Bug 494624 - Add tuna interface to perf-counters in 2.6.29 RT kernel
Summary: Add tuna interface to perf-counters in 2.6.29 RT kernel
Keywords:
Status: CLOSED DUPLICATE of bug 666958
Alias: None
Product: Red Hat Enterprise MRG
Classification: Red Hat
Component: realtime-utilities
Version: Development
Hardware: All
OS: Linux
low
medium
Target Milestone: ---
: ---
Assignee: Arnaldo Carvalho de Melo
QA Contact: David Sommerseth
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2009-04-07 15:46 UTC by Clark Williams
Modified: 2016-05-22 23:28 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-05-08 13:34:05 UTC
Target Upstream Version:
Embargoed:

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Description Clark Williams 2009-04-07 15:46:46 UTC 
Description of problem:

New CPU cores have a builtin set of registers known as performance counters or perfcounters. The 2.6.29-rtX RT patch series contains snapshots of the -tip versions of code to manage access to perfcounters. Tuna should add code to display the contents of available perfcounters during a tuning session.
Comment 1 Arnaldo Carvalho de Melo 2011-02-28 17:18:13 UTC 
Support for using the perf events to notice the creation/destruction of threads has been commited upstream and should get into a MRG test package soon.
Comment 2 Arnaldo Carvalho de Melo 2012-05-08 13:30:17 UTC 
Tuna should use the perf infrastrucure to stop polling /proc and instead get perf events notifications for new threads.
Comment 3 Arnaldo Carvalho de Melo 2012-05-08 13:34:05 UTC 

*** This bug has been marked as a duplicate of bug 666958 ***
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