Hi, some things seems to be distro specific and other depend on the used CPU. On Mon, 2018-08-27 at 15:58 -0700, Len Ovens wrote: > Some things have changed with cpufreq. > - in days of old there was /etc/rc.d/*ondemand that ran 60 seconds after > startup. This means no matter what you set for cpufreq it gets > down graded 60 sec later. disable ondemand if your os comes with > it. > - Now days there is kernel modules that need to be loaded and effective > before changing cpufreq stuff, otherwise it doesn't work... and > ondemand has been moved to systemd to ensure this. So it is best > if your os uses systemd to move you cpufreq setting script to > systemd to replace ondemand. BTW this ondemand also waits 60 > seconds. Newer Intel CPUs might use 'powersave' instead of 'ondemand' and the default could be the one chosen by the kernel's config. I still don't understand this relatively new GOV_SCHEDUTIL thingy, but I didn't have done any research to learn something about it ;). Regarding Ubuntu (at least for Xenial) there indeed is 'ondemand' in /etc/rc.d/, /etc/init.d/. However, I stay with 'powersave' or 'ondemand' as default and change the governor to 'performance' if I run an audio session on all of my Linux installs. Batterie charge OTOH might suffer from 'ondemand'. Thanks to this thread I might understand this GOV_SCHEDUTIL thingy, INTEL_PSTATE seems to affect the defaults. "Note: The intel_pstate driver supports only the performance and powersave governors, but they both provide dynamic scaling. The performance governor should give better power saving functionality than the old ondemand governor [ https://www.phoronix.com/scan.php?page=news_item&px=MTM3NDQ ]." - https://wiki.archlinux.org/index.php/CPU_frequency_scaling#Scaling_governors I noticed that 'irqbalance' is there, too. I don't have a link at hand, but IIRC it shouldn't be used with audio real-time. Just in case I run 'sudo apt purge irqbalance' right now, but usually I'm using Arch where it never was installed. Regards, Ralf _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
