Software Archives
The Performance Cost To SELinux On Fedora 31

Following the recent AppArmor performance regression in Linux 5.5 (since resolved), some Phoronix readers had requested tests out of curiosity in looking at the performance impact of Fedora's decision to utilize SELinux by default. Here is how the Fedora Workstation 31 performance compares out-of-the-box with SELinux to disabling it.

19 January 2020 - 22 Comments
Looking At The Linux Performance Two Years After Spectre / Meltdown Mitigations

Last week marked the two year anniversary since the formal public disclosure of the Spectre and Meltdown disclosures. To commemorate that anniversary, I was running some fresh benchmarks of various Intel desktop and server processors with the in-development Ubuntu 20.04 LTS to look at the performance impact today with the default CPU vulnerability mitigations and then again with the mitigations disabled at run-time.

13 January 2020 - 33 Comments
Chrome 79 Is Running Past Firefox 72 Performance On Linux

While no major performance improvements were noted as part of the release notes, given this week's Firefox 72 release here are some fresh benchmarks of Firefox 70/71/72 on Ubuntu Linux benchmarked with and without WebRender being enabled. As well, these numbers show how Firefox on Linux is currently stacking up against Google Chrome 79 as its latest stable release.

8 January 2020 - 35 Comments
GCC 10 Link-Time Optimization Benchmarks On AMD Threadripper

Stemming from the recent news in Fedora 32 potentially LTO'ing packages by default for better performance and not yet having checked on the Link-Time Optimization performance of the in-development GCC 10, here is a fresh look at the possible performance gains from making use of link-time optimizations for generating faster binaries. This round of testing was done on the AMD Ryzen Threadripper 3960X and is complementary to the recent Profile Guided Optimization benchmarks.

7 January 2020 - 29 Comments
One Of The Reasons Why Linux 5.5 Can Be Running Slower

Going back to the start of December with the Linux 5.5 merge window we have encountered several significant performance regressions. Over the weeks since we've reproduced the behavior on both Intel and AMD systems along with large and small CPUs. Following some holiday weekend bisecting fun, here is the cause at least partially for the Linux 5.5 slowdowns.

29 December 2019 - 56 Comments
Benchmarking Mozilla's Firefox Performance Over The Past Two Years

With 2019 quickly drawing to an end, I figured it would be interesting to see how the performance of Mozilla Firefox has been trending over the longer term. So for this article today is a look at the Firefox 57 through Firefox 71 stable performance plus tests of Firefox 72 beta and Firefox 73 alpha all from the same system and using a variety of browser benchmarks.

13 December 2019 - 31 Comments
Blender 2.81 Benchmarks On 19 NVIDIA Graphics Cards - RTX OptiX Rendering Performance Is Incredible

Last week marked the release of Blender 2.81 with one of the shiny new features being the OptiX back-end for the Cycles engine to provide hardware-accelerated ray-tracing with NVIDIA RTX graphics processors. Long story short, OptiX is much faster for Blender than using NVIDIA's CUDA back-end -- which already was much faster than the OpenCL support within Blender. For your viewing pleasure today are benchmarks of 19 different graphics cards looking at the CUDA performance from Maxwell to Pascal to Turing and then for the RTX graphics cards also the OptiX performance.

26 November 2019 - 34 Comments
The Combined Impact Of Mitigations On Cascade Lake Following Recent JCC Erratum + TAA

Following the initial tests earlier this month from the disclosures of the JCC Erratum (Jump Conditional Code) that required updated Intel CPU microcode to address and on the same day the TSX Async Abort (TAA) vulnerability that required kernel mitigations to address, which I have run benchmarks of those CPU performance impacts individually, readers have requested tests looking at the current overall impact to the mitigations to date.

24 November 2019 - 14 Comments
PHP 7.4 Performance Benchmarks Show A Nice Improvement - But PHP 8.0-dev Is Running Even Faster

PHP 7.4 is due to be released next week as the annual major iteration to PHP7. Like we have seen through the PHP7 releases, while new features continue to be tacked on for this popular web-based programming language the performance has continued evolving. Here are the latest benchmarks of PHP 5.6 through PHP 7.4 while also looking at the PHP 8.0-dev performance that is in development on Git master.

21 November 2019 - 17 Comments
Zombieload V2 TAA Performance Impact Benchmarks On Cascade Lake

While this week we have posted a number of benchmarks on the JCC Erratum and its CPU microcode workaround that introduces new possible performance hits, also being announced this week as part of Intel's security disclosures was "Zombieload Variant Two" as the TSX Async Abort vulnerability that received same-day Linux kernel mitigations. I've been benchmarking the TAA mitigations to the Linux kernel since the moment they hit the public Git tree and here are those initial benchmark results on an Intel Cascade Lake server.

14 November 2019 - 18 Comments
The Firefox + Chrome Web Browser Performance Impact From Intel's JCC Erratum Microcode Update

With yesterday's overview and benchmarks of Intel's Jump Conditional Code Erratum one of the areas where the performance impact of the updated CPU microcode exceeding Intel's 0~4% guidance was on the web browser performance. Now with more time having passed, here are more web browser benchmarks on both Chrome and Firefox while comparing the new CPU microcode release for the JCC Erratum compared to the previous release. Simply moving to this new CPU microcode does represent a significant hit to the web browser performance.

