Arch Linux

OrigBitmancer

Member

Registered: 2019-01-22

Posts: 144

[Solved] possible CPU FREQ bug in "make nconfig"?

I have tried to select "Opteron" as CPU type, and "performance" as scheduler for an audio workstation.

When I examine "config" after my attempt to make the changes through "make nconfig" , I get

...
#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_GOV_ATTR_SET=y
CONFIG_CPU_FREQ_GOV_COMMON=y
CONFIG_CPU_FREQ_STAT=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=y
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=m
CONFIG_CPU_FREQ_GOV_USERSPACE=m
CONFIG_CPU_FREQ_GOV_ONDEMAND=m
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m
CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y

which is colliding "schedutil" with "performance", is it not?

AMD Opteron seems to be triggered in

#
# Processor type and features
#
........
CONFIG_X86_AMD_PLATFORM_DEVICE=y

and

#
# CPU frequency scaling drivers
#
CONFIG_CPUFREQ_DT=m
CONFIG_CPUFREQ_DT_PLATDEV=y
....
CONFIG_X86_POWERNOW_K8=m
CONFIG_X86_AMD_FREQ_SENSITIVITY=m

which seems to be acceptable?

Last edited by OrigBitmancer (2019-11-23 18:54:08)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,405

Re: [Solved] possible CPU FREQ bug in "make nconfig"?

What do you mean with "colliding" ? You can have multiple governors set up and switch between them: https://wiki.archlinux.org/index.php/CP … _governors

OrigBitmancer

Member

Registered: 2019-01-22

Posts: 144

Re: [Solved] possible CPU FREQ bug in "make nconfig"?

I did not realize that, and I HAD read those pages at least once.
Note to self: do not post questions after 1am.
Thank you again V1del.