tecteun/fix_throttling_when_idle.md

Last active December 28, 2020 11:06

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Ubuntu studio / realtime audio processing (Intel(R) Core(TM) i7 CPU 870)

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fix_throttling_when_idle.md

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throttling does not go well with realtime audio processing (resulting in a popcorn audio stream)

Having audio issues? Double check if u r throttling!!

see real live cpu frequency

watch grep \"cpu MHz\" /proc/cpuinfo

disable cpuidle

add

idle=poll

to /etc/default/grub -> GRUB_CMDLINE_LINUX_DEFAULT

cpu freq selector

apt install indicator-cpufreq

/etc/modprobe.d/alsa-base.conf

options snd-ice1712 model=delta44 omni=0

/etc/default/rtirq

RTIRQ_NAME_LIST="snd_ice1712 snd_hda usb"

modinfo

modinfo snd-ice1712

pulseaudio

/etc/pulse/default.pa

  load-module module-udev-detect tsched=0 ignore_dB=0

/etc/pulse/daemon.conf

  resample-method = ffmpeg
  enable-remixing = yes
  default-sample-format = s32le
  default-sample-rate = 44100
  alternate-sample-rate = 48000

Author

tecteun commented Dec 27, 2020

if you intend to install a different kernel, update-grub does not find them, because /etc/grub.d/10_linux is set to -x by /etc/grub.d/09_lowlatency which is installed by ubuntustudio-lowlatency-settings package

fix this by
sudo chmod -x /etc/grub.d/09_lowlatency

Author

tecteun commented Dec 28, 2020

Disable irqbalance:
sudo apt remove irqbalance