Bug 99886 - [radv] No actual multithreading in a Vulkan multithreading demo
Summary: [radv] No actual multithreading in a Vulkan multithreading demo
Status: RESOLVED INVALID
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/Vulkan/radeon (show other bugs)
Version: git
Hardware: Other All
: medium normal
Assignee: mesa-dev
QA Contact: mesa-dev
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-02-21 14:16 UTC by Jan Ziak (http://atom-symbol.net)
Modified: 2017-02-21 23:19 UTC (History)
1 user (show)

See Also:
i915 platform:
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Attachments

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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