Personal computing discussed

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by notfred
Mon Sep 17, 2018 1:09 pm
Forum: Linux, Unix, and Assorted Madness
Topic: Linus Torvalds to stop flaming people
Replies: 16
Views: 804

Linus Torvalds to stop flaming people

https://news.slashdot.org/story/18/09/1 ... e-time-off

I guess we just need to get Theo de Raadt to stop flaming now :)
by notfred
Thu Sep 13, 2018 8:20 am
Forum: Networking
Topic: Receive Side Scaling - latency hazard?
Replies: 19
Views: 11612

Re: Receive Side Scaling - latency hazard?

Trying to plot latency along the path is pretty meaningless. The routers on the Internet forward traffic in hardware, anything that requires a reply gets punted to CPU and is no longer representative of what is going on for forwarded traffic. Endpoint latency is really the one thing that matters. As...
by notfred
Sun Sep 09, 2018 10:55 am
Forum: Linux, Unix, and Assorted Madness
Topic: Linux+Threadripper plunge
Replies: 18
Views: 1195

Re: Linux+Threadripper plunge

Finally, you can channel X over ssh--with some added configuration--meaning that you can display X apps running on the server on the mac (not in the console, but in their own windows with Xquartz). Unfortunately, X applications are usually a bit ugly in the OS X environment or maybe I never cared e...
by notfred
Wed Sep 05, 2018 8:28 am
Forum: The Back Porch
Topic: The promise and failure of home automation...
Replies: 18
Views: 1100

Re: The promise and failure of home automation...

What I want to do on the audio side is, well, unique. I've been playing around with a Biamp Tesira ServerIO with an AVB connection and a Mac that outputs directly to it. The unique thing is that I can actually pass high channel count audio like an ripped Atmos Blu-ray and get 16 discrete audio chan...
by notfred
Mon Aug 27, 2018 8:33 am
Forum: TR Sports
Topic: Formula One 2018
Replies: 132
Views: 14002

Re: Formula One 2018

Alonso's going to need flying lessons.

I'd like to see how many people are still against the halo.
by notfred
Mon Aug 27, 2018 8:32 am
Forum: Networking
Topic: CPU architecture router performance
Replies: 12
Views: 1103

Re: CPU architecture router performance

Others have covered it with the practical side of home routers. For those interested in the theoretical aspects, once packets are no longer forwarded by the ASIC and get punted to the CPU, x86 is cache coherent where the usual ARM DMA engines are cache incoherent. There are some ARM DMA engines that...
by notfred
Fri Aug 24, 2018 3:59 pm
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3507
Views: 140422

Re: DYMT: Imi's Legacy

And at least a few of those tabs are pages at stack overflow. :P Yup! (And sometimes it's more than just a few... it is not uncommon for stack overflow to be more useful than the official documentation.) FWIW we also need to be careful not to directly copy-paste any code from stack overflow into ou...
by notfred
Tue Aug 21, 2018 7:53 am
Forum: The Back Porch
Topic: Anyone repair anything today?
Replies: 1158
Views: 99140

Re: Anyone repair anything today?

Ah, that's not the way the old one was but I think I have some extra nuts and washers and could set that up on the new one. Thanks!
by notfred
Tue Aug 21, 2018 7:42 am
Forum: TR Sports
Topic: Formula One 2018
Replies: 132
Views: 14002

Re: Formula One 2018

23 year old youngster Gasly joins the more experienced 20 year old Verstappen at Red Bull. :)
by notfred
Mon Aug 20, 2018 9:42 am
Forum: The Back Porch
Topic: Anyone repair anything today?
Replies: 1158
Views: 99140

Re: Anyone repair anything today?

This was toilet weekend. Friday night as I'm going to bed I go to flush the toilet in the ensuite and it doesn't. The chain had pulled off the flapper as the flapper was disintegrating - fine I'll deal with that in the morning. Saturday morning I go get a new flapper and while I'm fitting it I notic...
by notfred
Tue Aug 14, 2018 11:40 am
Forum: TR Sports
Topic: Formula One 2018
Replies: 132
Views: 14002

Re: Formula One 2018

Alonso announces his retirement at the end of the season:
http://www.espn.co.uk/f1/story/_/id/243 ... end-season
by notfred
Tue Aug 14, 2018 8:04 am
Forum: Processors
Topic: Spectre-Meltdown barricade
Replies: 36
Views: 2337

Re: Spectre-Meltdown barricade

If you want to get really worried you can look up Net Spectre.
by notfred
Fri Aug 10, 2018 8:27 am
Forum: Linux, Unix, and Assorted Madness
Topic: Need Help - Do I need know Linux or Unix to become a professional Network Engineer
Replies: 3
Views: 437

Re: Need Help - Do I need know Linux or Unix to become a professional Network Engineer

If you are going for CCIE then your head is going to be too full of the Cisco ways to do things, you don't want to be trying to cram Linux in there at the same time. Having said that, TCP/IP networking was originally developed on BSD and most research these days happens on Linux. If you only know th...
by notfred
Thu Aug 09, 2018 12:46 pm
Forum: Linux, Unix, and Assorted Madness
Topic: systemd-resolve and local hostnames in Ubuntu 18.04
Replies: 4
Views: 549

