AMDGPU Semaphores Support Getting Squared Away
Written by Michael Larabel in Radeon on 19 January 2016 at 10:30 PM EST. 3 Comments
The user-space side of semaphore support is getting taken care of for the new AMDGPU driver.

Landing today in Mesa DRM (libdrm) is the semaphore support for AMDGPU with this library that sits between the AMDGPU kernel DRM and the RadeonSI Gallium3D driver.

Details on the semaphore implementation for AMDGPU can be found via this Git commit. At last check, the AMDGPU DRM driver wasn't enabling semaphores support by default. Details on semaphore can be found from this forum thread and is not to be confused with the other semaphores: this article.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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