Bug 705146

Summary:	processor ACPI not exposed via /proc
Product:	[Fedora] Fedora	Reporter:	Jon Stanley <jonstanley>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	15	CC:	gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda
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Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:	2011-05-20 17:23:12 UTC	Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Jon Stanley 2011-05-16 19:00:46 UTC

It would appear that processor ACPI states are not exposed in /proc in 2.6.38.6-26.rc1.fc15.x86_64

# cat /boot/config-2.6.38.6-26.rc1.fc15.x86_64 | fgrep ACPI
<snip>
CONFIG_ACPI_PROCESSOR=y

This is useful to determine if you are incurring c-state related performance penalties or not, and should be in /proc/acpi/processor/CPU<X>/power

Is this a bug, or is there some other place to obtain the same information now?

Comment 1 Jon Stanley 2011-05-16 21:08:23 UTC

I tried going back to 2.6.38-0.rc8.git0.1.fc15.x86_64 and it's still not there. I'm not exactly sure where this disappeared at.

Comment 2 Chuck Ebbert 2011-05-16 23:42:06 UTC

If /sys/devices/system/cpu/cpuidle/current_driver is intel_idle then acpi_idle is not being used. Generic stats should always be in /sys/devices/system/cpu/cpu0/cpuidle/* no matter which idle driver is in use.