Radeon 2D Performance On Fedora 21: EXA vs. GLAMOR
Written by Michael Larabel in Fedora on 28 September 2014 at 09:51 AM EDT. 1 Comment
FEDORA --
Here's some benchmarks done of the open-source Radeon driver stack in Fedora 21 to compare the performance of the EXA and GLAMOR 2D acceleration methods.

These quick weekend benchmarks were comparing EXA and GLAMOR on the Radeon HD 6870 graphics card. The Radeon HD 7000 series hardware and newer (with RadeonSI Gallium3D) only supports GLAMOR -- 2D over OpenGL -- for 2D acceleration. The Radeon HD 6000 series hardware and older meanwhile has the dedicated 2D code-paths to support EXA by default while GLAMOR can be enabled via the xorg.conf if you wish. Fedora 21 has the X.Org Server 1.16 release and with its post-alpha updates was the Linux 3.17 nodebug Rawhide kernel.


While the old Radeon EXA code used to have major performance wins over GLAMOR, thanks to GLAMOR continuing to be optimized (with most of that work being done by Intel), the performance of EXA vs. GLAMOR in these tests is fairly close. Find all of the system information and benchmark results via 1409269-LI-2DFEDORA286.
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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 10,000 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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