Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > alt.folklore.computers > #164898

Re: Raspberry Pi 3?

Show all headers | View raw

Charlie Gibbs <cgibbs@kltpzyxm.invalid> writes:
> From time to time I glance at a 16GB SD card and reflect that it holds
> a thousand times the theoretical memory limit for large IBM 360 machines
> (theoretical because not even the largest installations could affort it).
> Or that the price of disk storage has fallen by seven orders of magnitude
> in that time - and that the above SD card holds more than all the disks
> in a large installation of the time.

I just got a 200GB mini-SD card for cellphone. In the past I've had
opportunity to comment that memory access latency measured in terms of
count of processor cycles is compareable to 60s disk access latency
(measured in terms of 60s processor cycles) ... which has given
rise to designs that decompose instructions into risc micro-ops
and out-of-order and speculative execution ... all trying to help
compensate for the (relatively) enormous memory latency.

In the 70s, I had started commenting that disk relative system
throughput was decreasing ... early 80s, I observed that disk relative
system throughput had decreased by an order of magnitude over a period
of 15 years (processor got 40-50 times faster, disks got 3-5 times
faster). part of early 80s comparison chart ... in this old post
http://manana.garlic.com/~lynn/93.html#31

disk division executive took exception and assigned the division
performance group to refute the claims. After a couple weeks they came
back and effectively said that I had slightly understated the
problem. They then respun the analysis (disks increasingly becoming
major throughput bottleneck) for SHARE presentation about how to
configure to improve system throughput ... SHARE 63, Presentaton B874,
some past posts mentioning B874
http://manana.garlic.com/~lynn/2002i.html#18 AS/400 and MVS - clarification please
http://manana.garlic.com/~lynn/2002i.html#46 AS/400 and MVS - clarification please
http://manana.garlic.com/~lynn/2006f.html#3 using 3390 mod-9s
http://manana.garlic.com/~lynn/2006o.html#68 DASD Response Time (on antique 3390?)
http://manana.garlic.com/~lynn/2007s.html#5 Poster of computer hardware events?
http://manana.garlic.com/~lynn/2009g.html#71 308x Processors - was "Mainframe articles"
http://manana.garlic.com/~lynn/2009i.html#7 My Vintage Dream PC
http://manana.garlic.com/~lynn/2009k.html#34 A Complete History Of Mainframe Computing
http://manana.garlic.com/~lynn/2009k.html#52 Hercules; more information requested
http://manana.garlic.com/~lynn/2009l.html#67 ACP, One of the Oldest Open Source Apps
http://manana.garlic.com/~lynn/2010c.html#1 "The Naked Mainframe" (Forbes Security Article)
http://manana.garlic.com/~lynn/2010h.html#70 25 reasons why hardware is still hot at IBM
http://manana.garlic.com/~lynn/2010l.html#31 Wax ON Wax OFF -- Tuning VSAM considerations
http://manana.garlic.com/~lynn/2010l.html#32 OS idling
http://manana.garlic.com/~lynn/2010l.html#33 History of Hard-coded Offsets
http://manana.garlic.com/~lynn/2010n.html#18 Mainframe Slang terms
http://manana.garlic.com/~lynn/2011.html#35 CKD DASD
http://manana.garlic.com/~lynn/2011.html#61 Speed of Old Hard Disks
http://manana.garlic.com/~lynn/2011e.html#1 Multiple Virtual Memory
http://manana.garlic.com/~lynn/2011p.html#5 Why are organizations sticking with mainframes?
http://manana.garlic.com/~lynn/2011p.html#32 Has anyone successfully migrated off mainframes?
http://manana.garlic.com/~lynn/2012b.html#73 Tape vs DASD - Speed/time/CPU utilization
http://manana.garlic.com/~lynn/2012e.html#39 A bit of IBM System 360 nostalgia
http://manana.garlic.com/~lynn/2012o.html#62 ISO documentation of IBM 3375, 3380 and 3390 track format
http://manana.garlic.com/~lynn/2013m.html#72 'Free Unix!': The world-changing proclamation made 30 years agotoday
http://manana.garlic.com/~lynn/2014l.html#90 What's the difference between doing performance in a mainframe environment versus doing in others
http://manana.garlic.com/~lynn/2014m.html#87 Death of spinning disk?
http://manana.garlic.com/~lynn/2015g.html#0 Miniskirts and mainframes
http://manana.garlic.com/~lynn/2015h.html#110 Is there a source for detailed, instruction-level performance info?
http://manana.garlic.com/~lynn/2016c.html#12 You count as an old-timer if (was Re: Origin of the phrase "XYZZY")
http://manana.garlic.com/~lynn/2016d.html#21 What was a 3314?


