Differential D57825

hwpstate_amd: Detect ACPI _CPC object to enable CPPC
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Authored by aokblast on Wed, Jun 24, 6:24 PM.

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Referenced Files

	F160522256: D57825.id180557.diff
	Thu, Jun 25, 8:09 AM

	F160508653: D57825.diff
	Thu, Jun 25, 5:24 AM

	F160504243: D57825.diff
	Thu, Jun 25, 4:40 AM

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Summary

We find some devices' CPU with CPPC support breaks the autonomous mode.
However, without Kernel Governer, making CPU stay in highest_performace
largely increase the CPU power consumption. As a concession, we enforace
ACPI _CPC check to enable CPPC by default. Also, provide a sysctl to
disable this check.

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Repository

rG FreeBSD src repository

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Lint Passed

Unit

No Test Coverage

Build Status

Buildable 74246
Build 71129: arc lint + arc unit

Event Timeline

aokblast created this revision.Wed, Jun 24, 6:24 PM

Herald added a subscriber: imp. · View Herald TranscriptWed, Jun 24, 6:24 PM

aokblast requested review of this revision.Wed, Jun 24, 6:24 PM

Harbormaster completed remote builds in B74207: Diff 180557.Wed, Jun 24, 6:24 PM

aokblast added a reviewer: olce.Wed, Jun 24, 6:24 PM

aokblast added parent revisions: D55505: acpi_perf: Mark readonly when using FFH, D55476: x86: Implement Functional Fixed Hardware in SYS_RES, D55475: acpi: Support Functional Fixed Hardware, D55474: acpi_cppc: Add cppc library for parsing ACPI _CPC object..

Enable FFH

Harbormaster completed remote builds in B74245: Diff 180618.Thu, Jun 25, 1:22 PM

Minor fixes

Harbormaster completed remote builds in B74246: Diff 180619.Thu, Jun 25, 1:30 PM

Revision Contents
Changeset List

Path

Size

sys/

x86/

cpufreq/

53 lines

Diff 180619

sys/x86/cpufreq/hwpstate_amd.c

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