Notices
Car Chat General discussion about Lexus, other auto manufacturers and automotive news.
Sponsored by:
Sponsored by: Innova

The "brains" behind Tesla's self-driving tech

Thread Tools
 
Search this Thread
 
Old Aug 22, 2019 | 06:04 AM
  #1  
jrmckinley's Avatar
jrmckinley
Thread Starter
Pole Position
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2014
Posts: 3,354
Likes: 555
From: fl
Default The "brains" behind Tesla's self-driving tech

Pretty interesting article about Tesla's in-house chip technology. Tesla's in-house chip is 21 times faster than the older Nvidia model Tesla used. And each car's computer has two for safety.

https://www.cnet.com/news/meet-tesla...two-ai-brains/
Reply
Old Aug 22, 2019 | 09:01 AM
  #2  
bitkahuna's Avatar
bitkahuna
CL Community Team
iTrader: (20)
 
Joined: Feb 2001
Posts: 80,811
Likes: 3,998
Default

lots of big numbers thrown around in that article, but doesn't mean much. "21x faster" - how measured?

Each Tesla AI chip runs at 2GHz and performs 36 trillion operations per second.
36 trillion? that does not seem accurate.

For another, it's got an extremely limited set of instructions it can process.
that's the old 'RISC' idea (reduced instruction set computer) and while it makes the processor design simpler, it also means a LOT of execution of those instructions are used to do complex things sometimes negating the benefit of being able to do so many 'operations'. but cell phones and tablets use risc, and obviously it works great.

And it's got a gargantuan 32 megabytes of high-speed SRAM memory on the chip, which means it doesn't have to wait around while fetching data from much slower conventional DRAM memory.
32MB of cache is nice, but since cars stick around for a decade or more, you have to be somewhat ahead of the curve, especially if you're trying to do ambitious things like autonomy.

it IS true though that tesla now has a VAST amount of experience and DATA from their cars, which is improving every moment. this means they're YEARS ahead of other car makers who have 'dumb' not-connected vehicles, and thus almost no data.

i think other car makers are very scared of tesla, and rightfully so.
Reply
Old Aug 22, 2019 | 09:21 AM
  #3  
EZZ's Avatar
EZZ
Lexus Test Driver
 
Joined: Jan 2007
Posts: 7,460
Likes: 232
From: CA
Default

Originally Posted by bitkahuna
lots of big numbers thrown around in that article, but doesn't mean much. "21x faster" - how measured?



36 trillion? that does not seem accurate.



that's the old 'RISC' idea (reduced instruction set computer) and while it makes the processor design simpler, it also means a LOT of execution of those instructions are used to do complex things sometimes negating the benefit of being able to do so many 'operations'. but cell phones and tablets use risc, and obviously it works great.



32MB of cache is nice, but since cars stick around for a decade or more, you have to be somewhat ahead of the curve, especially if you're trying to do ambitious things like autonomy.

it IS true though that tesla now has a VAST amount of experience and DATA from their cars, which is improving every moment. this means they're YEARS ahead of other car makers who have 'dumb' not-connected vehicles, and thus almost no data.

i think other car makers are very scared of tesla, and rightfully so.
I think Waymo currently is way ahead of everyone in the self driving department. Google's solution relies on Lidar so it looks goofy on the cars but it seems to work better than visual cues only that Tesla uses. I'm a Tesla fan but even i'm doubtful that any sort of self driving comes before 2025. By that point, who knows what happens...AI might evolve to the point that Skynet becomes self aware and we'd all be servants to the robot overlords...
Reply
Old Aug 22, 2019 | 09:58 AM
  #4  
Lend0's Avatar
Lend0
Intermediate
 
Joined: May 2019
Posts: 346
Likes: 65
From: Las Vegas
Default

So sophisticated yet they're building cars outside in a tent. What a joke of a company.
Reply
Old Aug 22, 2019 | 10:04 AM
  #5  
riredale's Avatar
riredale
Instructor
 
Joined: Oct 2016
Posts: 857
Likes: 47
From: Oregon
Default

Big Whoop.

