On Fri, Jul 24, 2020 at 10:19:25AM -0400, Liang, Kan wrote:
> There will be a problem for the current perf tool, which assumes that the
> leader event is the sampling event.
>
> I will check how can we specially handle it in the perf tool.
Ah, okay. I've long lost track of how the tool works :/
Something that seems to 'work' is:
'{cycles,cpu/instructions,period=50000/}', so maybe you can make the
group modifier :S use any sampling event if there is one, and otherwise
designate the leader.
Then you can write things like:
'{slots, metric1, metric2, cpu/cycles,freq=50000/}:S'
and then since cycles is specified as a sampling event, it will use
that.
