Bug 181346 - [hwpmc] Sandy Bridge Xeon - workaround required for some perf events
Summary: [hwpmc] Sandy Bridge Xeon - workaround required for some perf events
Status: Open
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 1.0-CURRENT
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-bugs (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-08-16 21:30 UTC by Adrian Chadd
Modified: 2017-12-31 22:27 UTC (History)
0 users

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Description Adrian Chadd freebsd_committer freebsd_triage 2013-08-16 21:30:00 UTC
There's a workaround required for some events on Sandy bridge Xeon hardware.

http://software.intel.com/en-us/articles/performance-monitoring-on-intel-xeon-processor-e5-family

Here's the workaround packaged up in a linux-specific python script. ugh.

https://github.com/andikleen/pmu-tools/blob/master/latego.py

I have no idea about the specifics of the workaround; only that we should likely add support to hwpmc to do this.
Comment 1 Eitan Adler freebsd_committer freebsd_triage 2017-12-31 08:00:28 UTC
For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

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