intel_lpmd[4038]: Open /proc/sys/kernel/sched_itmt_enabled failed in 6.12 kernel

[user7z]

● intel_lpmd.service - Intel Linux Energy Optimizer (lpmd) Service
Loaded: loaded (/usr/lib/systemd/system/intel_lpmd.service; enabled; preset: disabled)
Active: active (running) since Mon 2024-11-25 13:17:11 +01; 12s ago
Invocation: c820f3ea5eb845c999bab3eeef8a988b
Main PID: 4038 (intel_lpmd)
Tasks: 6 (limit: 38001)
Memory: 1.2M (peak: 2.7M)
CPU: 28ms
CGroup: /system.slice/intel_lpmd.service
└─4038 /usr/bin/intel_lpmd --systemd --dbus-enable

Nov 25 13:17:11 lp systemd[1]: Starting Intel Linux Energy Optimizer (lpmd) Service...
Nov 25 13:17:11 lp intel_lpmd[4038]: Looking for config file /etc/intel_lpmd/intel_lpmd_config_F6_M154_T15.xml
Nov 25 13:17:11 lp intel_lpmd[4038]: Looking for config file /etc/intel_lpmd/intel_lpmd_config_F6_M154.xml
Nov 25 13:17:11 lp intel_lpmd[4038]: Reading configuration file /etc/intel_lpmd/intel_lpmd_config.xml
Nov 25 13:17:11 lp intel_lpmd[4038]: Open /proc/sys/kernel/sched_itmt_enabled failed
Nov 25 13:17:11 lp systemd[1]: Started Intel Linux Energy Optimizer (lpmd) Service.

thats error didnt showed before 6.12 kernel , & why those meteor lake configs in my alderlake platform ? even thogh i delete them , the daemon still search for them !! , is this a normal behaviour ? , what i would expect is to autodiscover the cpu in use & apply its correspounding config.

[zhang-rui]

Does this file "/proc/sys/kernel/sched_itmt_enabled" exist on your platform?

[zhang-rui]

and what platform is this?

[zhang-rui]

BTW, are you running lpmd with HT enabled or disabled?

[user7z]

@zhang-rui
platform : i5-1235-U (alderlake-U)
file existence : the file doesnt exist.
my config:
<Configuration> <Mode>0</Mode> <PerformanceDef>-1</PerformanceDef> <BalancedDef>0</BalancedDef> <PowersaverDef>1</PowersaverDef> <HfiSuvEnable>1</HfiSuvEnable> <util_entry_threshold>15</util_entry_threshold> <util_exit_threshold>90</util_exit_threshold> <EntryDelayMS>0</EntryDelayMS> <ExitDelayMS>0</ExitDelayMS> <EntryHystMS>0</EntryHystMS> <ExitHystMS>0</ExitHystMS> <IgnoreITMT>0</IgnoreITMT> <States> <CPUFamily> 6 </CPUFamily> <CPUModel> 154 </CPUModel> <CPUConfig> 2P8E-15W </CPUConfig> </States> </Configuration>
service log :

● intel_lpmd.service - Intel Linux Energy Optimizer (lpmd) Service
Loaded: loaded (/usr/lib/systemd/system/intel_lpmd.service; enabled; preset: disabled)
Active: active (running) since Tue 2024-11-26 07:27:42 +01; 16min ago
Invocation: 403a0241a096448b9bbe72d005acdfb8
Main PID: 2183 (intel_lpmd)
Tasks: 5 (limit: 38001)
Memory: 32.2M (peak: 32.2M)
CPU: 50ms
CGroup: /system.slice/intel_lpmd.service
└─2183 /usr/bin/intel_lpmd --systemd --dbus-enable

Nov 26 07:27:35 lp systemd[1]: Starting Intel Linux Energy Optimizer (lpmd) Service...
Nov 26 07:27:35 lp intel_lpmd[2183]: Looking for config file /etc/intel_lpmd/intel_lpmd_con>
Nov 26 07:27:35 lp intel_lpmd[2183]: Looking for config file /etc/intel_lpmd/intel_lpmd_con>
Nov 26 07:27:35 lp intel_lpmd[2183]: Reading configuration file /etc/intel_lpmd/intel_lpmd_>
Nov 26 07:27:35 lp intel_lpmd[2183]: Open /proc/sys/kernel/sched_itmt_enabled failed
Nov 26 07:27:42 lp systemd[1]: Started Intel Linux Energy Optimizer (lpmd) Service.

[zhang-rui]

please paste the lscpu output of this platform.

[user7z]

lscpu output

the PKGBUILD