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Bug 1554090

Summary:	Add WPP tracing to virtio-net's Windows driver
Product:	Red Hat Enterprise Linux 7	Reporter:	Sameeh Jubran <sjubran>
Component:	virtio-win	Assignee:	Sameeh Jubran <sjubran>
virtio-win sub component:	virtio-win-prewhql	QA Contact:	Virtualization Bugs <virt-bugs>
Status:	CLOSED DUPLICATE	Docs Contact:
Severity:	unspecified
Priority:	medium	CC:	ailan, juzhang, lijin, michen, mtessun, sjubran, wyu
Version:	7.5	Keywords:	FutureFeature
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:	Feature: WPP tracing Reason: better than the old style debug prints Result:	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-06-19 10:11:10 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Sameeh Jubran 2018-03-11 11:47:05 UTC

Description of problem:

Currently in NetKVM - The virtio-net's Windows driver - the debug prints are done using the debug print function that is viewable by DebugView.

WPP tracing has some advantages over debug print call:

* It can be enabled, disabled and filtered at runtime with minimal overhead
* Traces are are automatically included in the crash dumps
* Logs can be easily collected using a script
* Time Stamps, Function names and some other useful data can be easily included into log.

Comment 2 Sameeh Jubran 2018-03-11 11:58:30 UTC

The WPP was added in the following commit:

https://github.com/virtio-win/kvm-guest-drivers-windows/commit/2cc38bac8180983c6e978abac17ed49acdb5fc82

The Documentation can be found here:

https://github.com/virtio-win/kvm-guest-drivers-windows/blob/master/NetKVM/Documentation/Tracing.md

Comment 3 Sameeh Jubran 2018-03-12 13:51:42 UTC

I have added few scripts that help in automating the log collection and parsing process in the following pull request which has already been merged:

https://github.com/virtio-win/kvm-guest-drivers-windows/pull/252

Comment 6 Sameeh Jubran 2018-06-19 10:11:10 UTC

The BZ#1556868 is more general and includes WPP support for kvm-guest-drivers which include virtio-net's Windows driver (netkvm).

*** This bug has been marked as a duplicate of bug 1556868 ***