[SYMBIOSYS][FEATURE] Mercury PVAR integration to tease out fine-grained event contribution to RPC runtime
Note that this issue will require corresponding PVAR support in Mercury to implemented as a prerequisite.
- Mercury PVARs are needed to “fill in the gaps” in instrumentation.
- Export necessary PVARs from Mercury.
- Initialize PVAR session in Margo.
- Sample PVARs at “appropriate” location:
- PVAR data either gets added to breadcrumb profile and/or trace event. @carns