Re:Python Threading Beginners Tutorial [video]
by vitus on Thursday August 17, 2017 @08:03AM
(#15035908)
> threading is shared memory and multiprocessing is message passing
In most cases, yes. You can use shared memory buffers for IPC, though, although it typically requires more effort.
Re:Python Threading Beginners Tutorial [video]
by pvg on Thursday August 17, 2017 @07:46AM
(#15035823)
It's an implementation difference with big practical implications. 'Fundamental divide at the root of all concurrency' seems more than a little overstated.
Re:Python Threading Beginners Tutorial [video]
by chrisseaton on Thursday August 17, 2017 @08:02AM
(#15035902)
Almost every approach to concurrency fits into either shared memory or message passing.
Those that cross between the two are usually notable for doing that and describe themselves as a hybrid approach.
I think it divides the literature pretty cleanly in two.
But if you meant semantically equivalent, no they aren't - threading is shared memory and multiprocessing is message passing. If you were to draw a tree of approaches to concurrency and parallelism, you would probably make this division the root node bisecting the domain into two - it's the two fundamental approaches to doing concurrency.