Re: [PATCH v3 3/5] perf stat: Remove evlist__add_default_attrs use strings

[James Clark <james.clark@arm.com>]

On 10/05/2024 06:37, Ian Rogers wrote:
> add_default_atttributes would add evsels by having pre-created
> perf_event_attr, however, this needed fixing for hybrid as the
> extended PMU type was necessary for each core PMU. The logic for this
> was in an arch specific x86 function and wasn't present for ARM,
> meaning that default events weren't being opened on all PMUs on
> ARM. Change the creation of the default events to use parse_events and
> strings as that will open the events on all PMUs.
> 
> Rather than try to detect events on PMUs before parsing, parse the
> event but skip its output in stat-display.
> 
> The previous order of hardware events was: cycles,
> stalled-cycles-frontend, stalled-cycles-backend, instructions. As
> instructions is a more fundamental concept the order is changed to:
> instructions, cycles, stalled-cycles-frontend, stalled-cycles-backend.
> 
> Closes: https://lore.kernel.org/lkml/CAP-5=fVABSBZnsmtRn1uF-k-G1GWM-L5SgiinhPTfHbQsKXb_g@mail.gmail.com/

Taking a look at this one now. I think some example commands and outputs
in the commit message would be helpful because there are quite a few
different things mentioned in the closes link.

But I'm assuming this is just for the command without specifying an event:

  $ perf stat

I didn't realise that wasn't working properly and I'd missed that Mark
spotted it in that link.