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

Groups > comp.arch > #118593

Re: SIMD Considered Harmful

From MitchAlsup <user5857@newsgrouper.org.invalid>
Newsgroups comp.arch
Subject Re: SIMD Considered Harmful
References (10 earlier) <1790458267-5857@newsgrouper.org> <1199t54$vnj4$1@dont-email.me> <KJvuS.15$MN2.2@fx45.iad> <119eqc2$2p79r$1@dont-email.me> <LkDuS.3$awG5.0@fx16.iad>
Date 2026-10-13 21:40 +0000
Message-ID <1791927653-5857@newsgrouper.org> (permalink)

Show all headers | View raw

scott@slp53.sl.home (Scott Lurndal) posted:

> BGB <cr88192@gmail.com> writes:
> >On 9/28/2026 10:29 AM, Scott Lurndal wrote:
> >> BGB <cr88192@gmail.com> writes:
> >>> On 9/26/2026 4:31 PM, MitchAlsup wrote:
> 
> >
> >Either way, quite different from how HDDs were once done on x86:
> >   Wait for IRQ;
> >   Do a bunch of IN/OUT instructions to move the data via IO ports.
> 
> All the mainframes at that time had been using DMA for a couple
> of decades.

The youngest mainframe that did not have DMA was the CDC 7600--where
the peripheral processors performed this task {roughly a gaggle of
PDP-8s doing your I/O DMA}. Even here, the CPUs were not moving disk 
buffers to/from memory.

In the CDC 6600 era, the PPs performed the Operating System Duties,
In the CDC 7600 era, some of the OS functions were done in the CPU.

Back to comp.arch | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-24 00:00 +0000
  Re: SIMD Considered Harmful Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-24 02:05 +0000
    Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-24 17:09 +0000
      Re: SIMD Considered Harmful Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-25 00:08 +0000
        Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-25 00:41 +0000
          Re: SIMD Considered Harmful Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-25 22:13 +0000
            Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-26 00:29 +0000
              Re: SIMD Considered Harmful anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-09-26 06:41 +0000
                Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-26 18:23 +0000
                Re: SIMD Considered Harmful BGB <cr88192@gmail.com> - 2026-09-26 14:47 -0500
                Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-26 21:31 +0000
                Re: SIMD Considered Harmful BGB <cr88192@gmail.com> - 2026-09-26 20:56 -0500
                Re: SIMD Considered Harmful scott@slp53.sl.home (Scott Lurndal) - 2026-09-28 15:29 +0000
                Re: SIMD Considered Harmful BGB <cr88192@gmail.com> - 2026-09-28 17:39 -0500
                Re: SIMD Considered Harmful scott@slp53.sl.home (Scott Lurndal) - 2026-09-29 00:09 +0000
                Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-10-13 21:40 +0000
                Re: SIMD Considered Harmful Torbjorn Lindgren <tl@none.invalid> - 2026-09-29 17:01 +0000
                Re: SIMD Considered Harmful BGB <cr88192@gmail.com> - 2026-09-29 20:49 -0500
    Re: SIMD Considered Harmful BGB <cr88192@gmail.com> - 2026-09-24 15:04 -0500
  Re: SIMD Considered Harmful Stephen Fuld <sfuld@alumni.cmu.edu.invalid> - 2026-09-24 07:54 -0700
    Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-24 19:48 +0000
      Re: SIMD Considered Harmful Stephen Fuld <sfuld@alumni.cmu.edu.invalid> - 2026-09-24 13:58 -0700
        Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-24 22:24 +0000
          Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-25 00:27 +0000
          Re: SIMD Considered Harmful EricP <ThatWouldBeTelling@thevillage.com> - 2026-09-25 17:44 -0400
            Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-25 23:03 +0000
              Re: SIMD Considered Harmful EricP <ThatWouldBeTelling@thevillage.com> - 2026-09-27 11:33 -0400
                Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-28 00:04 +0000
                Re: SIMD Considered Harmful EricP <ThatWouldBeTelling@thevillage.com> - 2026-09-29 12:17 -0400
  Re: SIMD Considered Harmful Thomas Koenig <tkoenig@netcologne.de> - 2026-09-26 11:26 +0000
    Re: SIMD Considered Harmful Terje Mathisen <terje.mathisen@tmsw.no> - 2026-09-26 17:57 +0200
    Re: SIMD Considered Harmful BGB <cr88192@gmail.com> - 2026-09-26 13:52 -0500
      Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-26 21:24 +0000
    Re: SIMD Considered Harmful MitchAlsup <user5857@newsgrouper.org.invalid> - 2026-09-26 21:16 +0000
  Re: SIMD Considered Harmful aph@littlepinkcloud.invalid - 2026-09-28 09:53 +0000

csiph-web