[PATCH] D15057: [PGO] Enable common VP format in profile runtime

[David Li via llvm-commits]

davidxl updated this revision to Diff 41788.
davidxl added a comment.

Update the patch:

1. instead of pre-allocate RuntimeRecord which wastes heap space, we now just precomputes the base buffer size
2. an environment variable is introduced to allow user to allocate no default extra bytes to accommodate the case when  concurrent profile update form other threads causes profile data to be dropped (due to to capacity limit)
3. verbose messages are added to diagnose various error conditions.

Patch to completely remove data races on Values field will follow.


http://reviews.llvm.org/D15057

Files:
  lib/profile/InstrProfiling.c
  test/profile/instrprof-value-prof.c

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