RPI setup¶
config.txt¶
Below is a starting point for a /boot/config.txt matching a Raspberry Pi 3 B+. Most importantly is enabling turbo mode to prevent the cpu from changing its frequency dynamically. This will have a negative effect on Twitse time measurements.
Next the RPI’s are overclocked. They are not exactly speed kings and they can use a little boost. Common sense would dictate that overclocking must have a positive effect on the Twitse time measurements but this haven’t really been verified.
/boot/config.txt:
# See /boot/overlays/README for all available options
gpu_mem=16
dtparam=i2c1=on # client only
dtparam=i2c_arm=on # client only
dtparam=spi=on # client only
dtoverlay=hifiberry-dac # client only
force_turbo=1
arm_freq=1200
core_freq=500
sdram_freq=500
over_voltage=2
over_voltage_sdram=2
initramfs initramfs-linux.img followkernel
/boot/cmdline.txt
Disable the ‘audit’ kernel logs: audit=0
Watch for processes writing to disk: iotop -o -b -d 10
(This is from an Arch installation)