On Mon, Dec 9, 2013 at 7:21 PM, Binh Q. Pham <phambinh1...@gmail.com> wrote:
>
> Sure, they are:
> 1. INSTRUCTION_RETIRED
> 2. CYCLES
> 3. DTLB_LOAD_MISSES:MISS_CAUSES_A_WALK
> 4. DTLB_LOAD_MISSES:WALK_DURATION
> 5. DTLB_LOAD_MISSES:STLB_HIT
> 6. DTLB_STORE_MISSES:MISS_CAUSES_A_WALK
>
If you don't have the NMI watchdog enabled, then 1-6 can go together.
Otherwise, it's 1-5.
> 7. DTLB_STORE_MISSES:WALK_DURATION
> 8. DTLB_STORE_MISSES:STLB_HIT
>
> Please let me know if you need the hexa values of these events as welll.
>
> And what tool or example or you using with those events?
You can pass more events than there are counters, but in that case the
kernel will
multiplex them for you and the tool takes care of scaling the counts for
you.
> Thank you,
> Binh
>
> On 12/06/2013 07:40 PM, Stephane Eranian wrote:
>
> Hi,
>
> Please provide the full list of events you are using.
> Thanks.
> On Dec 3, 2013 1:58 PM, "Binh Q. Pham" <phambinh1...@gmail.com> wrote:
>
>> I am having a problem while using libpfm-4.4.0, which I think related to
>> this question. What I see is that the number of instructions retired
>> drops significantly if I add a few more events to the list of monitored
>> events in my program. I suspect that the added events conflict with the
>> existing ones, hence brings the actual count down. Do you have the same
>> thoughts?
>> Also, could you point me to where I can find information about these
>> conflicting events in order to configure them correctly? How can I know
>> how many performance counters that my CPU has?
>>
>> Thanks,
>> Binh
>> On 07/23/2013 02:22 AM, Stephane Eranian wrote:
>> > Hi,
>> >
>> > On Tue, Jul 23, 2013 at 2:25 AM, Leonardo Piga <leonardo.p...@gmail.com>
>> wrote:
>> >> Hello,
>> >>
>> >> I am trying to measure some performance counters on Ivy Bridge, which
>> has 4
>> >> PCM. I would like to know if there is a way to group up counters so
>> that I
>> >> can measure events on the same time.
>> >>
>> >> For example, I need to measure 8 counters (e.g., A,B,C,D,E,F,G,H). And
>> I
>> >> would like to sample A,B,C,D together and E,F,G,H together.
>> >>
>> >> How can I do this using libpfm? I saw that task.c on perf_examples has
>> a way
>> >> to group up counters, but I couldn't use it.
>> >>
>> > task -e A,B,C,D -e E,F,G,H .....
>> >
>> > Of course in each group, events have to be compatible with each other.
>> > That means they cannot conflict on a counter. If so then, try moving the
>> > conflicting events to separate groups.
>> >
>> > Also a group cannot have more events than there are counters.
>> > Note that by default the NMI watchdog uses one counter and runs
>> > all the time unless you disable it via /proc/sys/kernel/nmi_watchdog.
>> >
>> >> Thank you for any help,
>> >>
>> >> --
>> >> Leonardo
>> >>
>> >>
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>>
>> --
>> -Binh
>>
>>
>>
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>
>
> --
> -Binh
>
>
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