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

Back to alt.folklore.computers | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Raspberry Pi 3? "gareth G4SDW GQRP #3339" <no.spam@thank.you.invalid> - 2016-06-10 16:30 +0100
  Re: Raspberry Pi 3? "Osmium" <r124c4u102@comcast.net> - 2016-06-10 11:23 -0500
  Re: Raspberry Pi 3? Michael Black <et472@ncf.ca> - 2016-06-10 12:36 -0400
  Re: Raspberry Pi 3? artie <artie.m@gNOSPAMmail.com> - 2016-06-10 09:41 -0700
    Re: Raspberry Pi 3? "gareth G4SDW GQRP #3339" <no.spam@thank.you.invalid> - 2016-06-10 18:00 +0100
    Re: Raspberry Pi 3? Ahem A Rivet's Shot <steveo@eircom.net> - 2016-06-10 18:31 +0100
    Re: Raspberry Pi 3? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2016-06-10 18:03 +0000
      Re: Raspberry Pi 3? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-06-10 11:28 -0700
      Re: Raspberry Pi 3? "Charles Richmond" <numerist@aquaporin4.com> - 2016-06-11 10:33 -0500
        Re: Raspberry Pi 3? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-06-11 14:04 -0400
          Re: Raspberry Pi 3? "Charles Richmond" <numerist@aquaporin4.com> - 2016-06-12 09:39 -0500
    Re: Raspberry Pi 3? Bob Martin <bob.martin@excite.com> - 2016-06-11 08:01 +0100
  Re: Raspberry Pi 3? Ahem A Rivet's Shot <steveo@eircom.net> - 2016-06-10 17:52 +0100
    Re: Raspberry Pi 3? "gareth G4SDW GQRP #3339" <no.spam@thank.you.invalid> - 2016-06-10 18:03 +0100
      Re: Raspberry Pi 3? Ahem A Rivet's Shot <steveo@eircom.net> - 2016-06-10 19:04 +0100
  Re: Raspberry Pi 3? Bob Eager <news0006@eager.cx> - 2016-06-10 19:18 +0000
    Re: Raspberry Pi 3? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-06-10 20:56 -0400
      Re: Raspberry Pi 3? Morten Reistad <first@last.name.invalid> - 2016-06-11 11:04 +0200
        Re: Raspberry Pi 3? Bob Eager <news0006@eager.cx> - 2016-06-11 10:47 +0000
        Re: Raspberry Pi 3? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-06-11 07:51 -0400
      Re: Raspberry Pi 3? Bob Eager <news0006@eager.cx> - 2016-06-11 10:44 +0000
    Re: Raspberry Pi 3? mausg@mail.com - 2016-06-11 10:06 +0000
      Re: Raspberry Pi 3? Morten Reistad <first@last.name.invalid> - 2016-06-11 12:50 +0200
        Re: Raspberry Pi 3? mausg@mail.com - 2016-06-12 08:48 +0000
          Re: Raspberry Pi 3? "Charles Richmond" <numerist@aquaporin4.com> - 2016-06-12 09:37 -0500
            Re: Raspberry Pi 3? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-06-12 09:46 -0700
              Re: Raspberry Pi 3? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-06-12 09:51 -0700
              Re: Raspberry Pi 3? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-06-14 13:07 -0700
            Re: Raspberry Pi 3? Morten Reistad <first@last.name.invalid> - 2016-06-12 18:51 +0200
              Re: Raspberry Pi 3? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-06-12 17:04 -0400
            Re: Raspberry Pi 3? mausg@mail.com - 2016-06-13 08:04 +0000
              Re: Raspberry Pi 3? Ahem A Rivet's Shot <steveo@eircom.net> - 2016-06-13 10:00 +0100
      Re: Raspberry Pi 3? JimP <solosam90@gmail.com> - 2016-06-11 12:32 -0500

csiph-web