Readit News logoReadit News
thetallstick commented on A 2030 Self-Driving Car Bet   blog.codinghorror.com/the... · Posted by u/mudro_zboris
colinmhayes · 4 years ago
He said top 10 most populous.
thetallstick · 4 years ago
Looks like we both misread it.

"By "major cities" we mean any of the top 10 most populous cities in the United States of America."

Phoenix is in that list.

thetallstick commented on A 2030 Self-Driving Car Bet   blog.codinghorror.com/the... · Posted by u/mudro_zboris
Strilanc · 4 years ago
The terms of the bet require the car to navigate through New York in the winter. Definitely a lot of challenges there that aren't present in Austin. I think 2030 is a nice contentious number to bet over. Far enough in the future that there could be key breakthroughs to make it work.
thetallstick · 4 years ago
My reading of the terms of the bet is major cities, which means more than one city with a population in excess of 250K. In my reading just Phoenix and Tucson would be sufficient.
thetallstick commented on A 2030 Self-Driving Car Bet   blog.codinghorror.com/the... · Posted by u/mudro_zboris
dsr_ · 4 years ago
The Society of Automotive Engineers set the levels and has good definitions.

It's true, most humans aren't always L5. That's not a bug.

thetallstick · 4 years ago
I see. It's also an ISO standard too, which means it won't happen for sure before 2030... :)

https://www.sae.org/standards/content/j3016_202104

thetallstick commented on A 2030 Self-Driving Car Bet   blog.codinghorror.com/the... · Posted by u/mudro_zboris
thetallstick · 4 years ago
Is there an agreed upon definition of level 5? I mean what's "everywhere" and "all conditions". I can't drive everywhere and in all conditions for some definitions of everywhere and all conditions. Am I not level 5? :)
thetallstick commented on A 2030 Self-Driving Car Bet   blog.codinghorror.com/the... · Posted by u/mudro_zboris
ilaksh · 4 years ago
Are Waymo and Cruise not commercial products?

I think they work in most conditions. How someone can look at Cruise and Waymo already in operation today and think they won't be generally available in 7 years is amazing to me.

thetallstick · 4 years ago
To be commercially available for passenger use in major cities at level 5, regulators have to also agree it's level 5. It's not just a technical problem.
thetallstick commented on RISC-V is succeeding   semiengineering.com/why-r... · Posted by u/PaulHoule
snvzz · 4 years ago
>does anyone end up making decent RISC-V processors that could replace a desktop CPU

As of November, a large number of extensions got ratified, including the vector extension, cryptography acceleration, hypervisor support and other important features.

RISC-V is finally not missing any important feature ARM or amd64 have, and it does it with an order of magnitude lower number of instructions (equivalent but simpler, i.e. better) and with significantly higher code density.

However, test chips with the first designs implementing all of that will take time, even assuming they were tapped out right then, after confirming no last minute changes.

High performance cores depend on these extensions, so we'll begin to see them soon. We know multiple such efforts exist.

Tenstorrent has one such project, led by Jim Keller.

>Their (ARM) business model was to be sold to NVIDIA, but that didn't work out.

They intend to go public now. I recommend against buying those shares, as I do not expect ARM to turn around.

thetallstick · 4 years ago
> with significantly higher code density.

This is not correct and is a known weakness of RISC-V at the moment. The ARM toolchains are really good and have decades of improvements in them. This is a big issue for those who need to buy ROM in volume.

Better tools are coming online though. For example:

https://blog.segger.com/code-size-closing-the-gap-between-ri...

"One of the issues faced by RISC-V developers is that the code density of the RISC-V instruction set for deeply embedded processors does not match that of Cortex-M with existing tools."

thetallstick commented on China asked Russia to delay war until after Olympics, Biden officials say   nytimes.com/2022/03/02/us... · Posted by u/neverminder
rectang · 4 years ago
You're probably right that the Times has "one of the best processes".

However, the Times also employed Judith Miller, which goes to show how little such processes are worth.

thetallstick · 4 years ago
For those who don't get the Judith Miller reference.

https://en.wikipedia.org/wiki/Iraq_and_weapons_of_mass_destr...

"In the buildup to the 2003 war, the New York Times published a number of stories claiming to prove that Iraq possessed WMD. One story in particular, written by Judith Miller, helped persuade the American public that Iraq had WMD: in September 2002 she wrote about an intercepted shipment of aluminum tubes which the NYT said were to be used to develop nuclear material."

thetallstick commented on RISC-V is succeeding   semiengineering.com/why-r... · Posted by u/PaulHoule
klelatti · 4 years ago
Writing code for Blender != Developing a high performance core that is going to be fabricated on TSMC's leading edge process.

In the first case anyone with the right skills can do it. In the second you need access to lots of specialist tools / proprietary industry knowledge.

If RISC-V 'wins' in application processors it will be because an Intel or a Qualcomm invests (probably) hundreds of millions in building a team that works on a multi year project. It definitely won't be bored high schoolers.

thetallstick · 4 years ago
Shockingly this is not strictly the case anymore and it's become less true everyday.

https://info.efabless.com/press-release-efabless-launches-ch...

thetallstick commented on RISC-V is succeeding   semiengineering.com/why-r... · Posted by u/PaulHoule
hajile · 4 years ago
We've moved past this for the most part. Anything running on an ARM will be almost entirely written in C. At that point, porting to RISC-V becomes much cheaper. As long as the savings from RISC-V exceed the cost of porting the firmware, this is what companies would do.
thetallstick · 4 years ago
The code may have been written in C but many drivers are distributed in binary only form with headers. Unfortunately the binaries are often ARM only.

u/thetallstick

KarmaCake day76January 28, 2022View Original