Bug 53849 – Run UDM REST API in PyPy

Bug 53849 - Run UDM REST API in PyPy


Summary:	Run UDM REST API in PyPy

Status:	NEW

Product:	UCS
Classification:	Unclassified
Component:	UDM - REST API
Version:	UCS 5.0
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	---
Assigned To:	UMC maintainers
QA Contact:	UMC maintainers

URL:
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Depends on:	50050
Blocks:
	Show dependency tree / graph

Reported:	2021-09-29 08:59 CEST by Daniel Tröder
Modified:	2021-09-30 14:55 CEST (History)
CC List:	4 users (show)

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What kind of report is it?:	Bug Report
What type of bug is this?:	2: Improvement: Would be a product improvement
Who will be affected by this bug?:	2: Will only affect a few installed domains
How will those affected feel about the bug?:	2: A Pain – users won’t like this once they notice it
User Pain:	0.046
Enterprise Customer affected?:
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Description Daniel Tröder

2021-09-29 08:59:45 CEST

+++ This bug was initially created as a clone of Bug #50050 +++

The UDM HTTP API service uses only 1 process. Under medium load UDM is CPU-bound, and thus the UDM HTTP API cannot deliver speedups available in multi-cpu/core systems.

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As UDM, and thus the UDM REST API, is CPU bound, executing it in PyPy (https://www.pypy.org/) can make it run up to 4 times faster with relatively small modifications.
Of cause that means not only adapting the UDM REST API to execute in PyPy, but also all UDM modules and hooks.

It could be worth it, to at least create a PoC to see possible speed improvements.

Comment 1 Florian Best

2021-09-29 09:04:35 CEST

We would need to execute tests for all UDM modules, hooks, syntaxes with pypy.
Sometimes pypy has some obscure differences to cpython.

Comment 2 Daniel Tröder

2021-09-30 14:55:06 CEST

Yes, such a test suite would be required.
It would be worth creating it for environments with high performance requirements.