Recent questions tagged concurrency

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concurrency - Java socket swingWorker running but no message received or transmitted

A few days ago i tried to create a server - client or client Server as an experiment to learn about socket ... ; } runningServer.execute(); } See Question&Answers more detail:os...

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

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547 views

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concurrency - MySQL INSERT IF (custom if statements)

First, here's the concise summary of the question: Is it possible to run an INSERT statement conditionally? ... obviously does not apply 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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675 views

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concurrency - To what level does MongoDB lock on writes? (or: what does it mean by "per connection"

In the mongodb documentation, it says: Beginning with version 2.2, MongoDB implements locks on a per-database ... locked while it writes? See Question&Answers more detail:os...

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

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concurrency - What is the Swift equivalent to Objective-C's "@synchronized"?

I've searched the Swift book, but can't find the Swift version of @synchronized. How do I do mutual exclusion in Swift? See Question&Answers more detail:os...

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

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699 views

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concurrency - Would you explain lock ordering?

I learned that I should unlock reverse order to lock order. For example. A.lock(); B.lock(); B.unlock(); ... know how deadlock would happen. Would you help me? Question&Answers:os...

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

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754 views

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concurrency - Scala Futures - built in timeout?

there is an aspect of futures that I do not exactly understand from the official tutorial ref. http://docs.scala-lang ... not process file: " + t.getMessage) } Question&Answers:os...

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

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667 views

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concurrency - .NET - Dictionary locking vs. ConcurrentDictionary

I couldn't find enough information on ConcurrentDictionary types, so I thought I'd ask about it here. ... Reference to .NET 4.0's ConcurrentDictionary Question&Answers:os...

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

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608 views

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concurrency - What is a database transaction?

Can someone provide a straightforward (but not simpler than possible) explanation of a transaction as applied to computing (even if copied from Wikipedia)? Question&Answers:os...

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

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672 views

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concurrency - How do I call some blocking method with a timeout in Java?

Is there a standard nice way to call a blocking method with a timeout in Java? I want to be able to do: / ... 2 seconds, forget it if that makes sense. Thanks. Question&Answers:os...

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

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553 views

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concurrency - Solving embarassingly parallel problems using Python multiprocessing

How does one use multiprocessing to tackle embarrassingly parallel problems? Embarassingly parallel problems typically ... processes concurrently with I/O)? Question&Answers:os...

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

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613 views

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concurrency - Different types of thread-safe Sets in Java

There seems to be a lot of different implementations and ways to generate thread-safe Sets in Java. Some ... straight everything from the Java Std Docs. Question&Answers:os...

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

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716 views

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concurrency - Is x86 CMPXCHG atomic, if so why does it need LOCK?

The Intel documentation says This instruction can be used with a LOCK prefix to allow the instruction to be ... was to support such lock-free operations.) Question&Answers:os...

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

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618 views

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concurrency - List<Future> to Future<List> sequence in Java

I am trying to convert List<CompletableFuture<X>> to CompletableFuture<List<T>>. This is quite useful as ... The accepted answer should also take this point. Question&Answers:os...

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

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596 views

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concurrency - Is there a way for multiple processes to share a listening socket?

In socket programming, you create a listening socket and then for each client that connects, you get a ... to build a correct and scalable implementation. Question&Answers:os...

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

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621 views

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concurrency - SSE instructions: which CPUs can do atomic 16B memory operations?

Consider a single memory access (a single read or a single write, not read+write) SSE instruction on an x86 CPU. The ... ! 1101 0 0 1110 0 0 1111 1719 99975389 Question&Answers:os...

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

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1.0k views

1 answer

concurrency - Custom thread pool in Java 8 parallel stream

Is it possible to specify a custom thread pool for Java 8 parallel stream? I can not find it anywhere. Imagine that I have ... divisor -> n % divisor == 0); } } Question&Answers:os...

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

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662 views

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concurrency - What is a good pattern for using a Global Mutex in C#?

The Mutex class is very misunderstood, and Global mutexes even more so. What is good, safe pattern to ... with cases where other processes abandon the mutex Question&Answers:os...

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

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590 views

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concurrency - Is JavaScript guaranteed to be single-threaded?

JavaScript is known to be single-threaded in all modern browser implementations, but is that specified in ... assume that JavaScript is always single-threaded? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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665 views

1 answer

concurrency - Simulating single action in parallel with recurring actions in Jmeter

Suppose I've 50 users. I want the load of 49 users on the website in parallel with 50th user who ... 65841006/simulating-single-action-in-parallel-with-recurring-actions-in-jmeter...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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concurrency - How to run concurrent Jenkins builds only if the jobs are running on different node labels?

I have a Jenkins pipeline that runs a test suite. It takes in a parameter, node-label, to determine which ... -jenkins-builds-only-if-the-jobs-are-running-on-different-n...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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618 views

1 answer

concurrency - What is the hidden queue in monitor implementation using semaphores?

I am trying to solve this question and need some help about monitor implementation using semaphores. Question: ... -is-the-hidden-queue-in-monitor-implementation-using-semaphores...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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675 views

1 answer

concurrency - Why MongoDB support transaction?

WiredTiger supports document-level concurrency, so operation will be rejected if another user accesses the ... stackoverflow.com/questions/65896046/why-mongodb-support-transaction...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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595 views

1 answer

concurrency - Understanding goroutines

I'm trying to understand concurrency in Go. In particular, I wrote this thread-unsafe program: ... from:https://stackoverflow.com/questions/10095751/understanding-goroutines...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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614 views

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concurrency - Understanding goroutines

I'm trying to understand concurrency in Go. In particular, I wrote this thread-unsafe program: ... from:https://stackoverflow.com/questions/10095751/understanding-goroutines...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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854 views

1 answer

concurrency - Why is there no scheduled cached thread pool provided by the Java Executors class?

Executors provides newCachedThreadPool() and newScheduledThreadPool(), but not newCachedScheduledThreadPool(), what gives here? ... thread-pool-provided-by-the-java-executors-clas...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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753 views

1 answer

concurrency - Why is there no scheduled cached thread pool provided by the Java Executors class?

Executors provides newCachedThreadPool() and newScheduledThreadPool(), but not newCachedScheduledThreadPool(), what gives here? ... thread-pool-provided-by-the-java-executors-clas...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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605 views

1 answer

concurrency - Priority in Go select statement workaround

I wish to have a go routine listening on two channels, blocked when both channels are drained. However ... .com/questions/11117382/priority-in-go-select-statement-workaround...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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652 views

1 answer

concurrency - Priority in Go select statement workaround

I wish to have a go routine listening on two channels, blocked when both channels are drained. However ... .com/questions/11117382/priority-in-go-select-statement-workaround...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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