On Sat, Jan 29, 2011 at 2:39 PM, 陳韋任 <che...@iis.sinica.edu.tw> wrote:
> Hi,
>
>  Thanks for the clarification.
>
>> I think you are confusing the version number of the kernel interface (2.9)
>> with that of the library (3.9). BTW, there is a version 3.10 out.
>
>  So the directory name "examples_v#.x" (which is in the package) means it's
> for particular kernel interface?
>
>> >  And I also note the link belows said "This version of libpfm is NOT
>> > for use with perfmon2.x".
>> Yes, libpfm4 is not for use for perfmon but with perf_events.
>
>  I not sure I totally understand what you said. Since the link said
> "NOT for use with perfmon2.x", is that means libpfm4 is for use with
> perfmon3.x or something else?
>
Yes, libpfm4 is for use with the perf_event kernel interface which appeared
in 2.6.31. Perfmon never made it to upstream kernel. Development of
perfmon has been stopped since early 2009.


>  And I see the website said "libpfm4 offers much better flexibility and
> simplicity to express events". Does it means libpfm4 is much easier to
> use than libpfm3?
>
Yes, it is much easier to use than libpfm3. one can express event filters
and priv levels for instance.


>  Thanks!
>
> Regards,
> chenwj
>
> --
> Wei-Ren Chen (陳韋任)
> Parallel Processing Lab, Institute of Information Science,
> Academia Sinica, Taiwan (R.O.C.)
> Tel:886-2-2788-3799 #1667
>

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