All Questions
Tagged with concurrency goroutine
441
questions
0
votes
0
answers
47
views
Request Chunks from the peer in parallel in golang over a tcp connection
I'm building a P2P file transfer system in Go that fetches chunks of data from peers in parallel. While sequential requests work fine, parallel requests using goroutines behave inconsistently, ...
-1
votes
1
answer
52
views
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
1
vote
1
answer
98
views
Goroutine inside function
I've read https://go.dev/blog/pipelines and there're two functions:
// move numbers into a channel
func gen(nums ...int) <-chan int {
out := make(chan int)
go func() {
for _, n := ...
- 23
0
votes
0
answers
58
views
How many go routines will be created at runtime?
In an interview today, I got a problem to write a program with 2 goroutines to generate even and odd sequence and synchronize them to print the sequence of number.
Later, I was asked how many routines ...
- 19
-1
votes
2
answers
91
views
Why doesn't this Go code create a deadlock?
package main
import (
"fmt"
"sync"
"time"
)
var wg sync.WaitGroup
func main() {
ch := make(chan int) // Declare the channel inside main()
wg.Add(4)...
2
votes
1
answer
81
views
Go Program Stuck at syscall.Wait4 in Concurrent Forking Loop
I'm working on a Go program that creates child processes using syscall.RawSyscall(syscall.SYS_FORK) in a concurrent loop. Each child process needs to execute a command (/bin/ls) with specific seccomp ...
- 103
1
vote
0
answers
26
views
Executing Multiple Instances of Code Snippet at Specific Intervals Using Constant Timestamp
I need to run multiple instances of the same code snippet at regular intervals. For example, I want to run four instances, where the first instance starts executing 5 seconds after a constant ...
- 11
0
votes
1
answer
65
views
Why a Timer variable assigned with time.Afterfunc executes its function even though outer func exits
I have a forever loop that has a Timer variable that executes a function after some time.
package main
import (
fmt "fmt"
"time"
)
func exe() {
fmt.Println("10-...
- 247
-3
votes
1
answer
63
views
Why is this concurrent code slower than the serial code? (Go) [closed]
I wanted to try using a concurrent solution to problem 206 (Reverse a Linked List) on LeetCode, so I wrote this:
func reverseList(head *ListNode) *ListNode {
var prev, temp *ListNode
cur, ch :=...
1
vote
3
answers
536
views
Go using range to loop over channel, why does it terminate before receiving all the values?
This code is a modified version of a program from section 8.4 of "The Go Programming Language" book.
package main
import (
"fmt"
)
func main() {
naturals := make(chan int)
...
- 23
0
votes
2
answers
69
views
Simpler Golang Concurrency Pattern
I've been trying to make a function that makes multiple external api calls concurrent with the following in mind
return the first error encountered
aggregate the results of the api call
Here is my ...
0
votes
0
answers
75
views
What is a reasonable number of goroutines I should use to operate on a huge payload size?
I want to implement partial response in my server to be able to do something like this:
So, I have a function that's called:
func DoPartial[T any](payload []T, fields string...) []map[string]any {
/...
- 19
0
votes
0
answers
47
views
Golang concurrency deadlocks as soon as I add a channel for response
I got a function that is supposed to retrieve information in a goroutine and send it back to the channel as it finishes.
func getTopLikeSupporter(username string, session Session, session1 Session) ([]...
- 11
0
votes
0
answers
44
views
How to get rid of Go routine "process" after the GO routine times out?
I have an interesting challenge.
I have a go routine that should display an error message for 4 seconds or until I press any key.
If I press a key within the 4 seconds it works as expected but if I ...
- 11
-3
votes
1
answer
73
views
Why does this print 0?
i am experimenting with go concurrency and i was trying a few patterns.
i was trying this where you receive an array of elements, process them concurrently and sum all the results.
i am using 2 ...
