Saturday, February 01
Daily News Stuff 31 January 2020
Humidity Wave Doesn't Have The Same Ring Edition
Humidity Wave Doesn't Have The Same Ring Edition
Tech News
- A possibly not entirely terrible small office switch from EnGenius, whoever they are (AnandTech)
Eight 2.5Gb ports, four 10Gb SFP+ ports, and, oh look, it uploads monitoring data to the cloud. What a great idea.
Netgear has a reasonably priced small multi-gigabit switch, but the port configuration is a mess: Four 1Gb, two 2.5Gb, two 5Gb, one 10Gb RJ-45, and one 10Gb SFP+.
- Matrox still exists. (Tom's Hardware)
They just make low-end cards for driving video walls, but if you need an aggregate resolution of 20,480 x 12,800 from a single PC, they've got you covered.
Covered with a rat's nest of adaptor cables, but covered.
- Another day, another ContentID debacle from YouTube. (TechDirt)
In this case a particularly impressive showing: YouTube took down a livestream that hadn't even started.
- Amazon pressed Ukrainian business magazine Vector to alter an article that linked the behaviour of Ring to Amazon. (TechDirt)
Amazon owns Ring.
At least it's standard corporate evil empire behaviour where nothing matters but money, and not the international socialist takeover kind where nothing matters but uniformity. You can always pay the former to leave you alone.
- Let's remove quaternions from every 3D graphics API and replace it with the same thing with a different name.
Or, on the other hand, not.
- Some Epyc Rome chips don't have four memory channels instead of eight. (Serve the Home)
This is just a little bit confusing. These parts - the 7232P, 7252, 7272, and 7282 are "four channel optimised", but all eight channels work. You can still have sixteen DIMMs per CPU.
The only difference is that because they only have two CPU dies - 8, 12, or 16 total cores - they only connect directly to two quadrants of the huge I/O die in the middle. Memory accesses can still hop right across to any other quadrant but it does take several extra nanoseconds.
So "four channel optimised" means "eight channel but you will get a few percent better performance on some workloads if you only populate four of the channels, maybe".
- Online meal delivery apps have a strange new trick:Add restaurants without asking them first. (Eater)
Including restaurants that don't offer take-out. Unsurprisingly, lawyers are now involved.
Disclaimer: It ain't what you do, it's the way that you do it. And that's what gets results.
Posted by: Pixy Misa at
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"So "four channel optimised" means "eight channel but you will get a few
percent better performance on some workloads if you only populate four
of the channels, maybe"."
Sounds similar to Threadripper first-gen, although not quite the same due to the IOD, which wasn't in Threadripper first-gen.
Sounds similar to Threadripper first-gen, although not quite the same due to the IOD, which wasn't in Threadripper first-gen.
Posted by: Rick C at Saturday, February 01 2020 01:44 AM (Iwkd4)
2
Yeah, it's basically an inversion of the 2990WX with the same effects on latency. The 2990WX had four CPU chiplets with memory only locally attached to two because it didn't have enough memory channels. These have two CPU chiplets and only have the memory is locally attached because they have too many memory channels.
A Linux kernel patch will probably show up that mitigates it. The 2990WX ran much better under Linux than under Windows as it was.
A Linux kernel patch will probably show up that mitigates it. The 2990WX ran much better under Linux than under Windows as it was.
Posted by: Pixy Misa at Saturday, February 01 2020 11:14 AM (PiXy!)
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