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Software

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

What People Are Saying About GNOME [Part 1]

Last week the 2011 GNOME User Survey began, which is an independent survey that was devised by members of the GNOME community to collect feedback on their desktop platform. With the GNOME Foundation not interested in hosting the survey, these survey creators came to Phoronix to host the survey. Some of the initial GNOME comments were shared shortly after the survey went live. This survey will be running for one month, but there were already more than 8,000 submissions in the first few days. Here's the first 1,000 comments provided by participants of the GNOME survey.
25 October 2011 - 46 Comments

GCC 4.5 vs. 4.6 On AMD's FX-4100 Bulldozer

In continuing from yesterday's AMD FX-4100 "Bulldozer" Linux benchmarks, here are more Ubuntu test results from this system comparing the stock GCC 4.5.2 and GCC 4.6.1 compilers for the new Bulldozer platform.
20 October 2011 - 37 Comments

Intel AES-NI For Full Disk Encryption

Last week I published benchmark results of using Intel AES-NI for Ubuntu home directory encryption, but the benefits of using this new x86 instruction set found on the latest Intel and AMD (as of today's Bulldozer launch) processors was minimal for this eCryptfs-based solution. Continuing in the AES-NI investigation under Linux, today are benchmark results when using AES-NI for full-disk encryption with dmcrypt.
12 October 2011 - 9 Comments

An Update On The Linux Power Situation In Ubuntu

While I was away for three weeks, there was an update on LP bug #760131, the infamous bug report on the power consumption being raised significantly higher in Ubuntu Natty. This bug report of high importance now indicates a fix being committed to Natty and a fix being released for Oneiric, but what has changed? Here is an update.
7 October 2011 - 13 Comments

446 software articles published on Phoronix.
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