Language Selection

English French German Italian Portuguese Spanish

Another Major Linux Power Regression Spotted

Filed under

Since Friday there's been a number of Phoronix articles about a very bad power regression in the mainline Linux kernel, which is widespread, Ubuntu 11.04 is one of the affected distributions, and has been deemed a bug of high importance. This yet-to-be-resolved issue is affected Linux 2.6.38 and 2.6.39 kernels and for many desktop and notebook systems is causing a 10~30% increase in power consumption. Nevertheless, this is not the only major outstanding power regression in the mainline tree, there is another dramatic regression now spotted as well that is yet-to-be-fixed.

Since the discovery last week of the Linux 2.6.38 and 2.6.39 kernels going through excessive amounts of power compared to 2.6.37 and earlier, each day and practically all day since that time has been working on Linux power consumption tests. Power consumption benchmarks are not normally an area we focus on nor do many others, but since the inadvertent discovery of it when testing out the power consumption of past Ubuntu Linux releases, a lot of time has spent investigating the matter within the kernel. In order to do such, there's been continued improvements to the Phoronix Test Suite, Phoromatic,, and the PTS Commercial scripts for better enhancing the power testing, more improvements to multi-point automated regression bisecting, etc. The Phoronix Test Suite has already been able to monitor and log the power consumption (along with temperatures, fan speeds, I/O wait, system load, etc) for any test profile/suite being run by using the system monitor module, but now there is more. Thanks to working on that Easter weekend, coming to fruition because of that today is the discovery of another regression while still working on finding the first commit causing a power regression.

rest here

More in Tux Machines

TheSSS 20.0 Server-Oriented Linux Distro Ships with Linux Kernel 4.4.17, PHP 5.6

4MLinux developer Zbigniew Konojacki informs Softpedia today, October 26, 2016, about the release and immediate availability of version 20.0 of his server-oriented TheSSS (The Smallest Server Suite) GNU/Linux distribution. Read more

Ubuntu 17.04 (Zesty Zapus) Daily Build ISO Images Are Now Available for Download

Now that the upcoming Ubuntu 17.04 (Zesty Zapus) operating system is officially open for development, the first daily build ISO images have published in the usual places for early adopters and public testers. Read more

Today in Techrights

OSS Leftovers

  • Chain Releases Open Source Blockchain Solution for Banks
    Chain, a San Francisco-based Blockchain startup, launched the Chain Core Developer Edition, which is a distributed ledger infrastructure built for banks and financial institutions to utilize the Blockchain technology in mainstream finance. Similar to most cryptocurrency networks like Bitcoin, developers and users are allowed to run their applications and platforms on the Chain Core testnet, a test network sustained and supported by leading institutions including Microsoft and the Initiative for Cryptocurrency and Contracts (IC3), which is operated by Cornell University, UC Berkeley and University of Illinois.
  • Netflix Upgrades its Powerful "Chaos Monkey" Open Cloud Utility
    Few organizations have the cloud expertise that Netflix has, and it may come as a surprise to some people to learn that Netflix regularly open sources key, tested and hardened cloud tools that it has used for years. We've reported on Netflix open sourcing a series of interesting "Monkey" cloud tools as part of its "simian army," which it has deployed as a series satellite utilities orbiting its central cloud platform. Netflix previously released Chaos Monkey, a utility that improves the resiliency of Software as a Service by randomly choosing to turn off servers and containers at optimized tims. Now, Netflix has announced the upgrade of Chaos Monkey, and it's worth checking in on this tool.
  • Coreboot Lands More RISC-V / lowRISC Code
    As some early post-Coreboot 4.5 changes are some work to benefit fans of the RISC-V ISA.
  • Nextcloud Advances with Mobile Moves
    The extremely popular ownCloud open source file-sharing and storage platform for building private clouds has been much in the news lately. CTO and founder of ownCloud Frank Karlitschek resigned from the company a few months ago. His open letter announcing the move pointed to possible friction created as ownCloud moved forward as a commercial entity as opposed to a solely community focused, open source project. Karlitschek had a plan, though. He is now out with a fork of ownCloud called Nextcloud, and we've reported on strong signs that this cloud platform has a bright future. In recent months, the company has continued to advance Nextcloud. Along with Canonical and Western Digital, the partners have launched an Ubuntu Core Linux-based cloud storage and Internet of Things device called Nextcloud Box, which we covered here. Now, Nextcloud has moved forward with some updates to its mobile strategy. Here are details.
  • Using Open Source for Data
    Bryan Liles, from DigitalOcean, explains about many useful open source big data tools in this eight minute video. I learned about Apache Mesos, Apache Presto, Google Kubernetes and more.