Running Overclocked Raspberry Pi 2 B With FreeBSD

Overclocking options: arm=1000MHz, core=500MHz, sdram=500MHz, overvolt=2

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Write an FreeBSD.img file to an SD card

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# plugin your sd card
# open a terminal as root/sudo
diskutil list // identify the /dev/diskNUMBER of the sd card
diskutil unmountDisk /dev/diskNUMBER
sudo dd bs=1m if=FreeBSD-11.0-CURRENT-arm-armv6-RPI-B-20150217-r278908.img of=/dev/diskNUMBER

How to build your own freebsd raspberry pi (arm6) image:

Update 2018-08

FreeBSD has supported the Raspberry Pi 2 since Q2 2015.

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FreeBSD update/rollback plus cron job

Update

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freebsd-update fetch
freebsd-update install

Rollback

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freebsd-update rollback

Daily update cron job

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echo '@daily    root    freebsd-update cron' >> /etc/crontab

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FreeBSD reboot 10 seconds after a panic

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echo 'kernel.panic = 10' >> /etc/sysctl.conf

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// kern.coredump=0
// kern.corefile=/dev/null
// background_fsck="NO" # on zfs ;)

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Setup swapfile on FreeBSD

Your process consume more memory than there is physical RAM (e.g compelling on a raspberry pi)? In that case you need swap space.

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dd if=/dev/zero of=/swapfile bs=1m count=512
chmod 0600 /swapfile
echo 'md99            none            swap sw,file=/swapfile  0 0' >> /etc/fstab
reboot
swapon -aLq
swapinfo
swapctl -lh

Based on:

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Setup ntp/d

Cause

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portsnap fetch update

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Snapshot appears to have been created more than one day into the future!
(Is the system clock correct?)
...

Solution

Global ntp pool/zone overview.

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ntpdate pool.ntp.org
echo 'ntpd_enable="YES"' >> /etc/rc.conf
echo 'ntpdate_enable="YES"' >> /etc/rc.conf
echo 'ntpd_sync_on_start="YES"' >> /etc/rc.conf

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FreeBSD Performance Analysis Tools

Source: https://github.com/hukl/freebsd-toolbox

e.g. $ systat -vmstat 0.5

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Fix FreeBSD 10.1 Boot Problem On Raspberry Pi B+ (error 19)

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echo 'hw.bcm2835.sdhci.hs="0"' >> /boot/loader.conf