Recent questions tagged multithreading

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multithreading - Threading in python doesn't happen parallel

I'm doing data scraping calls with an urllib2, yet they each take around 1 seconds to complete. I was trying ... least to around 30-45minutes. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Taking a semaphore must be atomic. Is Pintos's sema_down safe?

This piece of code comes from Pintos source: https://www.cs.usfca.edu/~benson/cs326/pintos/pintos/src/threads/ ... convinced why it is atomic. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Can a hyper-threaded processor core execute two threads at the exact same time?

I'm having a hard time understanding hyper-threading. If the logical core doesn't actually exist, what's the ... t wrap my head around this See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Is C# += thread safe?

Just ran into a program where += is used on a shared variable among threads, so is += thread ... performs addition and assignment atomically? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - How do I specify the equivalent of volatile in VB.net?

I'm attempting to write a lock-free version of a call queue I use for message passing. This is not for ... action() Loop End Sub End Class See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - How to parallelize file reading and writing

I have a program which reads data from 2 text files and then save the result to another file. Since there ... Single Hard Disk Thanks. -Dbger See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Can a multi-threaded program ever be deterministic?

Normally it is said that multi threaded programs are non-deterministic, meaning that if it crashes it will be ... able to reproduce a crash? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Java: thread-safe RandomAccessFile

After some serious googleing I found out that the RandomAccessFile-class is not thread-safe. Now I could use one ... possible at all? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - How to share single SQLite connection in multi-threaded Python application

I am trying to write a multi-threaded Python application in which a single SQlite connection is shared among threads. I ... i*100,)) t.start() See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Java, divide incoming work uniformly via hashing in multithreaded evnironments

I've implemented a java code to execute incoming tasks (as Runnable) with n Threads based on their hashCode module ... code can be found here. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Write end dead exception using PipedInputStream java

Write end dead exception occurs in the following situation: Two threads: A: PipedOutputStream put = new ... and solve it? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Threading in Gtk python

So I'm busy writing an application that needs to check for updates from a website after a certain amount ouf time, ... start when the UI is up. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - java daemon thread and non-daemon thread

I am doing java past exam paper, and I have encounter the following question that is confusing me. Which of the ... ,C is correct? Many thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - In WinForms, why can't you update UI controls from other threads?

I'm sure there is a good (or at least decent) reason for this. What is it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - How to stop a thread waiting in a blocking read operation in Java?

I have a thread that executes the following code: public void run() { try { int n = 0; byte[] buffer ... using Thread.interrupt appear to work. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Do mutexes guarantee ordering of acquisition?

A coworker had an issue recently that boiled down to what we believe was the following sequence of events in ... this aspect of mutexes before. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Can't create new threads in Python

import threading threads = [] for n in range(0, 60000): t = threading.Thread(target=function,args=(x, n)) ... doesn't seem to work properly. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Does multi-threading improve performance? How?

I hear everyone talking about how multi-threading can improve performance. I don't believe this, unless there is ... for dividing the work? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - How to stop all runnable thread in java executor class?

final ExecutorService executor = Executors.newFixedThreadPool(1); final Future<?> future = executor.submit(myRunnable); ... should I do it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Is there a good way to forcefully stop a Java thread?

I want to stop a Java thread immediately but when I try the thread always takes some time before stopping. ... Java thread to stop instantly? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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548 views

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multithreading - Stopping a specific java thread

I have a button "addCashier" which is creating a thread called "Cashier" now this thread is just simply ... sense. Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - how to override thread.start() method in java?

I need to implement thread.start() method in my java code. Please let me know through an example of overriding of ... ) method and how it works? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - How do I send data to a running python thread?

I have a class that is run in separate threads in my application. I can have multiple threads running at a ... -9 Received Print this again! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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561 views

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multithreading - JavaFX Update progressbar in tableview from Task

I know Task has a method updateProgress, I would need to bind progressbar to task, however I cannot do that, ... not update progress bar... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Status of mixing multiprocessing and threading in Python

What are best practices or work-arounds for using both multiprocessing and user threads in the same python application ... 2,3.3) application? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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633 views

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multithreading - Threading in python using queue

I wanted to use threading in python to download lot of webpages and went through the following code which uses queues ... (time.time() - start) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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616 views

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multithreading - Terminate a multi-thread python program

How to make a multi-thread python program response to Ctrl+C key event? Edit: The code is like this: import threading ... .py", line 22, in run See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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748 views

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multithreading - How to prove that HashMap in java is not thread-safe

I'm working on an application, that has uses a HashMap to share state. I need to prove via unit tests ... works well with concurrent requests? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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