Thanks a lot for your help! I will give it a try. Christoph
Ralph Castain schrieb: > You've got this a tad wrong, but that's okay - let me try to clarify a couple > of things that may help. > > First, you don't want to add this as a separate orted command. As you noted, > orte has no direct way to tell the OMPI layer to do anything. Instead, you > want to pass a message to the process that is received in the OMPI layer. > That is easy to do. > > 1. add a message tag in ompi/mca/dpm/dpm.h - perhaps something like > OMPI_RML_TAG_BTL_CTL > > 2. in the btl, add a call to orte_rml.recv_nb() that identifies the above tag > and specifies a callback function to use when such a message arrives > > 3. in that callback function, toggle your "paused" flag - or you can unpack > the buffer to get a flag telling you what value to set. Your choice. > > Now, when you want to pause the BTL, you do an orte_grpcomm.xcast() to the > above message tag. ORTE will deliver that message to every process, which > will then have its callback function called. > > HTH > Ralph -- Paderborn Center for Parallel Computing - PC2 University of Paderborn - Germany http://www.pc2.de Christoph Konersmann <[email protected]>
