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NVIDIA Tries To Put Fence Sync Into X Server 1.10

NVIDIA

Published on 02 December 2010 01:12 PM EST
Written by Michael Larabel in NVIDIA
35 Comments

X.Org Server 1.10 was just looking to be a big bug-fix release to the X.Org Server with no major features being introduced, up until the merge window was about to be closed. Then last night it was proposed by Keith Packard, the xorg-server 1.10 release manager, to keep it open a few extra days so that he could finally merge the per-CRTC pixmap support. This work alone is nice and is long awaited, but now NVIDIA's James Jones is calling for pulling another feature that's had code available for months: X Synchronization Fences.

X Synchronization Fences have been talked about for well over a year and it comes down to allowing the synchronization of X rendering with direct rendering X clients, such as to allow synchronizing OpenGL-based compositing manager screen updates with X rendering. The patches for this were published by NVIDIA back in June and then went through two revisions since, with the last one coming about one month ago.

James writes to the xorg-devel list, "As I mentioned early on, I really want to get the fence sync work in server 1.10...If these remaining pieces get reviewed, I can send out pull requests for everything immediately. I've had this code out for review in some form for about 3 months now, so it'd be pretty disappointing if it had to sit around waiting for another release cycle."

Seeing as NVIDIA's X synchronization code has effectively been ready for months and under public review, where as the per-CRTC pixmap code is not even quite finished yet nor has gone through formal code review, hopefully this code will still make it in. This morning, Keith also pulled in Nokia's X-Video RePut work.

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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