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2D Tiling For AMD's RadeonSI Is Stacking Up

AMD

Published on 08 April 2013 04:06 PM EDT
Written by Michael Larabel in AMD
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Building upon last week's RadeonSI tiling patches for exposing this performance-boosting feature on the latest generation of AMD Radeon HD graphics hardware is the xf86-video-ati work. With a new patch, 2D tiling can be turned on for Radeon HD 7000 series GPUs on the open-source Linux driver.

Published last week and still baking were the "RadeonSI" tiling changes as they affect the Linux kernel with the Radeon DRM, the libdrm library, and the RadeonSI Mesa Gallium3D driver. Jerome Glisse has now put out the small xf86-video-ati patch for flipping on 2D color tiling within the Radeon X.Org driver.

The patch can be found on the xorg-driver-ati list. With a patched Radeon DDX, the ColorTiling2D option inside the xorg.conf needs to be set for actually turning on the feature.

It will likely be some time before the tiling feature is enabled by default for RadeonSI since the support needs to first be merged into the mainline Linux kernel (likely the Linux 3.10 kernel), the DDX is already dependent upon the new version of libdrm for building, and it also needs to appear within a released version of Mesa. The Mesa release will likely be Mesa 10.0, which isn't due out for about another half-year.

While I haven't yet run any RadeonSI tiling performance benchmarks, I do have R600g color tiling benchmarks that show off the performance gains for older generations of ATI/AMD Radeon graphics hardware.

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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