While I admire what SpaceX has accomplished, Musk seems to be a bit of a nutjob when it comes to promises not kept. And I wonder if the new Porsche will just clobber the Model S. It's getting a lot of positive press and supposedly 300K pre-purchase deposits to date.
Reply
Old Aug 22, 2019 | 10:15 AM
  #6  
EZZ's Avatar
EZZ
Lexus Test Driver
 
Joined: Jan 2007
Posts: 7,460
Likes: 232
From: CA
Default

Originally Posted by riredale
Big Whoop.

While I admire what SpaceX has accomplished, Musk seems to be a bit of a nutjob when it comes to promises not kept. And I wonder if the new Porsche will just clobber the Model S. It's getting a lot of positive press and supposedly 300K pre-purchase deposits to date.
What do you mean clobber? Sales, performance, build quality? They are pretty different cars...one is a midsize sports sedan while the other is a full size 7 series fighter. The Model S will clobber it in straightline in Ludicrous while the Porsche will probably clobber it in handling and sustainable output. The Model S will get 350 miles of range while the Porsche will be around 225 miles. I bet the Porsche will have better build quality and interior though.
Reply
Old Aug 22, 2019 | 10:17 AM
  #7  
Hoovey689's Avatar
Hoovey689
2UR-GSE Owner
15 Year Member
iTrader: (16)
 
Joined: Oct 2008
Posts: 42,476
Likes: 321
From: California
Default

Originally Posted by riredale
Big Whoop.

While I admire what SpaceX has accomplished, Musk seems to be a bit of a nutjob when it comes to promises not kept. And I wonder if the new Porsche will just clobber the Model S. It's getting a lot of positive press and supposedly 300K pre-purchase deposits to date.
Think you added an extra 0 lol

https://thedriven.io/2019/07/31/pors...ted-for-debut/
Reply
Old Aug 22, 2019 | 11:20 AM
  #8  
jrmckinley's Avatar
jrmckinley
Thread Starter
Pole Position
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2014
Posts: 3,354
Likes: 555
From: fl
Default

Originally Posted by Lend0
What a joke of a company.
Right. All they did was create the EV category, make non ICE cars attractive for the first time, enter into one of the most competitive industries in the world, build the fastest production car ever (beating Bugatti at 15x the price), create some of the safest vehicles on the planet, create a super charger network, challenge every other auto manufacturer to step up their game, and (through one of Musk's other "joke" companies) launch a Tesla into orbit. Total joke!

You'll own an EV at some point, maybe not a Tesla, but you should thank Tesla for the one you end up with. They're forcing the entire market to move and bring better product to the consumer. SMH.
Reply
Old Aug 22, 2019 | 11:20 AM
  #9  
bitkahuna's Avatar
bitkahuna
CL Community Team
iTrader: (20)
 
Joined: Feb 2001
Posts: 80,811
Likes: 3,998
Default

Originally Posted by riredale
and supposedly 300K pre-purchase (Taycan) deposits to date.


Originally Posted by Hoovey2411
Think you added an extra 0 lol


Originally Posted by EZZ
They are pretty different cars...one is a midsize sports sedan while the other is a full size 7 series fighter.
uh, 7 series is almost a foot longer than a tesla s. 7 series WAAAAAAAAY more luxurious. they're not in the same universe.

The Model S will clobber it in straightline in Ludicrous while the Porsche will probably clobber it in handling and sustainable output. The Model S will get 350 miles of range while the Porsche will be around 225 miles. I bet the Porsche will have better build quality and interior though.
nice predictions, and you're probably right. as for 'clobbering' it in straight line, how often does one get the chance to do 0-60 in 3 seconds or less? also, that's so fast it's kinda boring because most people doing that are then immediately hitting the brakes to stop at the sign or light, or just coasting so they're not doing 100mph a couple of seconds later. it's all rather silly, but good for bragging rights. at least the feature is named correctly - 'ludicrous'

and there's this.
https://www.businessinsider.com/tesl...erience-2016-8
Reply
Old Aug 22, 2019 | 11:24 AM
  #10  
jrmckinley's Avatar
jrmckinley
Thread Starter
Pole Position
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2014
Posts: 3,354
Likes: 555
From: fl
Default

