Bug 598593

Summary:	Best clocksource on 2.6.18-194.el5.x86_64 kernel is jiffies
Product:	Red Hat Enterprise Linux 5	Reporter:	Matthew Whitehead <mwhitehe>
Component:	kernel	Assignee:	Red Hat Kernel Manager <kernel-mgr>
Status:	CLOSED NOTABUG	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.5	CC:	tao
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-06-04 14:31:17 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Matthew Whitehead 2010-06-01 17:03:13 UTC

Description of problem: Best clocksource on 2.6.18-194.el5.x86_64 kernel is jiffies


Version-Release number of selected component (if applicable): kernel 2.6.18-194.el5.x86_64


How reproducible: 100% on available hardware


Steps to Reproduce:
1. cat /sys/devices/system/clocksource/clocksource0/available_clocksource
2.
3.
  
Actual results: jiffies


Expected results: tsc, hpet, and pit


Additional info:

Comment 1 Prarit Bhargava 2010-06-04 14:31:17 UTC

Hi,

/sys does not report a valid clock for x86_64.  This is a known discrepancy on the arch and in RHEL5.

P.