Amir Ayupov 04ebd1907c [MC][NFC] Statically allocate storage for decoded pseudo probes and function records ...

Use #102774 to allocate storage for decoded probes (`PseudoProbeVec`)
and function records (`InlineTreeVec`).

Leverage that to also shrink sizes of `MCDecodedPseudoProbe`:
- Drop Guid since it's accessible via `InlineTree`.

`MCDecodedPseudoProbeInlineTree`:
- Keep track of probes and inlinees using `ArrayRef`s now that probes
  and function records belonging to the same function are allocated
  contiguously.

This reduces peak RSS from 13.7 GiB to 9.7 GiB and pseudo probe parsing
time (as part of perf2bolt) from 15.3s to 9.6s for a large binary with
400MiB .pseudo_probe section containing 43M probes and 25M function
records.

Depends on:
#102774
#102787
#102788

Reviewers: maksfb, rafaelauler, dcci, ayermolo, wlei-llvm

Reviewed By: wlei-llvm

Pull Request: https://github.com/llvm/llvm-project/pull/102789

2024-08-26 09:09:13 -07:00

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