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 9
Thanks Stephane. That works for me.
On Mon, Sep 9, 2013 at 6:58 PM, Stephane Eranian wrote:
> Hi,
>
> I get the same thing with my own little multithreaded benchmark.
>
> I think it has to do with what happens in per-thread/per-cpu mode
> with inheritance. I think each events of the child thread
On Mon, Sep 9, 2013 at 4:35 PM, Bhavishya Goel 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
> wrote:
>>
>> On Tue, Sep 3, 2013 at 8:51 AM, Bhavishya Goel
>> wrote:
>> > Hi,
>> >
>> > I am using "t
Hi,
I get the same thing with my own little multithreaded benchmark.
I think it has to do with what happens in per-thread/per-cpu mode
with inheritance. I think each events of the child threads are propagated
to each parent. I get 12x the amount on my 12 CPUs workstation.
If you drop -i in task_c
It is multi-threaded.
On Mon, Sep 9, 2013 at 4:26 PM, Stephane Eranian wrote:
> On Tue, Sep 3, 2013 at 8:51 AM, Bhavishya Goel
> 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
On Tue, Sep 3, 2013 at 8:51 AM, Bhavishya Goel 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
> fr
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
