GLAMOR Is Getting More Cleanups In Aiming For Better Performance
Written by Michael Larabel in X.Org on 29 January 2016 at 06:57 AM EST. 3 Comments
X.ORG --
GLAMOR, the X.Org means of doing 2D acceleration over OpenGL, is going through a period of more clean-ups as Broadcom's Eric Anholt looks to further boost its performance on the Raspberry Pi VC4 driver.

Eric on Wednesday posted a set of 19 new patches for cleaning up GLAMOR as he's working towards better performance. He explained at the start of the patch series, "I've been working on vc4 X performance again, particularly looking at dragging windows with xcompmgr -c running. I'll be sending a separate patch to accelerate a8 rendering on GLES2-class renderers, but even with that things are crazy slow. I think at this point the major problem is the crazy mass of code from rel_sampler(). This series was some cleanups as I worked toward that, and finally one patch that should reduce the cost of rel_sampler on non-control-flow hardware (I see fewer texture sampler requests on vc4). No performance change on i965, but I hope that vc4 is in better shape after it."

This work -- and hopefully more improvements for GLAMOR -- will be part of the X.Org Server 1.19 release due out later this year.
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Michael Larabel is the principal author of Phoronix.com 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 OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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