Re: systemd-resolve and local hostnames in Ubuntu 18.04

Yup, I already had the NTP server in there, plus all the gear to PXE boot the Ubuntu installation for both BIOS and UEFI.
by notfred
Thu Aug 09, 2018 9:34 am
Forum: Linux, Unix, and Assorted Madness
Topic: systemd-resolve and local hostnames in Ubuntu 18.04
Replies: 4
Views: 549

Re: systemd-resolve and local hostnames in Ubuntu 18.04

I gave up on making systemd-resolve behave and changed my dnsmasq setup. Now everything on my LAN has names in the .lan domain and that domain is pushed as a search domain to all the DHCP clients.
by notfred
Mon Aug 06, 2018 11:52 am
Forum: Linux, Unix, and Assorted Madness
Topic: systemd-resolve and local hostnames in Ubuntu 18.04
Replies: 4
Views: 549

systemd-resolve and local hostnames in Ubuntu 18.04

I have dnsmasq on a server on my network serving a bunch of local names "printer", "ata" etc. Many of these devices do not have LLMNR capabilities. I just switched from Ubuntu 16.04 to 18.04 and systemd-resolve now refuses to send these names without a domain to the DNS server: n...
by notfred
Sat Aug 04, 2018 8:02 pm
Forum: TR Sports
Topic: Formula One 2018
Replies: 132
Views: 14002

Re: Formula One 2018

In other news, Niki Lauda is reported to be doing well in his recovery from a double lung transplant.
by notfred
Thu Jul 26, 2018 12:22 pm
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3507
Views: 140422

Re: DYMT: Imi's Legacy

IIRC, it's how you parse information in the old Unix environment. It's been a long, long time since i've used that command though. Maybe back when I was in high school. You're thinking of "grep". Edit: Turns out there's a "grok" too, but it's not generally considered to be one o...
by notfred
Fri Jun 29, 2018 7:58 am
Forum: TR Sports
Topic: Formula One 2018
Replies: 132
Views: 14002

Re: Formula One 2018

by notfred
Thu Jun 28, 2018 8:06 am
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3507
Views: 140422

Re: DYMT: Imi's Legacy

https://www.youtube.com/watch?v=vqW0LEcTAYg Epic fail! One wonders why the range safety officer failed to abort/detonate the rocket before things got that far out of control. From some of the stuff I've read about what happened, the abort mechanism is disabled for some number of seconds after ignit...
by notfred
Tue Jun 26, 2018 12:02 pm
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3507
Views: 140422

Re: DYMT: Imi's Legacy

Thanks, that pointed me in the direction of the video I remembered https://www.youtube.com/watch?v=OngbHZ2fsbA
by notfred
Tue Jun 26, 2018 11:34 am
Forum: Processors
Topic: Intel Speculative Execution - yet another flaw
Replies: 7
Views: 1104

Re: Intel Speculative Execution - yet another flaw

Agreed. I'd just like them to stop discovering new ways in which the processors are vulnerable and make something that isn't.
by notfred
Tue Jun 26, 2018 10:26 am
Forum: Processors
Topic: Intel Speculative Execution - yet another flaw
Replies: 7
Views: 1104

Re: Intel Speculative Execution - yet another flaw

And now TLBleed which is hyperthreading rather than speculative execution.
by notfred
Tue Jun 26, 2018 9:10 am
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3507
Views: 140422

Re: DYMT: Imi's Legacy

I had read about this incident before, but hadn't seen this HD slo-mo footage: https://www.youtube.com/watch?v=vqW0LEcTAYg Epic fail! Hadn't seen the slo-mo one before. There is another video of people watching it, who then realise just how bad it is going and start running before the pressure wave...
by notfred
Mon Jun 25, 2018 9:02 am
Forum: TR Sports
Topic: Formula One 2018
Replies: 132
Views: 14002

Re: Formula One 2018

I loved Max's comments about how the journalists should go ask Seb if he was going to change his approach to races.
by notfred
Mon Jun 18, 2018 11:36 am
Forum: Networking
Topic: Need to replace AirPort Extreme setup.
Replies: 34
Views: 1682

Re: Need to replace AirPort Extreme setup.

Just going to add yet another vote for a UniFi, got an AP-AC-LR at home and it is rock solid.
by notfred
Fri Jun 15, 2018 8:30 am
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3507
Views: 140422

Re: DYMT: Imi's Legacy

About 20 years ago I was working on a project where we brought in a contract hardware engineer who was much older than me. We had been working together for a month or so before I realised that he had the same name as someone who used to work with my father. We compared notes and it was him, we had b...
by notfred
Thu Jun 14, 2018 12:01 pm
Forum: Processors
Topic: Intel Speculative Execution - yet another flaw
Replies: 7
Views: 1104

Intel Speculative Execution - yet another flaw

Lazy FP state restore leaks state, including potentially your crypto keys: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00145.html https://twitter.com/cperciva/status/1007010583244230656 So far Intel only, not AMD. Guess I need to wait a bit longer to build a new PC: htt...
by notfred
Sun Jun 10, 2018 5:42 pm
Forum: Networking
Topic: USB NIC
Replies: 6
Views: 403

Re: USB NIC

The big problem with USB NICs is that what it says on the box basically has no resemblance to what the the actual chip is in the adapter. You really need to plug the adapter in and read the USB VID and PID, and even then you may need to look up the mapping to what the chip actually is versus its bad...