[PATCH] D75153: [ThinLTO] Allow usage of all SMT threads in the system

[Petr Hosek via Phabricator via cfe-commits]

phosek added a comment.
Herald added a reviewer: MaskRay.

We've started seeing `llvm-cov` on our Linux bots with this error:

  terminating with uncaught exception of type std::__2::system_error: thread constructor failed: Resource temporarily unavailable

Specifically, we're running `llvm export` which uses `heavyweight_hardware_concurrency` (we use the default number of threads, i.e. `0`): https://github.com/llvm/llvm-project/blob/master/llvm/tools/llvm-cov/CoverageExporterJson.cpp#L169

I'm not yet sure what's the problem, but bisecting is pointing at this change.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D75153/new/

https://reviews.llvm.org/D75153