13 November 2019 - 21 Comments
The Disappointing Direction Of Linux Performance From 4.16 To 5.4 Kernels

With the Linux 5.4 kernel set to be released in the next week or two, here is a look at the performance going back to the days of Linux 4.16 from early 2018. At least the Linux kernel continues picking up many new features as due to security mitigations and other factors the kernel performance continues trending lower.

11 November 2019 - 99 Comments
A Quick Look At EXT4 vs. ZFS Performance On Ubuntu 19.10 With An NVMe SSD

For those thinking of playing with Ubuntu 19.10's new experimental ZFS desktop install option in opting for using ZFS On Linux in place of EXT4 as the root file-system, here are some quick benchmarks looking at the out-of-the-box performance of ZFS/ZoL vs. EXT4 on Ubuntu 19.10 using a common NVMe solid-state drive.

16 October 2019 - 55 Comments
PostgreSQL 12 Performance With AMD EPYC 7742 vs. Intel Xeon Platinum 8280 Benchmarks

One of the areas of performance I had been meaning to look more at following the recent AMD EPYC 7002 series launch was for database servers. With the original EPYC 7000 series performance, the performance came up short in competing with Intel Xeon CPUs, but for the EPYC Rome processors it ends up being a very different story. Given the launch last week of PostgreSQL 12, I've been trying out this new database server release on both EPYC and Xeon processors.

7 October 2019 - 5 Comments
Blender 2.80 & LuxCoreRender Performance With NVIDIA RTX SUPER Comparison

Complementing the 18-way NVIDIA GPU compute comparison from earlier this week with now having our hands on the RTX 2060/2070/2080 SUPER graphics cards, this round of NVIDIA Linux testing is looking at the Blender 2.80 and LuxCoreRender 2.1/2.2 performance for these popular rendering programs that offer CUDA acceleration.

4 October 2019 - 5 Comments
The Xeon vs. EPYC Performance With Intel's oneAPI Embree & OSPray Render Projects

With Intel seemingly ramping up work on their open-source OSPray portable ray-tracing engine now that they have pulled it under their oneAPI umbrella as part of a forthcoming rendering tool-kit, I figured it would be the latest interesting candidate for benchmarking of AMD EPYC 7742 vs. Intel Xeon Platinum 8280 performance. In addition, the Embree ray-tracing kernels are also being benchmarked as part of this performance comparison.

30 September 2019 - 14 Comments
Linux 5.4 Features Are Huge From exFAT To New GPUs To Enabling Lots Of New Hardware

The Linux 5.4 merge window is set to end today with the release of Linux 5.4-rc1. With the major pull requests in, here is a look at the prominent changes and new features coming with Linux 5.4. As is standard practice, there will be about eight weekly release candidates of Linux 5.4 prior to officially releasing this kernel as stable in late November or potentially early December depending upon how the cycle plays out.

29 September 2019 - 36 Comments
Phoronix Test Suite 9.0 Released With New Result Viewer, Offline/Enterprise Benchmarking Enhancements

Phoronix Test Suite 9.0 is now available as the latest quarterly feature release to our cross-platform, open-source automated benchmarking framework. With Phoronix Test Suite 9.0 comes a rewritten result viewer to offer more result viewing functionality previously only exposed locally via the command-line or through a Phoromatic Server (or OpenBenchmarking.org when results are uploaded), new offline/enterprise usage improvements, various hardware/software detection enhancements on different platforms, and a variety of other additions.

17 September 2019 - 5 Comments
AMD/Intel Benchmarks: Building The Mainline Linux x86_64 Kernel With LLVM Clang

With the upcoming LLVM Clang 9.0 compiler release there is an amazing achievement more than a decade in the making... The mainline Clang compiler can finally build the mainline Linux x86_64 kernel. The AArch64 state has been in better shape in recent years with multiple Arm vendors using Clang as their default compiler including to build the Linux kernel, but finally in 2019 the mainline Clang can build mainline Linux x86_64. There are a few caveats, but in this article is my experience in doing so with LLVM Clang and the Linux 5.3 kernel as well as running some preliminary benchmarks on AMD and Intel hardware.

12 September 2019 - 23 Comments
Firefox 69 / 70 Beta Against Chrome 76 On Ubuntu Linux

With Firefox 69 released and Firefox 70 entering beta, here are some fresh web browser benchmarks between Mozilla Firefox and Google Chrome from Ubuntu Linux. On the Firefox size, Firefox 68, 69, and 70 Beta were tested with and without WebRender being enabled and compared to Google's current Chrome 76 stable release.

6 September 2019 - 22 Comments
GCC vs. LLVM Clang vs. AOCC Compiler Benchmarks On The AMD EPYC 7742

While AMD's hardware folks were launching the EPYC 7002 series, their software crew was pushing out the AMD Optimizing C/C++ Compiler 2.0 with support/optimizations for the Zen 2 micro-architecture. Using the top-end AMD EPYC 7742 in a 2P Linux server configuration, here are C/C++ compiler benchmarks looking at the performance when built by the GNU Compiler Collection (GCC), LLVM Clang, and AOCC 2.0.

9 August 2019 - 15 Comments

698 software articles published on Phoronix.