RE: Unable to use Performance counters

[Suthikulpanit, S. <Sur...@am...>]

Hi,

Is "CONFIG_X86_LOCAL_APIC=y" in the kernel config file?

Suravee

-----Original Message-----
From: Maynard Johnson [mailto:may...@us...] 
Sent: Thursday, December 03, 2009 12:04 PM
To: joshiro; Suthikulpanit, Suravee; Andi Kleen
Cc: opr...@li...
Subject: Re: Unable to use Performance counters

joshiro wrote:
> Thanks for the reply. Doing a 'cat /dev/oprofile/cpu_type'  says "timer". So
> I look in Kernel options, below options are set:
> 
> CONFIG_PROFILING=y
> CONFIG_TRACEPOINTS=y
> CONFIG_OPROFILE=y
> CONFIG_HAVE_OPROFILE=y 
> CONFIG_STACKTRACE=y
> CONFIG_NOP_TRACER=y
> CONFIG_RING_BUFFER=y
> CONFIG_TRACING=y
>  I am not sure what more options should I be looking for.
Suravee, Andi . . . any ideas why Joshiro can't get oprofile 0.9.6 to support 
h/w counters on Atom running kernel 2.6.31?

-Maynard
> 
> Thanks.
> 
> 
> joshiro wrote:
>>     I have Oprofile0.9.6 installed on my target which has Atom. I know
>> Atom supports performance counters and the version of Oprofile supports
>> Atom. When I launch the Oprofile daemon, it is set to "timer interrupt "
>> mode. 
>> How do I force it to use the "events" (performance counter mode)
>>     My Linux kernel has both "Profiling Support" and "OProfile system
>> Profiling" enabled. 
>>     Have I missed something else in the kernel(2.6.31.6) config or
>> something went wrong in cross-compile?
>> Thanks in advance.
>>
>>
>