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OpenBenchmarking.org

More Mesa 10.2 + Linux 3.14 Benchmarks On Ubuntu 14.04 LTS

Mesa

Published on 02 March 2014 11:30 AM EST
Written by Michael Larabel in Mesa
9 Comments

In verifying and complementing the major R600/RadeonSI performance regressions noted earlier today for a wide-range of AMD Radeon hardware, here's some more tests that were done this weekend on a different system that also finds the newer code to be running slower than Linux 3.13 + Mesa 10.1

Read that earlier article for more details. Since then, Phoronix readers were quick to point out that HyperZ is now disabled by default for the R600 and RadeonSI Gallium3D drivers. HyperZ is known to provide significant performance improvements but is now disabled by default over apparent issues with some Linux games on some hardware. Now to have HyperZ and its benefits you will need to set the R600_DEBUG=hyperz environment variable.

However, this doesn't appear to be the only cause for the performance drop when upgrading Ubuntu 14.04's graphics stack. Other regressions have also been reported by other users of the open-source AMD driver. "This is not completely from HyperZ and so still worth investigating. We have reports from Luke and dungeon on this forum that confirm there's another regression besides the intended hyperz change. Luke specifically tested it, dungeon's case is media apps that do not use the Z buffer." There's more comments in this forum post about the issue unrelated to HyperZ.

Anyhow, on an older AMD Opteron system with Radeon HD 4870 graphics I am in the process of testing every Ubuntu Linux releases where there's hardware support available and ultimately going back far enough to test the legacy Catalyst driver that supports the Radeon HD 4870 "RV770" graphics card. This article should provide a nice look at how the open-source performance has evolved and how it's running against the legacy Catalyst driver. Yesterday though I ran a similar Ubuntu 14.04 Linux 3.13 + Mesa 10.1 vs. Linux 3.14 + Mesa 10.2 graphics benchmark on this Opteron 2384 + Radeon HD 4870 system and found similar results.

For those curious about those extra results from yesterday, you can find them on OpenBenchmarking.org via 1403016-PL-UBUNTUTES16.

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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