Isolate is like a thread in Java, but the memory is not shared, also like a Linux process, but the function is more like Thread,how to understand it ?
Isolate is Isolate like you are you
but it's explain
independent workers that are similar to threads
You perhaps saw this doc
https://api.dart.dev/stable/2.8.4/dart-isolate/dart-isolate-library.html
Related
Would anyone know a way of explaining or could you direct me to some material regarding single Thread and multiple thread? I don't understand them at all. Every explanation I read is in very complicated English.
I want to understand them completely. Either a really good article / book / website etc where this is explained well would be well appreciated.
Threads are the smallest sequences of programmed instructions that
can be managed independently.
Multithreading uses multiple threads of the same process to reduce algorithm runtime. Threads of the same process run in the same memory space.
I am writing a PERL script involving multithreading. It has a GUI and the number of threads to be used will be taken as user input. Depending on this number, the script should generate threads which all access the same sub. I want the n threads to work in parallel. But when I create a loop, the parallel processing is lost. Any idea as to how to overcome this issue?
I believe that the simplest way to answer would be to recommend you to look at something like POE. The framework cookbook webpage provides many examples that surely will be a good starting point for your original issue.
Depending on your GUI platform, you may also want to spend time on event loops provided by the framework itself.
You probably need to call threads->yield() function occasionally in the processing loops. The yield() function gives a "hint" to give up the CPU for a thread.
Can someone please tell me interview type questions related to multithreading and GDB.
I already know Deadlock, race condition, synchronization and basics of threads.
Thanks in advance
Some sample questions:
How do you list out all the threads?
How do you set breakpoints in individual threads?
How do you see stacktrace of a particular thread?
Your program is in a deadlock; How do you find the root cause using gdb?
There is no end to questions. I would suggest that the best way to learn is to get knees deep in the dirt and play for yourself:
Make a sample multi-threaded program, debug it and try to find all possible info about all the threads.
Put some deadlock situation, and then debug it.
When did the concept of multi-threading come into the picture (as in time frame)? The basis of any multi threading app for performance improvement is the number of cores/processors and the idea of having multiple cores/processors is relatively new thanks to intel/amd, so how was multi-threading implemented in ancient times?
Take a look at the wikipedia's article on Concurrent Programming, especially the parts dedicated to single processor machines.
A quick search found this History of Multithreading: http://www.cs.clemson.edu/~mark/multithreading.html
It seems it is not a new idea by any means, going as far back as the 1950s
Multithreading is not just about using more cores to get more work done.
You might use multiple threads in a GUI program, where you need to stay responsive to the user, but you want to get other, background, work done.
You might find that your program waits for disk or network I/O. In this case, the CPU is idle, so you might as well use another thread to do some other work while you're waiting.
i am trying to do an application,like if there are 10 separate tasks and 4 threads are running.My application has to maintain two queue one for tasks and another for threads.If any task needs to execute it should find which thread is free and assign the task to that thread.i dont know how to produce this.Anyone knows what are the concepts i have to look,please help me.
It sounds like you just need a thread pool of the kind returned by Executors.newFixedThreadPool. Just submit the tasks to the thread pool when you need to, and it will be executed accordingly.
The ThreadPoolExecutor does pretty well exactly that for you.
I suppose you could make your tasks Runnable and use a ThreadPoolExecutor to run them.
Yes Executor would be best approach for this problem. BUt u need to keep various things in mind while using the executor and also INs and OUTs of executor as Executor is a service which if used properly can be a blessing and if not it can be a big mistake.