Messages in this thread | | | From | Ulrich Drepper <> | Date | Wed, 16 Jan 2013 10:12:14 -0500 | Subject | Re: [RFC 0/4] perf tool: Adding ratios support |
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On Wed, Jan 16, 2013 at 9:25 AM, Jiri Olsa <jolsa@redhat.com> wrote: > I was thinking having config files (global and arch specific) > comming with perf having predefined formulas.
All the more reason to not mention the file name or really any source for the definition of the formula in the name,
> 1) -e 'ratio/branch-rate/' # special event class > 2) -e 'ratio-branch-rate' # 'ratio-' prefix > 3) -e cpu/branch-rate/ # handled like aliases, ratio name would need to be unique > ... ?
I think 3 is the most extensible. Perhaps use the syntax used in other places. We have these :u suffixes etc. Perhaps have :r or :R or whatever.
Given the other comments, we might want to avoid right away "ratio". If the mechanism is generalized it could be used to express "counter1 - counter2" for events which cannot be expressed with a single counter but are not really ratios.
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