Questions tagged [concurrency]
In computer science, concurrency is a property of systems in which multiple computations can be performed in overlapping time periods. The computations may be executing on multiple cores in the same chip, preemptively time-shared threads on the same processor, or executed on physically separated processors.
concurrency
23,049
questions
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Non blocking Processbuilder output
When using ProcessBuilder, is there a true non blocking reactive way to consume the output? By true non blocking i mean not creating a thread that is blocked waiting to read, but push-based like ...
- 361
-1
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0
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24
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How to use Monitor from Java Thread Class [closed]
I have some difficoult to implements the logic of concurrent develope based on Operating System Theory. I don't know how to divede my work to finalize in a correct solution, I know that will be ever a ...
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21
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Adding Thread.sleep in spring boot web app adding delays to subsequent requests [duplicate]
@RestController
public class HomeController {
@GetMapping("/")
public String greet() throws InterruptedException {
System.out.println(Thread.currentThread().getName());
...
- 1
0
votes
2
answers
59
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Java concurrency without using Thread or ExecutorService [closed]
There is this task that was given to me to do and I have tried all my best but couldn't be able to achieve it. The task is to write a Java Program that will produce a pancake and at the same time ...
- 357
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1
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20
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stale element reference exception occur on some ocassions
I am conducting performance testing to measure the response time of suppliers' results for a flight search application using Selenium with Java and TestNG. I have utilized invocation count and thread ...
- 1
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20
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ThreadPoolExecutor slows down while running
I have a list of arguments that can be executed in any order. I have written one function to parse and write to an S3 bucket. The function output is a CSV file that's written to the bucket.
def func(...
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0
answers
46
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How to reduce cache miss in SPSC queue pop function?
I am working on optimizing a Single Producer Single Consumer (SPSC) queue in C++. The following is the miniman reproducible example for my implementation:
#include <atomic>
#include <cstddef&...
- 11
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1
answer
20
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Lambda Provisioned Concurrency showing 0 available. But I'm not using any
I have been using my AWS account for more than 4 months. Now, I need to create a Lambda function with provisioned concurrency. However, it gives the following error:
```The maximum allowed provisioned ...
-1
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Is this ThreadPool implementation correct?
I am new to concurrent coding and trying to implement simple ThreadPool by myself. I found this implementation on a learning website(jenkov.com) and it seems to be working fine.
However, I think ...
- 99
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28
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Synchronizing method access based on instance-specific criteria in Java [closed]
I have a Java application where multiple threads are executing methods on different instances of a class (RepositoryA). Each instance of RepositoryA performs database operations (upsert method) based ...
- 13
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votes
1
answer
43
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Performance in Go: Mutex vs RWMutex
There are two types of mutex in Go: Mutex and RWMutex
Mutex offers func Lock() and func Unlock().
RWMutex offers those functions plus func RLock() and func RUnlock().
From what I understand, we ...
- 467
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1
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44
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Cannot read from Go channel after closing it [closed]
I am learning concurrency with Go and I've been facing an issue to build a simple concurrent web crawler. The crawling happens in a goroutine (crawl) that is called as many times as the number of URLs ...
- 101
1
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1
answer
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NextJS Server Actions usage in NextJS API endpoints - concurrent or not?
As I learned by doing: NextJS Server Actions are synchronous.
I want to achieve concurrency; and I like the syntax of having this abstracted; therefore I've created a NextJS API endpoint that has the ...
- 434
0
votes
1
answer
15
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Jmeter Concurrency call making
I need to trigger a same API 30 times in a second from which only 20 will trigger successfully remaining will failed as we have allowed 20 requests at a time to trigger if it is sent concurrently. ...
- 31
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1
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GO Cond - fmt.Println after wg.Done ended up dead lock
Unable to understand this dead lock situation in golang, i have below to go code with pub and sub pattern
package main
import (
"fmt"
"sync"
)
func main() {
cond := ...
- 1,593