Bug 99886

Summary:	[radv] No actual multithreading in a Vulkan multithreading demo
Product:	Mesa	Reporter:	Jan Ziak (http://atom-symbol.net) <0xe2.0x9a.0x9b>
Component:	Drivers/Vulkan/radeon	Assignee:	mesa-dev
Status:	RESOLVED INVALID	QA Contact:	mesa-dev
Severity:	normal
Priority:	medium	CC:	mike
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Jan Ziak (http://atom-symbol.net) 2017-02-21 14:16:35 UTC

Steps to reproduce the issue:

1. Clone and compile https://github.com/SaschaWillems/Vulkan
2. cd bin
3. ./multithreading

Expected CPU usage on a quad-core CPU: 400%
Actual CPU usage on a quad-core CPU: 100%

Comment 1 david becerra 2017-02-21 19:49:54 UTC

on anv the load is distributed beetwen cores
but it is gpu bound so no core reaches 50% :/

what does the demo say using 4 threads, 1...

Comment 2 Mike Lothian 2017-02-21 20:51:30 UTC

If you use atop it's easier to see that the load is spread over all cores evenly

Confirmed the demo is working fine here with radv and each core adds up to ~100% usage

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