Re: Does Perf support AMD cpu perfectly?

[Chulmin Kim <cmkim@core.kaist.ac.kr>]

Update for this issue.

I'm investigating the kernel source.

I found that Perf for AMD seems imperfect in linux 3.0 (my machine's
linux version).

For AMD family 15h, there is a commented line as follow.
 - /* nortbridge counters not yet implemented: */  (line 541,
perf_event_amd.c )


According to my further exploration, linux 3.2 does not support it either.

Does any of you know or have the patch for it?


2012-11-26 오후 9:15, Chulmin Kim 쓴 글:
> Update for this issue.
> 
> - rc0 and instruction events show the similar result.
> - still, the count of L3 cache miss event is 1/10 of what i expected.
> (LLC-load-misses)
> 
> 
> 
> 2012-11-26 오후 8:24, Chulmin Kim 쓴 글:
>> Hi all.
>>
>> I'm on the way of monitoring AMD machine.
>>
>> I wonder Perf is supporting AMD PMU Events perfectly or not.
>>
>> It seems not working correctly despite the same command works in intel
>> machines perfectly.
>>
>> command : (perf stat -e rc0 -e instructions ./blah)
>> result : the value for "rc0" almost equals to that of "instruction" in
>> Intel machine, while it does not in AMD machine
>>
>>
>> Other events such as cache events seem weird also.
>>
>> Is there any material mentioning this issue?
>>
>>
>>
>> Thanks!
>>
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