Re: [OMPI devel] [EXTERNAL] Open MPI v4.0.1: Process is hanging inside MPI_Init() when debugged with TotalView

2019-11-12 Thread Larry Baker via devel
"allowing us to weakly synchronize two threads" concerns me if the synchronization is important or must be reliable. I do not understand how volatile alone provides reliable synchronization without a mechanism to order visible changes to memory. If the flag(s) in question are suppposed to

Re: [OMPI devel] 3.1.2: Datatype errors and segfault in MPI_Allgatherv

2018-11-01 Thread Larry Baker via devel
Things that read like they should be unsigned look suspicious to me: nbElems -909934592 count -1819869184 Larry Baker US Geological Survey 650-329-5608 ba...@usgs.gov > On Nov 1, 2018, at 10:34 PM, Ben Menadue wrote: > > Hi, > > I haven’t heard back from the user yet, but I just put this