    `* Re: ancient OS history, ARM is sort of channeling the IBM 3602John Levine
2 Jul 24 i  iii i i  i        i     `- Re: ancient OS history, ARM is sort of channeling the IBM 3601Dan Cross
30 Jun 24 i  iii i i  i        `* Re: ancient OS history, ARM is sort of channeling the IBM 36015Anton Ertl
30 Jun 24 i  iii i i  i         `* Re: ancient OS history, ARM is sort of channeling the IBM 36014Anton Ertl
30 Jun 24 i  iii i i  i          `* Re: streams and file locks, ancient OS history, ARM is sort of channeling the IBM 36013John Levine
1 Jul 24 i  iii i i  i           +* Re: streams and file locks, ancient OS history, ARM is sort of channeling the IBM 36010MitchAlsup1
1 Jul 24 i  iii i i  i           i`* Re: streams and file locks, ancient OS history, ARM is sort of channeling9John Levine
1 Jul 24 i  iii i i  i           i `* Re: streams and file locks, ancient OS history, ARM is sort of channeling8MitchAlsup1
1 Jul 24 i  iii i i  i           i  `* Re: streams and file locks, ancient OS history, ARM is sort of channeling7John Levine
1 Jul 24 i  iii i i  i           i   +* Re: streams and file locks, ancient OS history, ARM is sort of channeling2Lawrence D'Oliveiro
1 Jul 24 i  iii i i  i           i   i`- Re: streams and file locks, ancient OS history, ARM is sort of channeling1John Levine
1 Jul 24 i  iii i i  i           i   `* Re: streams and file locks, ancient OS history, ARM is sort of channeling4Michael S
1 Jul 24 i  iii i i  i           i    `* Re: streams and file locks, ancient OS history, ARM is sort of channeling3MitchAlsup1
2 Jul 24 i  iii i i  i           i     +- Re: streams and file locks, ancient OS history, ARM is sort of channeling1Michael S
2 Jul 24 i  iii i i  i           i     `- Re: streams and file locks, ancient OS history, ARM is sort of channeling1Michael S
1 Jul 24 i  iii i i  i           `* Re: streams and file locks, ancient OS history, ARM is sort of channeling the IBM 3602Lawrence D'Oliveiro
1 Jul 24 i  iii i i  i            `- Re: streams and file locks, ancient OS history1John Levine
26 Jun 24 i  iii i i  `* Re: ancient OS history, ARM is sort of channeling the IBM 3604Stephen Fuld
26 Jun 24 i  iii i i   +* Re: ancient OS history, ARM is sort of channeling the IBM 3602John Levine
26 Jun 24 i  iii i i   i`- Re: ancient OS history, ARM is sort of channeling the IBM 3601Stephen Fuld
27 Jun 24 i  iii i i   `- Re: ancient OS history, ARM is sort of channeling the IBM 3601MitchAlsup1
26 Jun 24 i  iii i `* Re: ancient OS history, ARM is sort of channeling the IBM 3607John Levine
26 Jun 24 i  iii i  `* Re: ancient OS history, ARM is sort of channeling the IBM 3606John Levine
27 Jun 24 i  iii i   `* Re: ancient OS history, ARM is sort of channeling the IBM 3605Thomas Koenig
27 Jun 24 i  iii i    `* Re: ancient OS history, ARM is sort of channeling the IBM 3604John Levine
27 Jun 24 i  iii i     +- Re: ancient OS history, ARM is sort of channeling the IBM 3601Thomas Koenig
28 Jun 24 i  iii i     +- Re: ancient OS history, ARM is sort of channeling the IBM 3601Lawrence D'Oliveiro
28 Jun 24 i  iii i     `- Re: ancient OS history, ARM is sort of channeling the IBM 3601Lawrence D'Oliveiro
25 Jun 24 i  iii +* Re: ancient OS history, ARM is sort of channeling the IBM 3606Terje Mathisen
25 Jun 24 i  iii i+* Re: ancient OS history, ARM is sort of channeling the IBM 3602Lawrence D'Oliveiro
25 Jun 24 i  iii ii`- Re: ancient OS history, ARM is sort of channeling the IBM 3601Terje Mathisen
25 Jun 24 i  iii i`* Re: ancient OS history, ARM is sort of channeling the IBM 3603Michael S
26 Jun 24 i  iii i `* Re: ancient OS history, ARM is sort of channeling the IBM 3602Michael S
26 Jun 24 i  iii i  `- Re: ancient OS history, ARM is sort of channeling the IBM 3601Terje Mathisen
25 Jun 24 i  iii `- Re: ancient OS history, ARM is sort of channeling the IBM 3601Lynn Wheeler
24 Jun 24 i  ii`* Re: ancient OS history, ARM is sort of channeling the IBM 3604Terje Mathisen
24 Jun 24 i  ii +* Re: ancient OS history, ARM is sort of channeling the IBM 3602Lawrence D'Oliveiro
24 Jun 24 i  ii i`- Re: ancient OS history, ARM is sort of channeling the IBM 3601Stephen Fuld
24 Jun 24 i  ii `- Re: ancient OS history, ARM is sort of channeling the IBM 3601Thomas Koenig
24 Jun 24 i  i`* Re: ancient OS history, ARM is sort of channeling the IBM 3602Thomas Koenig
24 Jun 24 i  i `- Re: ancient OS history, ARM is sort of channeling the IBM 3601Lawrence D'Oliveiro
24 Jun 24 i  `* Re: ARM is sort of channeling the IBM 3602Stephen Fuld
24 Jun 24 i   `- Re: ARM is sort of channeling the IBM 3601Stephen Fuld
20 Jun 24 +* Re: ARM is channeling the IBM 3602moi
24 Jun 24 i`- Re: ARM is channeling the IBM 3601Lawrence D'Oliveiro
21 Jun 24 `* Re: ARM is channeling the IBM 3604MitchAlsup1
22 Jun 24  `* Re: ARM is channeling the IBM 3603John Dallman
22 Jun 24   +- Re: ARM is channeling the IBM 3601MitchAlsup1
22 Jun 24   `- Re: ARM is channeling the IBM 3601BGB

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