Bug 162766

Summary:	PAPI/perfctr does not work
Product:	Red Hat Enterprise Linux 3	Reporter:	Steven Brandt <sbrandt>
Component:	kernel	Assignee:	Brian Maly <bmaly>
Status:	CLOSED WONTFIX	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	3.0	CC:	peterm, petrides
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-04-19 20:02:19 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Steven Brandt 2005-07-08 14:47:33 UTC

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Description of problem:
PAPI/perfctr does not seem to work on Red Hat.

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


How reproducible:
Always

Steps to Reproduce:
1. Install kernel patch from PAPI: http://icl.cs.utk.edu/papi/
2. load perfctr module
3. run papi test suite
  

Actual Results:  tests fail.  PAPI tries to make a /proc/self/perfctr file and does not succeed.

Expected Results:  PAPI test suite should pass.

Additional info:

dmesg contains the following, so something somewhere is partly working:
PERFCTR INIT: vendor 0, family 15, model 2, stepping 4, clock 1799842 kHz
PERFCTR INIT: NITER == 64
PERFCTR INIT: loop overhead is 512 cycles
PERFCTR INIT: rdtsc cost is 82.8 cycles (5816 total)
PERFCTR INIT: rdpmc cost is 372.1 cycles (24332 total)
PERFCTR INIT: rdmsr (counter) cost is 251.7 cycles (16624 total)
PERFCTR INIT: rdmsr (escr) cost is 166.8 cycles (11188 total)
PERFCTR INIT: wrmsr (counter) cost is 849.8 cycles (54900 total)
PERFCTR INIT: wrmsr (escr) cost is 921.0 cycles (59456 total)
PERFCTR INIT: read cr4 cost is 5.1 cycles (840 total)
PERFCTR INIT: write cr4 cost is 253.3 cycles (16728 total)
PERFCTR INIT: rdpmc (fast) cost is 61.5 cycles (4448 total)
PERFCTR INIT: rdmsr (cccr) cost is 167.6 cycles (11244 total)
PERFCTR INIT: wrmsr (cccr) cost is 873.8 cycles (56436 total)
PERFCTR INIT: write LVTPC cost is 33.6 cycles (2668 total)
PERFCTR INIT: sync_core cost is 261.6 cycles (17260 total)
perfctr: driver 2.6.13 DEBUG, cpu type Intel P4 at 1799842 kHz

Comment 1 Ernie Petrides 2005-07-14 20:23:56 UTC

Steven, what's this bug about?  We don't support custom-built kernels.
Are you trying to propose an enhancement?  Or is there some problem with
a stock RHEL3 kernel?

Thanks in advance for more info.  -ernie