Bug 712439 – Backport "x86: extend debug key 't' to collect useful clock skew info"

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Bug 712439 - Backport "x86: extend debug key 't' to collect useful clock skew info"

Summary:	Backport "x86: extend debug key 't' to collect useful clock skew info"

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 5
Classification:	Red Hat
Component:	kernel-xen (Show other bugs)
Sub Component:
Version:	5.6
Hardware:	Unspecified Unspecified

Priority	unspecified Severity unspecified
Target Milestone:	rc
Target Release:	---
Assigned To:	Paolo Bonzini
QA Contact:	Virtualization Bugs
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:	514490 KernelXenUpstreamHV
	Show dependency tree / graph

Reported:	2011-06-10 11:54 EDT by Paolo Bonzini
Modified:	2012-02-20 22:35 EST (History)
CC List:	7 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2012-02-20 22:35:23 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2012:0150	normal	SHIPPED_LIVE	Moderate: Red Hat Enterprise Linux 5.8 kernel update	2012-02-21 02:35:24 EST

Groups: None (edit)

Description Paolo Bonzini 2011-06-10 11:54:44 EDT

http://xenbits.xen.org/hg/staging/xen-unstable.hg/rev/18151

Comment 1 Laszlo Ersek 2011-07-13 13:24:07 EDT

Paolo posted
http://post-office.corp.redhat.com/archives/rhkernel-list/2011-July/msg00605.html

Comment 2 RHEL Product and Program Management 2011-08-04 00:14:15 EDT

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 4 Jarod Wilson 2011-08-23 10:03:06 EDT

Patch(es) available in kernel-2.6.18-282.el5
You can download this test kernel (or newer) from http://people.redhat.com/jwilson/el5
Detailed testing feedback is always welcomed.

Comment 6 Qin Guan 2011-11-21 02:27:13 EST

Verify this fix with 2.6.18-298.el5xen.

# xm debug-key h ; xm dmesg | grep clock
(XEN)  key \047t\047 (ascii \04774\047) => display multi-cpu clock info

# xm debug-key t; xm dmesg | tail 
(XEN)  key \047u\047 (ascii \04775\047) => dump numa info
(XEN)  key \047v\047 (ascii \04776\047) => dump Intel\047s VMCS
(XEN)  key \047z\047 (ascii \0477a\047) => print ioapic info
(XEN) Synced stime skew: max=414ns avg=414ns samples=1 current=414ns
(XEN) Synced cycles skew: max=2019 avg=2019 samples=1 current=2019
(XEN) Synced stime skew: max=457ns avg=435ns samples=2 current=457ns
(XEN) Synced cycles skew: max=2019 avg=2007 samples=2 current=1995
(XEN) Synced stime skew: max=745ns avg=538ns samples=3 current=745ns
(XEN) Synced cycles skew: max=3021 avg=2345 samples=3 current=3021

Comment 7 errata-xmlrpc 2012-02-20 22:35:23 EST

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2012-0150.html

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