[HN Gopher] 64 bit OS Raspberry Pi4 Benchmarks
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       64 bit OS Raspberry Pi4 Benchmarks
        
       Author : tosh
       Score  : 49 points
       Date   : 2020-02-29 19:10 UTC (3 hours ago)
        
 (HTM) web link (medium.com)
 (TXT) w3m dump (medium.com)
        
       | moonbug wrote:
       | I think the main issue keeping the pi with a 32b userspace is the
       | lack of availability of 64bit GPU firmware
        
       | 0xcoffee wrote:
       | Apparently in `config.txt` you can set `arm_64bit=1`
       | 
       | Then `sudo rpi-update`
        
         | echlebek wrote:
         | This results in a 64-bit kernel, but 32-bit userland, whereas
         | the arm64 Debian is entirely 64-bit.
        
           | MuffinFlavored wrote:
           | Do you need the `arm_64bit=1` flag to get 64-bit kernel,
           | 64-bit userland or no? I would have thought 64-bit everything
           | would have been the default.
        
             | monocasa wrote:
             | config.txt only affects the kernel and doesn't affect which
             | userland is selected.
        
             | Zaskoda wrote:
             | I just gave it a try and now apt is installing a bunch of
             | new kernel .img files. So for me, yes, this seemed to be
             | required before 64bit kernels were installed. I'm feeling
             | surprised. I'm 40% of the way through the install and
             | hoping it reboots okay in the end.
             | 
             | Edit: to be more clear, I also run 'apt update' afterwards
        
               | Zaskoda wrote:
               | Update: oh yeah, that broke a lot of stuff
        
       | threatofrain wrote:
       | There's also 64-bit Ubuntu Server and Core.
       | 
       | - https://www.raspberrypi.org/downloads/
        
       | louwrentius wrote:
       | So running the Pi in 64-bit is really overall beneficial. I'm
       | running a customised version of Ubuntu for the Pi4.
       | 
       | https://ubuntu.com/download/raspberry-pi
       | 
       | I've also customised the image by adding users, public keys and
       | such. Removing some of the cloud cruft.
       | 
       | These instructions make it very, very easy and you can do this on
       | an x86 machine. Just make sure to use /usr/bin/qemu-
       | aarch64-static (64 bits) instead of qemu-arm-static (32 bits).
       | 
       | https://powersj.io/post/raspbian-edit-image/
        
         | monocasa wrote:
         | Depends on the Pi. The A53 based Pis did a little worse in 64
         | bit mode on average IIRC (probs because of the cache pressure).
        
       | muth02446 wrote:
       | what would be ideal for raspi 3 and up are aarch64 binaries with
       | a 32 bit memory model (aarch64-ilp32). Dies debian support/use
       | this?
        
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       (page generated 2020-02-29 23:00 UTC)