Re: Link between Intel documentation events and perf list events

[Andreas Hollmann <hollmann@in.tum.de>]

Hi,

since Kernel version 3.7 you can lookup the used raw event in
/sys/device/cpu/events and compare it
to Table 18-1 SDM Volume 3B: System Programming Guide, Part 2.

$ cd /sys/devices/cpu/events/
$ echo *; cat *
branch-instructions branch-misses cache-misses cache-references
cpu-cycles instructions
event=0xc4
event=0xc5
event=0x2e,umask=0x41
event=0x2e,umask=0x4f
event=0x3c
event=0xc0

Here is commit from Jiri Olsa that makes it possible.
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a47473939db20e3961b200eb00acf5fcf084d755

Regards,
Andreas



2013/7/2 Manuel Selva <manuel.selva@insa-lyon.fr>:
> Thanks for the answer Andi.
>
> On a more general sense, how one can link perf events (as reported by perf
> list) to hardware documentation ? Is there some document explaining that or
> should I dig into the perf code source code in the Linux kernel ?
>
> Manu
>
>
> On 07/02/2013 05:55 AM, Andi Kleen wrote:
>>
>> Manuel Selva<manuel.selva@insa-lyon.fr>  writes:
>>
>>> My question is about the link between events reported in Intel
>>> documentation and events listed by perf list. Is the perf list
>>> cache-misses event the same than the one mentioned as Last-level cache
>>> missesin Intel documentation ?
>>
>> Yes it is
>>
>> (at least currently, perf events are not particularly well defined
>> and have changed in the past. However this one is proably not likely
>> to change)
>>
>> -Andi
>>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-perf-users"
> in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html