Yes, that's what I am doing. Below is an example of the counts I get from
task vs task_cpu from a 4-threaded binary:
$> task -i -e INSTRUCTIONS_RETIRED ./binary
27 708 362 452 INSTRUCTIONS_RETIRED
$> task_cpu -i -e INSTRUCTIONS_RETIRED ./binary
CPU0 29 529 250 689 INSTRUCTIONS_RETIRED
CPU1 26 991 683 307 INSTRUCTIONS_RETIRED
CPU2 24 404 405 488 INSTRUCTIONS_RETIRED
CPU3 30 442 586 081 INSTRUCTIONS_RETIRED
Adding up the task_cpu counts from all 4 CPUs will give me instructions
retired count which is almost four times of what I get from task. And I
know the count from task is correct because this is very close to what I
get from Intel PCM-TSX tool. Can you tell me what am I doing wrong?
On Mon, Sep 9, 2013 at 4:46 PM, Stephane Eranian <eran...@googlemail.com>wrote:
> On Mon, Sep 9, 2013 at 4:35 PM, Bhavishya Goel <bhavishya.g...@gmail.com>
> wrote:
> > It is multi-threaded.
> >
> >
> Then you need to add up all the counts from all the CPUs.
>
> > On Mon, Sep 9, 2013 at 4:26 PM, Stephane Eranian <eran...@googlemail.com
> >
> > wrote:
> >>
> >> On Tue, Sep 3, 2013 at 8:51 AM, Bhavishya Goel <
> bhavishya.g...@gmail.com>
> >> wrote:
> >> > Hi,
> >> >
> >> > I am using "task_cpu" example in perf_examples folder of libpfm4.4
> >> > (linux
> >> > kernel 3.11-rc7, micrarchitecture: haswell). The counter numbers that
> I
> >> > get
> >> > from task_cpu seem to be wrong as they are vastly different than what
> I
> >> > get
> >> > from "task" example and Intel's PCM-TSX tool. This is an example of
> >> > command
> >> > line I use:
> >> >
> >> > task_cpu -i -e INSTRUCTIONS_RETIRED ./binary
> >> >
> >> > task -i -e INSTRUCTIONS_RETIRED ./binary
> >> >
> >> > The counter numbers from task_cpu are almost double of numbers from
> >> > task.
> >> > While, the numbers from PCM-TSX match the numbers from task. Is it a
> bug
> >> > of
> >> > am I doing something wrong?
> >> >
> >> Sorry for late reply.
> >> Is your binary multi-process or multi-thread?
> >>
> >> > --
> >> > ಠ_ಠ
> >> >
> >> >
> >> >
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