From: Paul Winalski <paul.winalski@gmail.com>
To: "Theodore Y. Ts'o" <tytso@mit.edu>
Cc: tuhs@minnie.tuhs.org
Subject: Re: [TUHS] PDP-11 legacy, C, and modern architectures
Date: Thu, 28 Jun 2018 12:45:39 -0400 [thread overview]
Message-ID: <CABH=_VQyoKgCcfRGJgpac5freEGBAeGetr9v9L8bTh0Oe6PYzA@mail.gmail.com> (raw)
In-Reply-To: <20180628141538.GB663@thunk.org>
On 6/28/18, Theodore Y. Ts'o <tytso@mit.edu> wrote:
>
> It's the same mistake
> Chisnall made when he assrted the parallel programming a myth that
> humans writing parallel programs was "hard", and "all you needed" was
> the right language.
I''ve heard the "all you need is the right language" solution to the
parallel processing development problem since I joined DEC in 1980.
Here we are in 2018 and nobody's found that "right language" yet.
Parallel programming *is* hard for humans. Very few people can cope
with it, or with the nasty bugs that crop up when you get it wrong.
> The problem is that not all people are interested in solving problems
> which are amenable to embarassingly parallel algorithms.
Most interesting problems in fact are not embarrassingly parallel.
They tend to have data interdependencies.
There have been some advancements in software development tools to
make parallel programming easier. Modern compilers are getting pretty
good at loop analysis to discover opportunities for parallel execution
and vectorization in sequentially-written code.
-Paul W.
next prev parent reply other threads:[~2018-06-28 16:45 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-26 17:54 Nelson H. F. Beebe
2018-06-26 18:03 ` Cornelius Keck
2018-06-26 21:21 ` Nelson H. F. Beebe
2018-06-26 21:56 ` Kurt H Maier
2018-06-26 18:52 ` Ronald Natalie
2018-06-26 19:01 ` Ronald Natalie
2018-06-26 21:16 ` Arthur Krewat
2018-06-26 21:50 ` Larry McVoy
2018-06-26 21:54 ` Ronald Natalie
2018-06-26 21:59 ` Larry McVoy
2018-06-26 22:20 ` Bakul Shah
2018-06-26 22:33 ` Arthur Krewat
2018-06-26 23:53 ` Bakul Shah
2018-06-27 8:30 ` Tim Bradshaw
2018-06-26 22:33 ` Andy Kosela
2018-06-27 0:11 ` Bakul Shah
2018-06-27 6:10 ` arnold
2018-06-27 2:18 ` [TUHS] PDP-11 legacy, C, and modern architectTures Theodore Y. Ts'o
2018-06-27 2:22 ` Theodore Y. Ts'o
2018-06-28 14:36 ` Steffen Nurpmeso
2018-06-27 11:26 ` [TUHS] PDP-11 legacy, C, and modern architectures Tony Finch
2018-06-27 14:33 ` Clem Cole
2018-06-27 14:38 ` Clem Cole
2018-06-27 15:30 ` Paul Winalski
2018-06-27 16:55 ` Tim Bradshaw
2018-06-27 6:27 ` arnold
2018-06-27 16:00 ` Steve Johnson
2018-06-28 4:12 ` Bakul Shah
2018-06-28 14:15 ` Theodore Y. Ts'o
2018-06-28 14:40 ` Larry McVoy
2018-06-28 14:55 ` Perry E. Metzger
2018-06-28 14:58 ` Larry McVoy
2018-06-28 15:39 ` Tim Bradshaw
2018-06-28 16:02 ` Larry McVoy
2018-06-28 16:41 ` Tim Bradshaw
2018-06-28 16:59 ` Paul Winalski
2018-06-28 17:09 ` Larry McVoy
2018-06-29 15:32 ` tfb
2018-06-29 16:09 ` Perry E. Metzger
2018-06-29 17:51 ` Larry McVoy
2018-06-29 18:27 ` Tim Bradshaw
2018-06-29 19:02 ` Perry E. Metzger
2018-06-28 20:37 ` Perry E. Metzger
2018-06-28 15:37 ` Clem Cole
2018-06-28 20:37 ` Lawrence Stewart
2018-06-28 14:43 ` Perry E. Metzger
2018-06-28 14:56 ` Larry McVoy
2018-06-28 15:07 ` Warner Losh
2018-06-28 19:42 ` Perry E. Metzger
2018-06-28 19:55 ` Paul Winalski
2018-06-28 20:42 ` Warner Losh
2018-06-28 21:03 ` Perry E. Metzger
2018-06-28 22:29 ` Theodore Y. Ts'o
2018-06-29 0:18 ` Larry McVoy
2018-06-29 15:41 ` Perry E. Metzger
2018-06-29 18:01 ` Larry McVoy
2018-06-29 19:07 ` Perry E. Metzger
2018-06-29 5:58 ` Michael Kjörling
2018-06-28 20:52 ` Lawrence Stewart
2018-06-28 21:07 ` Perry E. Metzger
2018-06-28 16:45 ` Paul Winalski [this message]
2018-06-28 20:47 ` Perry E. Metzger
2018-06-29 15:43 ` emanuel stiebler
2018-06-29 2:02 ` Bakul Shah
2018-06-29 12:58 ` Theodore Y. Ts'o
2018-06-29 18:41 ` Perry E. Metzger
2018-06-29 1:02 Noel Chiappa
2018-06-29 1:06 Noel Chiappa
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