[Openmp-commits] [PATCH] D112861: [OpenMP][DeviceRTL] Fixed an issue that causes hang in SU3

Ye Luo via Phabricator via Openmp-commits openmp-commits at lists.llvm.org
Sat Oct 30 13:25:07 PDT 2021

ye-luo added inline comments.

Comment at: openmp/libomptarget/DeviceRTL/src/Parallelism.cpp:129
+    // __kmpc_target_deinit may not hold.
+    synchronize::threadsAligned();
ye-luo wrote:
> tianshilei1992 wrote:
> > ye-luo wrote:
> > > This explanation seems plausible. Are the synchronization requirement of ASSERT and why being documented somewhere?
> > Have no idea.
> synchronize::threadsAligned() has been called at the end of above scope.
> What caused the out of  sync and needs this additional call?
> Why ASSERT requires synchronization.
> All needs explanation or documentation.
> "Synchronize all threads to make sure every thread exits the scope above;"
> Just sounds plausible
Making code slower by the addtional synchronization can also potentially skip triggering the hang. So it needs to be well understood and explained.

  rG LLVM Github Monorepo



More information about the Openmp-commits mailing list