Thanks much for your time. Your code is simple & works fine - I guess because it is simple 2 level deep & the subroutine is not increasing the depth while working.

The data structure - I am handling with, will increase the structure depth. Basically branch-out, like a growing tree, every thread working on a unique branch is OK.

As other suggestions came like - Storing output in a new structure - and finally merging it - is fine - how to return different sized depth of every branch structure varying between 9 to 14, number of branches would few tens of thousands - and join them to form the final tree.

The starting structure that I need to share across threads - will be having depths like 4-6 level, when threads finished working every branch will have 9-14 levels.

BTW, in my experience, the %hash kind of usage are not very convenient, rather - I prefer reference of hash-ref-of-hash-ref - right from the root. I used to like..

$root->{$branch1}->{$branch2}..

[download]

Overall - so far in my understanding - perl threads is not cool, no matter what - It really cannot do big job with complex data structure in shared way - absolutely no references shared between threads. Internally every thread is creating another copy, so with GBs of data-structure I cannot really launch many threads.

My single-thread serialized code is working great though - it can do serious work on massive data-structures. It lacks true parallelism..

Perl Threads implementation so far, seems very inadequate - it is good for primary school student exhibiting how parallel programming works.

I wish next gen threads will be able to do what I am asking - seamless work on the shared structure over GPUs too [why not - being Interpreted, won't stop it running in GPU I guess. :) - anyway Thanks a lot again!!

In reply to Re^2: Is it possible to create a single Hash-of-Hash.. with multiple threads.. by gsat
in thread Is it possible to create a single Hash-of-Hash.. with multiple threads.. by gsat

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