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HfiLpmEnable set to 1 prevents from entering the low power mode on i7-1260P

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
42/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
c, fedora
Domain
operating-systems, performance

Research direction

Start by reproducing the issue on the reported Framework 13 with the supplied XML configurations, comparing the logs after running sudo intel_lpmd_control AUTO with HfiLpmEnable set to 1 and 0. No source file or test is named; done means AUTO enters low power mode with HfiLpmEnable set to 1 without regressing the working setting.

Written by the indexing model from the issue text.

Description

I've migrated from intel_lpmd 0.0.3 to 0.0.4 and migrated most of my configuration. Unfortunately, intel_lpmd won't enter low power mode when HfiLpmEnable is set to 1. When set to 0, it intel_lpmd enters low power modes correctly.

Log for HfiLpmEnable 1 :

Jun 14 11:19:03 framework systemd[1]: Starting intel_lpmd.service - Intel Low Power Daemon Service...
Jun 14 11:19:03 framework intel_lpmd[30907]: Reading configuration file /etc/intel_lpmd/intel_lpmd_config.xml
Jun 14 11:19:03 framework systemd[1]: Started intel_lpmd.service - Intel Low Power Daemon Service.

-> after issuing sudo intel_lpmd_control AUTO, nothing happens in the logs.

Log for HfiLpmEnable 0 :

Jun 14 11:24:37 framework systemd[1]: Starting intel_lpmd.service - Intel Low Power Daemon Service...
Jun 14 11:24:37 framework intel_lpmd[32726]: Reading configuration file /etc/intel_lpmd/intel_lpmd_config.xml
Jun 14 11:24:37 framework systemd[1]: Started intel_lpmd.service - Intel Low Power Daemon Service.
Jun 14 11:24:57 framework intel_lpmd[32726]: ------ Enter Low Power Mode ( utl enter) --- Fri Jun 14 11:24:57 2024

-> after issuing sudo intel_lpmd_control AUTO, the 4th line is logged.

XML configuration (HfiLpmEnable 1):

<?xml version="1.0"?>
<Configuration>
	<lp_mode_cpus></lp_mode_cpus>
	<lp_mode_epp>-1</lp_mode_epp>
	<Mode>0</Mode>
	<PerformanceDef>0</PerformanceDef>
	<BalancedDef>0</BalancedDef>
	<PowersaverDef>0</PowersaverDef>
	<HfiLpmEnable>1</HfiLpmEnable>
	<WLTHintEnable>1</WLTHintEnable>
	<HfiSuvEnable>1</HfiSuvEnable>
	<util_entry_threshold>10</util_entry_threshold>
	<util_exit_threshold>95</util_exit_threshold>
	<EntryDelayMS>0</EntryDelayMS>
	<ExitDelayMS>0</ExitDelayMS>
	<EntryHystMS>2000</EntryHystMS>
	<ExitHystMS>3000</ExitHystMS>
	<IgnoreITMT>0</IgnoreITMT>
	<States>
		<CPUFamily> 6 </CPUFamily>
		<CPUModel> 154 </CPUModel>
		<CPUConfig> 8P8E0L-28W </CPUConfig>
		<State>
			<ID> 1 </ID>
			<Name> LPM_DEEP </Name>
			<EntrySystemLoadThres> 5 </EntrySystemLoadThres>
			<EnterCPULoadThres> 50 </EnterCPULoadThres>
			<EPP> -1 </EPP>
			<EPB> -1 </EPB>
			<ITMTState> -1 </ITMTState>
			<IRQMigrate> 1 </IRQMigrate>
			<ActiveCPUs>14,15</ActiveCPUs>
			<MinPollInterval> 500 </MinPollInterval>
			<PollIntervalIncrement> 500 </PollIntervalIncrement>
			<MaxPollInterval> 2000 </MaxPollInterval>
		</State>
		<State>
			<ID> 2 </ID>
			<Name> LPM_LOW </Name>
			<EntrySystemLoadThres> 10 </EntrySystemLoadThres>
			<ExitSystemLoadhysteresis> 3 </ExitSystemLoadhysteresis>
			<EPP> -1 </EPP>
			<EPB> -1 </EPB>
			<ITMTState> -1 </ITMTState>
			<IRQMigrate> 1 </IRQMigrate>
			<ActiveCPUs>12-15</ActiveCPUs>
			<MinPollInterval> 1000 </MinPollInterval>
			<PollIntervalIncrement> 1000 </PollIntervalIncrement>
			<MaxPollInterval> 3000 </MaxPollInterval>
		</State>
		<State>
			<ID> 3 </ID>
			<Name> FULL_POWER </Name>
			<EntrySystemLoadThres></EntrySystemLoadThres>
			<EnterCPULoadThres></EnterCPULoadThres>
			<EPP> -1 </EPP>
			<EPB> -1 </EPB>
			<ITMTState> -1 </ITMTState>
			<IRQMigrate> 1 </IRQMigrate>
			<ActiveCPUs>0-15</ActiveCPUs>
			<MinPollInterval> 500 </MinPollInterval>
			<PollIntervalIncrement> -1 </PollIntervalIncrement>
			<MaxPollInterval> 2000 </MaxPollInterval>
		</State>
	</States>
</Configuration>

System:
Framework 13, Intel i7-1260P, Fedora 40.

Dominant language
C
Stars
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Forks
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Avg merge
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Merged PRs (30d)
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