Bug 845484

Summary:	qperf: ud_bw ud_bi_bw ud_lat tests failed when the message size is larger than 2K for 'Local length error'
Product:	Red Hat Enterprise Linux 5	Reporter:	hali
Component:	qperf	Assignee:	Doug Ledford <dledford>
Status:	CLOSED NOTABUG	QA Contact:	Infiniband QE <infiniband-qe>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	5.9	CC:	dledford, kzhang
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	840266	Environment:
Last Closed:	2012-08-13 14:41:56 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:
Bug Depends On:	840266
Bug Blocks:

Comment 1 RHEL Program Management 2012-08-07 08:48:53 UTC

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

Comment 2 Doug Ledford 2012-08-13 14:41:56 UTC

This is not a bug.  The InfiniBand spec says that UD queue pair types can only support data transfers as large as the physical MTU of the link.  What you are seeing is normal whenever the physical MTU of the link is 2k.