Re: [OMPI devel] malloc(0) warnings

2010-05-06 Thread Edgar Gabriel
I'll look into it in the next couple of days. Thanks Edgar George Bosilca wrote: > This is an artifact of using the gatherv (or the scatterv) on an > inter-communicator without any useful data (i.e. either count of zero or > empty datatypes). Looks more like a synchronization than a real operati

Re: [OMPI devel] malloc(0) warnings

2010-05-06 Thread George Bosilca
This is an artifact of using the gatherv (or the scatterv) on an inter-communicator without any useful data (i.e. either count of zero or empty datatypes). Looks more like a synchronization than a real operation. george. On May 5, 2010, at 20:17 , Lisandro Dalcin wrote: > After building 1.4

Re: [OMPI devel] malloc(0) warnings

2010-05-06 Thread Jeff Squyres
Thanks for the report -- I've filed https://svn.open-mpi.org/trac/ompi/ticket/2405. On May 5, 2010, at 8:17 PM, Lisandro Dalcin wrote: > After building 1.4.2 with debug flags to configure, I get this (I've > got these warnings in previous releases, too): > > malloc debug: Request for 0 bytes (c