[PATCH] D115019: ThreadPool: grow the pool only as needed

[Benoit Jacob via Phabricator via llvm-commits]

Benoit created this revision.
Herald added subscribers: Chia-hungDuan, dexonsmith, rriddle, hiraditya.
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On my 96-core cloudtop 'machine', it seems unnecessary to always start
96 threads upfront... particularly as the ThreadPool is created even
with -mlir-disable-threading. Things like the resuling spew in GDB and
the obfuscated output of `(gdb) info threads` are my motivation here,
but it probably also doesn't hurt for at least some efficiency metrics to
avoid creating many threads upfront.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D115019

Files:
  llvm/include/llvm/Support/ThreadPool.h
  llvm/lib/Support/ThreadPool.cpp

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