Bug 703544 - 32bit x86 with greater than 32cores often fails cpuscaling
Summary: 32bit x86 with greater than 32cores often fails cpuscaling
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Hardware Certification Program
Classification: Retired
Component: Policy Guide
Version: 6.1
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
: ---
Assignee: Rob Landry
QA Contact:
URL: http://hardware.redhat.com/doc
Whiteboard:
Depends On:
Blocks: 687926
TreeView+ depends on / blocked
 
Reported: 2011-05-10 16:18 UTC by Rob Landry
Modified: 2011-05-23 17:06 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-05-23 17:06:12 UTC


Attachments (Terms of Use)

Description Rob Landry 2011-05-10 16:18:37 UTC
Description of problem:

x86 has a core limit of 32; on systems with greater than 32 cores some # of cores are not within the kernels control.  If these processors are related to cores under the kernels control cpuscaling behavior becomes non-deterministic.


Version-Release number of selected component (if applicable):

6.0-4


How reproducible:

Random, if the core threshold break on the 32core limit and/or the BIOS happens to do the right things to the cores not under kernel control cpuscaling may work.


Additional info:

> 32 core + 32 bit should not be required to pass as this issue is a design limitation of the hardware + RHEL and neither nor v7 can resolve this situation.  A kbase should be opened to reflect this reality but it should not be required to be amended to all 32bit certifications.

Comment 3 Rob Landry 2011-05-23 17:06:12 UTC
A new catalog and policy guide version which addresses this bug is now available on the official website.  If any problems are encountered please open a bug describing the issue selecting the "Red Hat Hardware Certification Program" product.


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