Re: [PATCH v4 01/10] tools/perf: support parsing parameterized events

From: Jiri Olsa
Date: Thu Sep 25 2014 - 04:59:50 EST

On Wed, Sep 24, 2014 at 12:27:15PM -0700, Sukadev Bhattiprolu wrote:
> From: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
> Enable event specification like:
> pmu/event_name,param1=0x1,param2=0x4/
> Assuming that
> /sys/bus/event_source/devices/pmu/events/event_name
> Contains something like
> param2=foo,bar=1,param1=baz

hum, so what happened to the '?' ... AFAIU from out last discussion,
you wanted to mark terms which are mandatory and user must provide
values for them.. and I thought the decision was to have following
alias record:

$ cat /sys/bus/event_source/devices/pmu/events/event_name

while perf would scream if any of param1/2 wasnt filled like for:

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