Bug 436862 – editorial comments on latency tracer comments

Bug 436862 - editorial comments on latency tracer comments

Summary:	editorial comments on latency tracer comments

Status:	CLOSED DUPLICATE of bug 442990

Aliases:	None

Product:	Red Hat Enterprise MRG
Classification:	Red Hat
Component:	Realtime_Tuning_Guide (Show other bugs)
Sub Component:
Version:	beta
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Steven Rostedt
QA Contact:	Jeff Needle
Docs Contact:

URL:	http://rt.et.redhat.com/page/RHEL-RT_...
Whiteboard:
Keywords:	Documentation

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2008-03-10 16:00 EDT by Lana Brindley
Modified:	2013-10-23 19:06 EDT (History)
CC List:	1 user (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2008-04-21 20:52:23 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Lana Brindley 2008-03-10 16:00:09 EDT

Description of problem:

There are a number of "editorial ocmments" on the latency tracer howto. Can I
please have someone respond to the issues raised in order to finish this chapter.

Assigned to Clark for distribution :)

LKB

Comment 1 Clark Williams 2008-03-11 14:29:22 EDT

Lana,

the Latency Tracer functionality is being rewritten by Steven Rostedt. I can
think of no one better equipped to provide content.

Reassigning to srostedt.

Clark

Comment 2 Lana Brindley 2008-03-11 16:48:37 EDT

Thanks Clark.

Steven, in your re-write, can you please explain the statement below for me too?

"Another way of using the tracing infrastructure is by enabling
/proc/sys/kernel/trace_user_triggered. That will trace only processes that
explicitly used the prctl(0, 1) syscall just before the critical session where
tracing is desired and prctl(0, 0) after it."

I don't really understand what effect the prctl() calls have on both the process
and the tracer.

Thanks,
Lana

Comment 3 Lana Brindley 2008-03-26 23:06:11 EDT

Steven, This is a friendly reminder :) LKB

Comment 4 Lana Brindley 2008-04-21 20:52:23 EDT


*** This bug has been marked as a duplicate of 442990 ***

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