Bug 636103

Summary:	RFE: Logging overhead: Re-work internal logging API to reduce overhead when not logging
Product:	[Community] Virtualization Tools	Reporter:	Daniel Berrangé <berrange>
Component:	libvirt	Assignee:	Libvirt Maintainers <libvirt-maint>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	low
Version:	unspecified	CC:	crobinso, xen-maint
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-01-15 12:16:53 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	636028

Description Daniel Berrangé 2010-09-21 14:17:20 UTC

Description of problem:
Profiling the libvirtd daemon shows logging APIs high in the profile. This needs to be eliminated to ensure low CPU overheads for libvirtd.

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Comment 1 Daniel Berrangé 2015-01-15 12:16:53 UTC

This was addressed in a series of commits

commit 975b2392c3fe1c5ef904c18f8a3bd7a7403798a5
Author: Daniel P. Berrange <berrange>
Date:   Fri Feb 28 13:55:11 2014 +0000

    Switch to filtering based on log source name instead of filename

commit 27f2edf96c1fca1aafaff416e9a44bd962c4cbc4
Author: Daniel P. Berrange <berrange>
Date:   Mon Feb 24 17:22:14 2014 +0000

    Reduce performance overhead of the global log buffer