Re: operf fails on event uops_issued and mem_trans_retired

[Andi K. <an...@fi...>]

> > The problem you are running into is caused by the fact that there's no way to specify the default unit mask (0x01), since the numerical value is non-unique.  Aside from that, the question arises of "which 0x1 unit mask is the default supposed to reference?".  A reasonable guess would be the first entry (all All uops that actually retired), but it's unnecessarily ambiguous.  Also, that first entry does not have the "extra" parameter, so it can't be specified by name.  If you try to specify that first UM using 'all', you get the following error:

I would just like to take that check out. No user should ever need
to use numerical unit masks.  I usually disable it in my own
oprofiles as I never saw the the point of it.

Intel doesn't support combining multiple unit masks, so exposing the
numerical values is not useful. And it's unfriendly too.

The supported events are a unique combination of
event id, unit mask, additional bits like pebs, any, cmask etc.

The name + named unit mask describes such a combination uniquely.
Other combinations are not supported.


-Andi