opreport and multiple counter

[Philippe E. <ph...@wa...>]

actually the output is:

$ opreport -l

vma      samples  %   samples  %     app name  symbol name
0804a5e0 103306 16.8419 529 14.6133  oprofiled opd_put_sample
0804cb00 42776   6.9737 345  9.5304  oprofiled odb_insert

we need to add optionnally a field to provide metrics
comparison. like:

vma      samples  %   samples  %      %1 - %2   app name  symbol name
0804a5e0 103306 16.8419 529 14.6133  (+2.2286)  oprofiled opd_put_sample
0804cb00 42776   6.9737 345  9.5304  (-2.5567)  oprofiled odb_insert

here the metrics is %1 - %0 where %x is the counter number
(numbered from left to right). The above example is for two
counter but should works for any number of counter. This is
for opreport but a similar interface would be used for opdiff.

So I think we need a --compare flags to add this field, a
--metrics= to allow specifying the metrics (with a default
metrics we must choose) and a --sort to change sort order.


--compare  no parameters, when specified add a field for all
counter expect the counter at left in output

--metrics="%N / %0"

I've already code to implement that, but only a vague
idea if it's usefull and how we must specify the user
interface


Graydon, you worked on something similar through script,
any comments ?  Especially what do we need to avoid you
update your python bindings each time an internal
structure of oprofile change ?


regards,
Phil