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NVIDIA Publishes Code For X Synchronization Fences

NVIDIA

Published on 28 June 2010 08:28 PM EDT
Written by Michael Larabel in NVIDIA
133 Comments

While NVIDIA may not release specifications for the GPU hardware or support any open-source drivers for their graphics processors after dropping their open-source X.Org driver, they do contribute a bit to the development of the X.Org Server. NVIDIA engineers like Aaron Plattner have contributed various patches and fixes against the server in the past and for features like VDPAU for DRI2. This afternoon there's a big patch-set coming out of NVIDIA that touches several X components. This set of patches adds support for X Synchronization Fences.

NVIDIA has been working on X Synchronization Fences for a while and was publicly talked about at least year's X Developers' Summit by Aaron Plattner, but now they are ready with a code drop for this new type of X Synchronization counters. As said in the mailing list announcement, the new X Synchronization Fences "can be used to synchronize X rendering with direct rendering X clients such as OpenGL and vice versa. They are especially useful in synchronizing GL-based composite managers┬╣ screen updates with Xs rendering."

NVIDIA's X Synchronization Fences support requires changes to the X Server, xextproto, libXext, damageproto, and libXdamage. NVIDIA's James Jones is also working on XCB support. NVIDIA is hoping the X Synchronization Fences will be ready to merge in X.Org Server 1.10.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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