performance counter for linux question.

performance counter for linux question.

[sebastien cabaniols]

Hello list,

I am interested by monitoring instructions versus cycles with a Nehalem box 
using 2.6.31 with PCL.

Is there a way with perf report to display both counters ?

I used

perf record -e cycles -e instructions -a  for the recording session.

perf report -n seems to be doing what I need but for only one counter.

Is this a limitation of perf report ? 
Is this an architectural limitation of PCL ?
Is there more documentation than what is in the perf directory in the 2.6.31 
tarball ?


-- 
Sébastien Cabaniols
SCI Presales EMEA HP
current timezone = UTC+2 (localtime is approx. 14:20)

Re: performance counter for linux question.

[Ingo Molnar]

* sebastien cabaniols <sebastien.cabaniols@hp.com> wrote:

> Hello list,
> 
> I am interested by monitoring instructions versus cycles with a Nehalem box 
> using 2.6.31 with PCL.
> 
> Is there a way with perf report to display both counters ?
> 
> I used
> 
> perf record -e cycles -e instructions -a  for the recording session.
> 
> perf report -n seems to be doing what I need but for only one counter.
> 
> Is this a limitation of perf report ? 
> Is this an architectural limitation of PCL ?
> Is there more documentation than what is in the perf directory in the 2.6.31 
> tarball ?

You can find a description and a tutorial here:

  http://lwn.net/Articles/339361/

There's also http://perf.wiki.kernel.org.

	Ingo