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OpenBSD: Impact of disabled SMT

Posted 07-07-2018 at 01:22 PM by GazL (GazL's Gazette)
Updated 07-07-2018 at 01:24 PM by GazL

A couple of weeks ago, OpenBSD announced that they would be disabling Simultaneous Multi Threading (SMT) a.k.a HyperThreading on Intel CPUs over security fears related to side-channel attacks on the cache (much like those of recent Specter fame). Well, I've just updated my OpenBSD 6.3 partition to a -current snapshot that includes the new protection(s) and the results are blog-worthy, so here we go...

Firstly, my machine has an i3-5157u, 2 cores x 2 threads, so 4 hyperthreads (logical...
Senior Member
Posted in Technical
Views 455 Comments 5 GazL is offline

RaspAnd Oreo 8.1 for Raspberry Pi 3 Model B (not B+) Build 180707 with Google Play Store, Aptoide TV and TeamViewer

Posted 07-07-2018 at 11:25 AM by exton (Exton's Blog)
Updated 07-08-2018 at 10:49 AM by exton (Fixing errors)

NEWS 180707: My build of RaspAnd Oreo 8.1 is ready. It’s the first RaspAnd build with Android Oreo 8.1. All installed apps (including Google Play Services and Google Play Store) have been updated to the latest available version by 180707. Read about all other included apps below. While downloading RaspAnd Oreo 8.1 Build 180707 you will also get RaspAnd Nougat 7.1.2 Build 180529, which works much better than RaspAnd Oreo 8.1.

RaspAnd Oreo 8.1 Build 180707 can be used with the official...
ExTiX Admin
Views 48 Comments 1 exton is offline

The decline and fall of the Linux forum - Episode V : You can't "educate" people, so just give up...

Posted 07-02-2018 at 10:56 AM by cynwulf
Updated 07-03-2018 at 08:57 AM by cynwulf

The decline and fall of the Linux forum - Episode V : You can't "educate" people, so just give up...


This was broken off from Episode IV and spun off into it's own episode. Episode IV had accumulated lots of addendum sections and become far to sprawling as a result, plus Episode IV had a "theme" and the below content wasn't it. The first piece was written some time late last year and the last parts earlier this year, I have only tidied...
Senior Member
Posted in Uncategorized
Views 278 Comments 1 cynwulf is offline

Architecture of a switch

Posted 07-02-2018 at 10:25 AM by rocket357 (Musings on technology, philosophy, and life in the corporate world)

I was setting up smokeping in a docker container on a recently-repurposed machine on my home network, as I recently downsized from a Cisco 3560 core switch to two Ubiquiti US-8s (primary reasoning: the US-8 handles vlans like a champ, and I can run them both on my battery bank with a lighter wattage impact than the 3560). Smokeping was reporting some odd numbers which illustrates a quirk about switches/routers designed for management purposes, so I thought I'd write here about the effect and what...
Posted in Uncategorized
Views 512 Comments 0 rocket357 is offline

This...this should *never* happen

Posted 06-30-2018 at 12:11 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)
Updated 06-30-2018 at 12:22 PM by rocket357

user@host:~$ sudo reboot
[sudo] password for user:
Failed to start Connection timed out
See system logs and 'systemctl status' for details.

Words cannot express how infuriating and depressing that error message is. Just turn the &$(&%^Y(#@ computer off!

Edit: It gets ever more obnoxious:

root@host:~# systemctl status
Failed to get properties: Connection timed out
Posted in Uncategorized
Views 84 Comments 7 rocket357 is offline


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