if not I will have to redesign my system to use 'subprocess'
Expanding on this, for students on the list... Having many worker host
processes is not necessarily a bad thing. It can be more programmer
work, but it simplifies the parallelism in a way (e.g., "let the Linux
kernel worry
At Fri, 5 Oct 2018 17:55:47 +0200, Paulo Matos wrote:
> Matthew, Sam, do you understand why this is happening?
I still think it's probably allocation, and probably specifically
content on the process's page table. Do you see different behavior with
a non-allocating variant (via `--no-alloc`
Yes, @index
I learned about it to put "powerset" to the docs, and always go back
to that example when something like this comes up:
https://github.com/racket/racket/blob/master/pkgs/racket-doc/scribblings/reference/pairs.scrbl#L1333
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I was trying to create a much more elaborate example when Matthew sent
his tiny one which is enough to show the problem.
I started a 64core machine on aws to show the issue.
I see a massive degradation as the number of places increases.
I use this slightly modified code:
#lang racket
(define
Do we have an existing doc redirect mechanism? I’ve just spent five minutes
looking at docs for defproc and the “Indexing” section, and didn’t find
anything. Doesn’t mean it’s not there, but I did have a look. Then again, this
thread is a living testament to my inability to find things in
I tried this same program on my desktop, which also has 4 (i7-4770)
cores with hyperthreading. Here's what I see:
[samth@huor:~/work/grant_parallel_compilers/nsf_submissions (master)
plt] time r ~/Downloads/p.rkt 1
N: 1, cpu: 5808/5808.0, real: 5804
At Fri, 5 Oct 2018 15:36:04 +0200, Paulo Matos wrote:
> Again, I am really surprised that you mention that places are not
> separate processes. Documentation does say they are separate racket
> virtual machines, how is this accomplished if not by using separate
> processes?
Each place is an OS
Could we add a macro to allow defining alias names? Could call it
`set!-set-subset?`.
And probably want a way to see all such aliases:
`get-set!-set-subset?-set-subs`.
p.s. In all seriousness, the doc redirect is a great idea.
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On 05/10/2018 14:15, Matthew Flatt wrote:
> It's difficult to be sure from your description, but it sounds like the
> problem may just be the usual one of scaling parallelism when
> communication is involved.
>
Matthew, thanks for the reply.
The interesting thing here is that there is no
It's difficult to be sure from your description, but it sounds like the
problem may just be the usual one of scaling parallelism when
communication is involved.
Red is probably synchronization. It might be synchronization due to the
communication you have between places, it might be
All,
A quick update on this problem which is in my critical path.
I just noticed, in an attempt to reproduce it, that during the package
setup part of the racket compilation procedure the same happens.
I am running `make CPUS=24 in-place`on a 36 cpu machine and I see that
not only sometimes the
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