[ros-users] [Discourse.ros.org] [Embedded] Installing Ubuntu 18.04 arm64v8 on Raspberry Pi 3
Hunter L. Allen
ros.discourse at gmail.com
Tue Nov 13 13:11:50 UTC 2018
I built a ROS 1 image for Turtlebot 3 on Gentoo that was 64 bit a while back, I'll link here once I dig up the post.
I think @ruffsl was attempting to make an Ubuntu image, though, and was hoping for 64 bit.
I'll say, however, that 64 bit arm is not necessarily a great thing on the raspberry pi... The main benefits: you get 16 more registers than 32 bit mode and you get better compiler optimizations (the pi 3 has vectorization, **if you turn it on**), but you _only_ have the < 1 GB of RAM which makes doing most things in a 64 bit system quite difficult... I think this is one of the reasons the raspberry pi people don't use 64 bit mode by default.
Don't get me wrong: I use my raspberry pi 3 in 64 bit mode, have compiled ROS on Gentoo, and have been able to do a full GMapping demo with Turtlebot3. It's not useless, and it's not painfully slow. But doing any memory-intensive thing is awful.
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