[PATCH] D136701: [LinkerWrapper] Perform device linking steps in parallel

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl added a comment.

In general, I think parallelizing the linking workload for multiple GPU's in the linker wrapper is a useful feature. I am not sure whether the workload to be parallelized includes the LLVM passes and codegen, which is usually the bottleneck. Parallelizing this workload when there are many GPU arch's can significantly improve build time.

It is preferable if the parallelization can be coordinated with GNU make through the job server provided by GNU make (https://www.gnu.org/software/make/manual/html_node/Job-Slots.html#Job-Slots). However, some efforts are needed to implement that.

For now, I think an option to enable parallelization (by default off) should be fine.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D136701/new/

https://reviews.llvm.org/D136701