No, it's because the CM PML was never designed to be used in a
heterogeneous environment :). While the MX BTL does support
heterogeneous operations (at one point, I believe I even had it
working), none of the MTLs have ever been tested in heterogeneous
environments and it's known the datatype usage in the CM PML won't
support heterogeneous operation.
Brian
On Oct 24, 2007, at 6:21 PM, Jeff Squyres wrote:
George / Patrick / Rich / Christian --
Any idea why that's there? Is that because portals, MX, and PSM all
require homogeneous environments?
On Oct 18, 2007, at 3:59 PM, Sajjad Tabib wrote:
Hi,
I am tried to run an MPI program in a heterogeneous environment
using the pml cm component. However, open mpi returned with an
error message indicating that PML add procs returned "Not
supported". I dived into the cm code to see what was wrong and I
came upon the code below, which basically shows that if the
processes are running on different architectures, then return "not
supported". Now, I'm wondering whether my interpretation is correct
or not. Is it true that the cm component does not support a
heterogeneous environment? If so, will the developers support this
in the future? How could I get around this while still using the cm
component? What will happen if I rebuilt openmpi without these
statements?
I would appreciate your help.
Code:
mca_pml_cm_add_procs(....){
#if OMPI_ENABLE_HETEROGENEOUS_SUPPORT
107 for (i = 0 ; i < nprocs ; ++i) {
108 if (procs[i]->proc_arch != ompi_proc_local()-
>proc_arch) {
109 return OMPI_ERR_NOT_SUPPORTED;
110 }
111 }
112 #endif
.
.
.
}
Sajjad Tabib
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Jeff Squyres
Cisco Systems
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