24-Way NVIDIA/AMD GPU Benchmarks With X-Plane 11

With the next update to X-Plane 11 introducing VR support, I have renewed interest in this realistic, cross-platform flight simulator. It's been a few years since we last delivered any benchmarks with X-Plane, but for your viewing please today is an assortment of 24 graphics cards both old and new, low-end to high-end from NVIDIA and AMD in looking at how this flight simulator is running on Ubuntu Linux.

101 Minutes Ago - Linux Gaming - 5 Comments
KDE's Discover Snap Support Is Maturing Too

While KDE Discover's Flatpak support was declared "production ready", that isn't the only app sandboxing tech they are working on: their Ubuntu Snap support is also coming together nicely.

9 Hours Ago - KDE - Discover Snap - 6 Comments
Benchmarking Retpoline Underflow Protection With Intel Skylake/Kabylake

Beyond the Retpoline support already found in the mainline Linux kernel, developers are working on Retpoline Underflow support that would be used for Intel Skylake and Kabylake CPUs. RETPOLINE_UNDERFLOW protects against falling back to a potentially poisoned indirect branch predictor when a return buffer underflows and this additional protection is needed for Intel Skylake/Kabylake processors. I ran a couple benchmarks.

9 Hours Ago - Intel - RETPOLINE_UNDERFLOW - 5 Comments

16 January

Benchmarking Retpoline-Enabled GCC 8 With -mindirect-branch=thunk

We have looked several times already at the performance impact of Retpoline support in the Linux kernel, but what about building user-space packages with -mindirect-branch=thunk? Here is the performance cost to building some performance tests in user-space with -mindirect-branch=thunk and -mindirect-branch=thunk-inline.

16 January 04:00 PM EST - Software - 5 Comments
Retpoline Support Backport Lands In GCC 7

The backporting of -mindirect-branch, -mindirect-return and -mindirect-branch-register, a.k.a. the GCC "Retpoline" patches, have been back-ported and merged into the GCC 7 branch.

16 January 07:35 AM EST - GNU - Retpoline GCC 7 - Add A Comment

15 January

16-Way GPU Comparison With NVIDIA GPUs Going Back To Kepler

Last week I provided a fresh look at the NVIDIA GeForce vs. AMD Radeon Linux gaming performance using the latest drivers at the start of 2018. That testing included the latest NVIDIA and AMD GPUs, but for those curious how these numbers compare for older NVIDIA GPUs, here's a look with the Kepler and Maxwell graphics cards added to the comparison.

15 January 02:17 PM EST - Linux Gaming - 14 Comments
Intel's Mesa Driver Is A Step Closer To ARB_gl_spirv Support

Igalia has sent out the fourth version of their patches for wiring in ARB_gl_spirv support into the Mesa OpenGL driver. This extension is the last main blocker from Intel having OpenGL 4.6 support and allows for SPIR-V ingestion support for better interoperability between OpenGL and Vulkan.

15 January 11:22 AM EST - Mesa - SPIR-V Ingestion - Add A Comment
Vulkan 1.0.68 Published

Coming just over one week since Vulkan 1.0.67 is now the Vulkan 1.0.68 graphics/compute programming specification update.

15 January 10:27 AM EST - Vulkan - Vulkan 1.0.68 - Add A Comment
ADATA XPG SX6000: Benchmarking A ~$50 USD 128GB NVMe SSD On Linux

While solid-state drives have generally been quite reliable in recent years and even with all the benchmarking I put them through have had less than a handful fail out of dozens, whenever there's a bargain on NVMe SSDs, it's hard to resist. The speed of NVMe SSDs has generally been great and while it's not a key focus on Phoronix (and thus generally not receiving review samples of them), I upgrade some of the server room test systems when finding a deal. The latest is trying an ADATA XPG SX6000 NVMe SSD I managed to get for $49.99 USD.

15 January 07:35 AM EST - Storage - 6 Comments

14 January

Benchmarking Ubuntu's Low-Latency Kernel & Liquorix Post-Meltdown

A new Phoronix Premium member was hypothesizing in the forums whether Ubuntu's low-latency kernel would be performing better in the wake of the Kernel Page Table Isolation (KPTI) support in the kernel for fending off the Meltdown CPU vulnerability. With always aiming to deliver on test requests by premium members, I ran some benchmarks of the Ubuntu low-latency vs. generic kernels and I also tossed in the Liquorix kernel for benchmarking too.

14 January 11:40 AM EST - Software - 28 Comments
Some Of What's Coming For Wayland's Weston 4.0 Compositor

Earlier this week ongoing Wayland/Weston release manager Bryce Harrington at Samsung laid out plans for Wayland 1.15 and Weston 4.0. There's been some push-back on the proposed dates to try to allow some more work to land in these upcoming six month releases to Wayland/Weston, but long story short, these next releases will be here in the near future.

14 January 08:29 AM EST - Wayland - Weston 4.0 - 7 Comments

13 January

Tweaking Ubuntu 17.10 To Try To Run Like Clear Linux

Even with the overhead of having both KPTI and Retpoline kernel support in place, our recent Linux distribution benchmarks have shown Intel's Clear Linux generally outperforming the more popular distributions. But if applying some basic performance tweaks, can Ubuntu 17.10 perform like Clear Linux? Here are some benchmarks looking at a few factors.

13 January 12:18 PM EST - Operating Systems - 22 Comments
GCC 8.0 vs. LLVM Clang 6.0 On AMD EPYC

At the beginning of January I posted some early LLVM Clang 6.0 benchmarks on AMD EPYC while in this article is comparing the tentative Clang 6.0 performance to that of the in-development GCC 8.0. Both compilers are now into their feature freeze and this testing looked at the performance of generated binaries both for generic x86_64 as well as being tuned for AMD's Zen "znver1" microarchitecture.

13 January 08:20 AM EST - Software - 10 Comments
Linux Graphics Trends Over The Past Five Years

Yesterday I posted some Linux hardware statistics going back to 2011 using data collected by the Phoronix Test Suite and OpenBenchmarking.org. Those yearly metrics hadn't contained any GPU/driver data, but here are those numbers.

13 January 07:25 AM EST - Hardware - Statistics - 4 Comments

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