George Hotz is on a hacker crusade against the ‘scam’ of self-driving cars

Post by commaai » Sat, Jul 14, 2018, 5:51 AM UTC

HALtheWise wrote: post #69

asteli wrote: post #30

Here's the low-level controller for Comma AI's self-driving software. Lateral and longitudinal control, as well as actuator command are contained within. Their low level control is done in Python, on top of Android, on a smartphone. No further comment, your honor. https://github.com/commaai/openpilot/tree/devel/selfdrive/co...

Ummm... If you look in the actual lib/ directory where the work happens, you will see a bunch of high-performance C written in and generated by Acado, which is a very efficient optimization framework. It does look like there is a bunch of python logic for managing that controller, but a significant amount of work seems to have gone into performance optimization. I am curious how they prevent the Android GC from causi…

Post by srcmap » Sat, Jul 14, 2018, 6:31 AM UTC

stevenwoo wrote: post #67

asteli wrote: post #30

Here's the low-level controller for Comma AI's self-driving software. Lateral and longitudinal control, as well as actuator command are contained within. Their low level control is done in Python, on top of Android, on a smartphone. No further comment, your honor. https://github.com/commaai/openpilot/tree/devel/selfdrive/co...

In the 1980's the backup flight control software for landing the space shuttle ran on a HP-41 calculator, though they never had to use it AFAIK, with the multiple redundant onboard computers.

Post by aresant » Sat, Jul 14, 2018, 6:45 AM UTC

flippmoke wrote: post #26

If you are interested in learning more about George, you should listen to him talking at Mapbox's Locate conference with the Mapbox CEO, Eric Gundersen [1]. Its another example of George being George. I just happened to be called out during the talk, but overall rather enjoyed it. [1] https://www.youtube.com/watch?v=N9WxlR1ZTZc

Post by mynewtb » Sat, Jul 14, 2018, 7:14 AM UTC

commaai wrote: post #31

jaredklewis wrote: post #24

Earlier quoted context omitted.

Not disputing your claim, but how did you determine the comma Ai system was on par with that of autopilot and super cruise? In general, are there any standardized tests for self driving cars, like car safety ratings but for the driving part? Basically, is there even a way to measure how good a driving system is?

Not really. It's mostly subjective, but a good metric is time between user action needed. We did 2 hours of press demos on highways without a single one. (usually it's about an hour) In addition to us, we have a community of users on slack with thousands of miles of experience with each system. I think most would generally agree with the quality assessment. You'll also find a bunch of YouTube videos comparing them.

Post by scintill76 » Sat, Jul 14, 2018, 7:27 AM UTC

commaai wrote: post #71

HALtheWise wrote: post #69

Earlier quoted context omitted.

Ummm... If you look in the actual lib/ directory where the work happens, you will see a bunch of high-performance C written in and generated by Acado, which is a very efficient optimization framework. It does look like there is a bunch of python logic for managing that controller, but a significant amount of work seems to have gone into performance optimization. I am curious how they prevent the Android GC from causi…

There's no Android GC, there's a Java GC. Python on Android isn't written in Java, it's CPython, written in C. Python has a GC as well, but we turn it off for the control loop processes. https://github.com/commaai/openpilot/blob/devel/selfdrive/co... Haters love to bring up the Python, but they never stick around long enough to explain exactly why it's a problem.