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 <eranian@googlemail.com> wrote:
On Mon, Sep 9, 2013 at 4:35 PM, Bhavishya Goel <bhavishya.goel@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 <eranian@googlemail.com>
> wrote:
>>
>> On Tue, Sep 3, 2013 at 8:51 AM, Bhavishya Goel <bhavishya.goel@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?
>>
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