Originally Posted by riredale
Big Whoop.
Well, Tesla took control of chip design in effort to deliver full autonomy soon. If they do that, thanks in part to these chips, it is a huge deal.
Reply
Old Aug 22, 2019 | 11:39 AM
  #11  
LeX2K's Avatar
LeX2K
Lexus Fanatic
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2010
Posts: 26,004
Likes: 4,313
From: Alberta
Default

Originally Posted by bitkahuna
I hope you're posting this ironically.
It feels like you're being launched into orbit, basically. But that's an issue when you get right down to it. Because Ludicrous Mode isn't that great in practice, or at least in everyday practice. It's best enjoyed in moderation.

Going fast in a Ferrari never gets old because ... it's a Ferrari! But Ludicrous Mode in a Tesla is fun the first few times, and then you just don't want to go through he battening-down process that's required to get ready to fulfill your need for speed.
Someone (I assume) actually got paid to write that.
Reply
Old Aug 22, 2019 | 03:07 PM
  #12  
spwolf's Avatar
spwolf
Lexus Fanatic
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2005
Posts: 20,238
Likes: 274
Default

Originally Posted by bitkahuna
lots of big numbers thrown around in that article, but doesn't mean much. "21x faster" - how measured?
Who knows... i remember all the promises around autonomous mode, it was supposed to be running fully last year right? And didnt they promise that they wont have to upgrade computers on cars produced from 11/2016, and they did it 2x already?
Reply
Old Aug 22, 2019 | 09:13 PM
  #13  
bitkahuna's Avatar
bitkahuna
CL Community Team
iTrader: (20)
 
Joined: Feb 2001
Posts: 80,811
Likes: 3,998
Default

Originally Posted by Lexus2000
I hope you're posting this ironically.
not at all. for many, and i mean MANY, the thrill of driving a FERRARI will never be outdone by an electric 4 door sedan, now matter how fast the electric car is.

and for many, they've got much higher priorities than going 0-60 in a 'ludicrous'ly short amount of time.
Reply
Old Aug 22, 2019 | 09:26 PM
  #14  
LeX2K's Avatar
LeX2K
Lexus Fanatic
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2010
Posts: 26,004
Likes: 4,313
From: Alberta
Default

Originally Posted by bitkahuna
not at all. for many, and i mean MANY, the thrill of driving a FERRARI will never be outdone by an electric 4 door sedan, now matter how fast the electric car is.
Shouldn't you be comparing a Ferrari to the upcoming Tesla Roadster and not a sedan?
and for many, they've got much higher priorities than going 0-60 in a 'ludicrous'ly short amount of time.
Count me in to this way of thinking but I'd say a great many people disagree, or at the least put a massive emphasis on acceleration. As for electrics not being fun watch the Tesla racing channel on YT that guy always has a smile on his face blowing the door off of just about everything.
Reply
Old Aug 22, 2019 | 09:54 PM
  #15  
bitkahuna's Avatar
bitkahuna
CL Community Team
iTrader: (20)
 
Joined: Feb 2001
Posts: 80,811
Likes: 3,998
Default

Originally Posted by Lexus2000
Shouldn't you be comparing a Ferrari to the upcoming Tesla Roadster and not a sedan?
you questioned me about the article and i responded. maybe you should ask the article author.

and hard to compare a ferrari (something i hardly ever see and have only been in one once) to a car that’s not even out.

Count me in to this way of thinking but I'd say a great many people disagree, or at the least put a massive emphasis on acceleration. As for electrics not being fun watch the Tesla racing channel on YT that guy always has a smile on his face blowing the door off of just about everything.
boys and their toys...
Reply



All times are GMT -7. The time now is 03:28 AM.