Language Selection

English French German Italian Portuguese Spanish

Another Look At The Performance Impact To IBM's POWER9 L1d Flushing Change

Filed under
Graphics/Benchmarks

Last week I provided some benchmarks looking at the IBM POWER9 mitigation for the L1 data cache needing to be flushed upon entering the kernel and on user accesses due to a recently disclosed vulnerability. POWER9 allows speculatively operating on validated data in the L1 cache, but when it comes to incompletely validated data paired with other side channels it could lead to local users potentially obtaining improper access to data in the L1 data cache. When benchmarking the impact on a POWER9 4c/16t CPU the overall impact was fairly modest while since then I fired up some benchmarks as well on a large POWER9 server with 44 cores / 176 threads to see the performance impact of this default Linux kernel change.

Read more

More in Tux Machines

Getting Started with Raspberry Pi Pico using MicroPython and C

Raspberry Pi Pico board was just launched last Thursday, but thanks to Cytron I received a sample a few hours after the announcement, and I’ve now had time to play with the board using MicroPython and C programming language. I went to the official documentation to get started, but I had to look around to achieve what I wanted to do, namely blinking some LEDs, so I’ll document my experience with my own getting started guide for Raspberry Pi Pico using a computer running Ubuntu 20.04 operating system. The instructions will be similar for Windows and Mac OS. Read more

Tiny Core Linux Installation and Review

The OS architectures supported by Tiny Core Linux are x86. X86_64, and ARM processors. It may not be a complete package for a functional Linux distro or flavor, but the freedom and flexibility it offers is out of the box. Under Tiny Core Linux, you get to push your OS around rather than your OS pushing you around like in other platforms. The speed and simplicity under this Linux distro cannot be substituted. Moreover, the absence of a Desktop environment distractions under its user experience is another plus. It gifts you the perfect tinkering experience due to its lightweight nature. Read more

PinePhone news roundup (1-24-2021)

It’s been a busy week for PinePhone hardware and software developers. If you’ve been following LinuxSmartphone on Twitter you may have noticed that developers have made progress in making several different Linux distributions more usable, while other developers have been working to bring open source firmware to the PinePhone’s modem. The PinePhone KDE Community Edition has also begun shipping recently, the Mobian Community Edition model is up for pre-order. And the official keyboard add-on is coming along nicely, as is the semi-official fingerprint reader accessory. Read more

Xfce’s Thunar File Manager Gets Split View, File Creation Times, and More

Thunar 4.17 is here as the first milestone towards the next major release that will be part of the upcoming Xfce 4.18 desktop environment, which is now in early development. I know many of you love and use Thunar, so here’s a look at the major new features coming to your Xfce desktop environment. The big news is that Thunar now finally features a split view, allowing you to use the file manager as a dual-pane file explorer/commander. I bet many of you were hoping for this feature, so here it is and you’ll be able to use soon on your Xfce desktop, hopefully later this year. Read more