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Software

AMD FX-8150 With The Open64 5.0 Compiler

The Open64 5.0 compiler was released earlier this month with many changes, among the prominently noted items were greater optimizations for AMD's Bulldozer CPUs. In this article is a first-look at the Open64 5.0 compiler performance compared to its earlier release, as tested on an AMD FX-8150 eight-core "Bulldozer" processor.
25 November 2011 - 38 Comments

Awkward Linux Power Management With Xen

If you happen to be running a Linux system with Xen support enabled, beware there may be odd behavior with the Linux kernel's power management -- it can easily move in either direction.
21 November 2011 - 7 Comments

What People Are Saying About GNOME [Part 3]

The GNOME 2011 User Survey is still going on, so be sure to participate. For those wanting to know what other Linux desktop users are saying about the GNOME3 desktop environment, here's one thousand more comments.
19 November 2011 - 76 Comments

AMD Bulldozer "bdver1" Compiler Performance

It is time for another round of compiler benchmarks on AMD's latest FX-8150 Bulldozer processor. In this article is comparing the GCC 4.6.1, GCC 4.7 development, Open64 4.2.4, and AMD Open64 4.2.5.2 compilers in their stock configuration, when the binaries are built again but with the march/mtune flags set to "bdver1", and a third when being built with the "bdver1" architecture and tuning flags along with "-Ofast" for the highest-level of compiler optimizations.
15 November 2011 - 8 Comments

A Proper Solution To The Linux ASPM Problem

At long last, it looks like there is an adequate solution to the Active State Power Management (ASPM) problem in the Linux kernel , a.k.a. the well-known and wide-spread power regression in the Linux 2.6.38 kernel, which has been causing many laptops to go through significantly more power than they should. This is not another workaround, but rather a behavioral change in the kernel to better decide when the PCI Express ASPM support should be toggled.
11 November 2011 - 40 Comments

GCC 4.6, LLVM/Clang 3.0, Open64 Benchmarks

For those interested by last week's articles on the AMD Bulldozer benchmarks of the GCC, Open64, and LLVM/Clang compilers and the FX-8150 compiler tuning, but curious to know how the new LLVM/Clang 3.0 and other compilers perform on other processors, here's some new test results. These tests are looking at GCC 4.6, LLVM/Clang 3.0-RC1, and AMD Open64 compilers on Intel Sandy Bridge and AMD Shanghai hardware.
7 November 2011 - 9 Comments

AMD Bulldozer Cache Aliasing Issue Fix

The "AMD F15h cache aliasing issue" fixes have landed, which address cache aliasing penalties for AMD Bulldozer (Family 15h) processors. This can lead to performance improvements for some workloads.
4 November 2011 - 3 Comments

Open64 Compiler Tuning On AMD Bulldozer FX-8150

After recently comparing the AMD Bulldozer with the GCC, Open64, and LLVM/Clang compilers, in this article is a look at the performance of AMD's Open64 compiler when using their recommended compiler tuning options for Bulldozer when building software.
2 November 2011 - 15 Comments

Ubuntu 11.10: Xen vs. KVM vs. VirtualBox

While last week I showed how Ubuntu's performance has evolved as a KVM guest from Ubuntu 8.04 through Ubuntu 11.10, in today's article is a Linux virtualization showdown between VirtualBox, Xen, and KVM while using Ubuntu 11.10 on the Linux 3.0 kernel.
31 October 2011 - 27 Comments

What People Are Saying About GNOME [Part 2]

A few days ago I shared the first one thousand comments about the GNOME desktop from the 2011 GNOME User Survey. Here's now the next set of one thousand comments concerning the state of GNOME in the eyes of end-users.
30 October 2011 - 15 Comments

440 software articles published on Phoronix.
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