From 4ec4df21a0ee49a748d263f872e1c1b4d45e65c7 Mon Sep 17 00:00:00 2001
From: Ralph Castain <rhc@pmix.org>
Date: Tue, 29 Oct 2024 06:34:10 -0600
Subject: [PATCH] Fix support for hetero LSF environments

Don't assume that all nodes share the same topology
as the HNP - it is an unnecessary restriction since
we know the actual topology of each node.

Signed-off-by: Ralph Castain <rhc@pmix.org>
---
 .../show-help-files/help-rmaps_rank_file.txt  |  6 +++
 src/mca/rmaps/rank_file/rmaps_rank_file.c     | 54 +++++++++++++++++--
 2 files changed, 55 insertions(+), 5 deletions(-)

diff --git a/src/docs/show-help-files/help-rmaps_rank_file.txt b/src/docs/show-help-files/help-rmaps_rank_file.txt
index 0f99de1900..210a5547ec 100644
--- a/src/docs/show-help-files/help-rmaps_rank_file.txt
+++ b/src/docs/show-help-files/help-rmaps_rank_file.txt
@@ -102,3 +102,9 @@ to a different process.
 If this is intentional then you must pass the "overload-allowed"
 qualifier to the --bind-to option.
   --bind-to :overload-allowed
+#
+[resource-not-found]
+The specified LSF affinity file contained a node (%s) that is not in your
+allocation. We therefore cannot map a process rank to it. Please
+check your allocation and affinity file to ensure the latter only
+contains allocated nodes.
diff --git a/src/mca/rmaps/rank_file/rmaps_rank_file.c b/src/mca/rmaps/rank_file/rmaps_rank_file.c
index d1a2401a41..acaf73aaa6 100644
--- a/src/mca/rmaps/rank_file/rmaps_rank_file.c
+++ b/src/mca/rmaps/rank_file/rmaps_rank_file.c
@@ -756,6 +756,28 @@ static int prte_rmaps_rf_process_lsf_affinity_hostfile(prte_job_t *jdata,
     return PRTE_SUCCESS;
 }
 
+static bool quickmatch(prte_node_t *nd, char *name)
+{
+    int n;
+
+    if (0 == strcmp(nd->name, name)) {
+        return true;
+    }
+    if (0 == strcmp(nd->name, prte_process_info.nodename) &&
+        (0 == strcmp(name, "localhost") ||
+         0 == strcmp(name, "127.0.0.1"))) {
+        return true;
+    }
+    if (NULL != nd->aliases) {
+        for (n=0; NULL != nd->aliases[n]; n++) {
+            if (0 == strcmp(nd->aliases[n], name)) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
 static int prte_rmaps_rf_lsf_convert_affinity_to_rankfile(char *affinity_file, char **aff_rankfile)
 {
     FILE *fp;
@@ -765,9 +787,9 @@ static int prte_rmaps_rf_lsf_convert_affinity_to_rankfile(char *affinity_file, c
     char *tmp_str = NULL;
     size_t len;
     char **cpus;
-    int i;
+    int i, j;
     hwloc_obj_t obj;
-    prte_topology_t *my_topo = NULL;
+    prte_node_t *node, *nptr;
 
     if( NULL != *aff_rankfile) {
         free(*aff_rankfile);
@@ -835,11 +857,33 @@ static int prte_rmaps_rf_lsf_convert_affinity_to_rankfile(char *affinity_file, c
         // Convert the Physical CPU set from LSF to a Hwloc logical CPU set
         pmix_output_verbose(20, prte_rmaps_base_framework.framework_output,
                             "mca:rmaps:rf: (lsf) Convert Physical CPUSET from <%s>", sep);
-        my_topo = (prte_topology_t *) pmix_pointer_array_get_item(prte_node_topologies, 0);
+
+        // find the named host
+        nptr = NULL;
+        for (j = 0; j < prte_node_pool->size; j++) {
+            node = (prte_node_t *) pmix_pointer_array_get_item(prte_node_pool, j);
+            if (NULL == node) {
+                continue;
+            }
+            if (quickmatch(node, hstname)) {
+                nptr = node;
+                break;
+            }
+        }
+        if (NULL == nptr) {
+            /* wasn't found - that is an error */
+            pmix_show_help("help-rmaps_rank_file.txt",
+                           "resource-not-found", true,
+                           hstname);
+            fclose(fp);
+            close(fp_rank);
+            return PRTE_ERROR;
+        }
+
         cpus = PMIX_ARGV_SPLIT_COMPAT(sep, ',');
         for(i = 0; NULL != cpus[i]; ++i) {
-            // assume HNP has the same topology as other nodes
-            obj = hwloc_get_pu_obj_by_os_index(my_topo->topo, strtol(cpus[i], NULL, 10)) ;
+            // get the specified object
+            obj = hwloc_get_pu_obj_by_os_index(nptr->topology->topo, strtol(cpus[i], NULL, 10)) ;
             if (NULL == obj) {
                 PMIX_ARGV_FREE_COMPAT(cpus);
                 fclose(fp);