Odd-Even Transposition Sort #769
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This is a modified bubble sort meant to work with multiple processors. Since this is running on a single thread, it has the same running time as bubble sort.
This implementation uses multiprocessing to perform the swaps at each step of the algorithm simultaneously.
poyea approved these changes Jun 7, 2019
| @CharlesRitter |
cclauss added help wanted awaiting changes 
XuehaiPan reviewed May 2, 2024
Comment on lines +13 to +16
| from multiprocessing import Process, Pipe, Lock | ||
| | ||
| #lock used to ensure that two processes do not access a pipe at the same time | ||
| processLock = Lock() |
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@cclauss We can use the spawn method to start the subprocess. The spawn method is considered safer than the fork method. We will get a warning for the fork method in Python 3.12+.
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| from multiprocessing import Process, Pipe, Lock | |
| #lock used to ensure that two processes do not access a pipe at the same time | |
| processLock = Lock() | |
| from multiprocessing import Process, Pipe, Lock, set_start_method | |
| set_start_method("spawn", force=True) # set the start method before using the context in `Lock()` below | |
| #lock used to ensure that two processes do not access a pipe at the same time | |
| processLock = Lock() |
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Nice! Can you please make this a pull request?
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I opened a PR to resolve this.
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Here are single and multi-threaded implementations of Odd-Even transposition sort.
It is an O(n) sorting algorithm that performs its swaps simultaneously.
https://en.wikipedia.org/wiki/Odd%E2%80%93even_sort