Language Selection

English French German Italian Portuguese Spanish

Another Major Linux Power Regression Spotted

Filed under
Linux

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, OpenBenchmarking.org, 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

Linux Devices

  • MediaTek Announces An Interesting Deca-Core ARM Dev Board
    The folks at MediaTek in Hsinchu announced the Helio X20 Development Board today as the first development board using a tri-cluster, deca-core design. As implied by the name, this developer board is using the Helio X20 SoC, which features a tri-cluster CPU architecture and ten processing cores: two Cortex-A72 at 2.3GHz, four Cortex-A53 cores @ 2.0GHz, and four Cortex-A53 cores at 1.4GHz. Depending upon system load, the relevant/needed cores will power up. The X20 uses ARM's Mali graphics, supports 2 x LPDDR3 POP memory, and has integrated 802.11ac WiFi.
  • Voice control your embedded systems with 20 lines of software code
    Speech recognition software technology provider Sensory is offering TrulyHandsfree SDK to embed voice enabled functions in your embedded systems software. TrulyHandsfree SDK supports fixed triggers, user enrolled triggers and commands phrase spotting technology.
  • No SSD Storage On Raspberry Pi 3? Try MinnowMax Turbot Board
    The fact that you can not use an SSD storage device with the Raspberry Pi is a huge drawback. Devices that use the Raspberry pie consume a lot of storage. Devices like drones etc could use the onboard SSD storage. Too bad that the Raspberry pi 3 does not support it. But no worries have you head of the MinnowMax Turbot board?

Server Administration

  • Why Container Skills Aren't a Priority in Hiring Open Source Pros (Yet)
    It should come as no surprise that open source training and hiring is typically predicated on what skills are trending in tech. As an example, Big Data, cloud and security are three of the most in-demand skillsets today, which explains why more and more open source professionals look to develop these particular skillsets and why these professionals are amongst the most sought after. One skillset that employers have not found as useful as professionals is container management.
  • All Hail the New Docker Swarm
    Unfortunately, I’m not able to attend DockerCon US this year, but I will be keeping up with the announcements. As part of the Docker Captains program, I was given a preview of Docker 1.12 including the new Swarm integration which is Docker’s native clustering/orchestration solution (also known as SwarmKit, but that’s really the repo/library name). And it’s certainly a big change. In this post I’ll try to highlight the changes and why they’re important.
  • Apache Spark Creator Matei Zaharia Describes Structured Streaming in Spark 2.0 [Video]
    Apache Spark has been an integral part of Mesos from its inception. Spark is one of the most widely used big data processing systems for clusters. Matei Zaharia, the CTO of Databricks and creator of Spark, talked about Spark's advanced data analysis power and new features in its upcoming 2.0 release in his MesosCon 2016 keynote.

The heartbeat of open source projects can be heard with GitHub data

GitHub released charts last week that tell a story about the heartbeat of a few open source, giving insights into activity, productivity and collaboration of software development. Why are these important? Enterprises increasingly define software development as a top priority to gain competitive advantage or defend against disruption. They often turn to open source software because it is fast and agile. Enterprise IT decision makers should understand GitHub because it is the backbone of most open source projects. Read more

Linux Foundation Certified System Administrator: Lorenzo Paglia

The Linux Foundation offers many resources for developers, users, and administrators of Linux systems, including its Linux Certification Program. This program is designed to give you a way to differentiate yourself in a job market that's hungry for your skills. To illustrate how well these certifications prepare you for the real world, this series features some of those who have recently passed the certification exams. These testimonials should help you decide if either the Linux Foundation Certified System Administrator (LFCS) or the Linux Foundation Certified Engineer (LFCE) certification is right for you. In this installment, we talk with LFCS Lorenzo Paglia. Read more