Hi all,
I am a newbie to perfmon (actually I have no experience in using this
tool).
I am working on a project using hardware performance monitoring counters
to analyze applications running on an Intel processor. I have not used any
tools such as Vtune or perfmon so far, but with my own program. In the
current implementation, the counter values are read through a file under
/proc (thus I need to create a proc_entry before the sampling and read the
values to this file during execution), and the samplings are implemented by
inserting a task into the delayed work queue. By doing this, I am able to
read the performance counter values at fixed time intervals, say, once a
second.
However, I want to read the counters in another way. Namely, rather than
collect those counters every second, I would like to read them after every
million instructions are executed. That is, read the counter values when 1M,
2M, 3M....instructions are executed. I have no clue on this change.
Therefore, I am wondering if perfmon provides an easy approach to carry
out this kind of measurement (reading counters when 1M, 2M, 3M...
instructions are retired). If the answer is positive, I'll switch to use
perfmon and hope that anyone can tell me how to do that.
Any suggestions will be appreciated.
By the way, I am using Fedora 13 with kernel 2.6.33.
Thanks,
Ying Zhang
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