mpich patch for shmem with > 1 myrinet board.

Hi,
	If you have 2 or more myrinet boards in an smp system and want to
use shared memory for local mpi communication, you will need the following
patch for mpich-1.2..3. 



diff -u ../clean/mpich-1.2..3/mpid/ch_gm/gm_smp.c mpid/ch_gm/gm_smp.c
--- ../clean/mpich-1.2..3/mpid/ch_gm/gm_smp.c	Thu Jun 29 13:20:42 2000
+++ mpid/ch_gm/gm_smp.c	Thu Aug 17 14:52:45 2000
@@ -8,6 +8,7 @@
 {
   MPID_Config * new_config = NULL;
   MPID_Config * return_config;
+  char *cp, *cq;
   int i, j;
 
   /* already configured ? */
@@ -19,8 +20,15 @@
 
   /* search the number of local processes */
   smpi.num_local_nodes = 0;
+  /* rip off :board specifier when doing comparisons to figure out smp-ness
+   * --pw
+   */
+  if ((cp = strrchr(gmpi.node_names[MPID_MyWorldRank], ':')))
+    *cp = 0;
   for (i=0; i < MPID_MyWorldSize; i++) {
     smpi.local_nodes[i] = -1;
+    if ((cq = strrchr(gmpi.node_names[i], ':')))
+      *cq = 0;
     if (strcmp(gmpi.node_names[i], gmpi.node_names[MPID_MyWorldRank]) == 0) {
       /* Same node name, me or another process ? */
       if (i == MPID_MyWorldRank)
@@ -28,7 +36,11 @@
       smpi.local_nodes[i] = smpi.num_local_nodes;
       smpi.num_local_nodes++;
     }
+    if (cq)
+      *cq = ':';
   }
+  if (cp)
+    *cp = ':';
   /* at least one local node : myself ! */ 
   gm_assert(smpi.num_local_nodes != 0);
   
diff -u ../clean/mpich-1.2..3/mpid/ch_gm/gmconf.c mpid/ch_gm/gmconf.c
--- ../clean/mpich-1.2..3/mpid/ch_gm/gmconf.c	Wed Mar 15 18:45:06 2000
+++ mpid/ch_gm/gmconf.c	Thu Aug 17 14:42:06 2000
@@ -214,8 +214,10 @@
 #endif
 
 	count = 0;
+	bzero(gmpi.node_names, GMPI_MAX_NUMNODES * sizeof(char *));
 	while (!feof(conffile_stream)) {
-		gmpi.node_names[count] = malloc(GM_MAX_HOST_NAME_LEN + 8);
+		if (!gmpi.node_names[count])
+		    gmpi.node_names[count] = malloc(GM_MAX_HOST_NAME_LEN + 8);
 		if (!gmpi.node_names[count]) {
 			fprintf(stderr, "couldn't allocate space for gmpi.node_names[%d]\n", count);
 			exit(1);

-- 
Doug Johnson
Systems Developer/Engineer
The Ohio Supercomputer Center
[email protected]