EESSI · ocaisa · Jun 10, 2025 · Jun 10, 2025
diff --git a/.github/workflows/scripts/verify_eessi_environment.py b/.github/workflows/scripts/verify_eessi_environment.py
@@ -0,0 +1,75 @@
+import os
+
+import os
+import sys
+
+class EnvVarError(Exception):
+    """Custom exception for environment variable comparison errors."""
+    def __init__(self, message):
+        super().__init__(f"ENV VALIDATION ERROR: {message}")
+
+def get_env_vars(var1, var2):
+    val1 = os.environ.get(var1)
+    val2 = os.environ.get(var2)
+
+    if val1 is None:
+        raise EnvVarError(f"Missing environment variable: '{var1}'")
+    if val2 is None:
+        raise EnvVarError(f"Missing environment variable: '{var2}'")
+
+    return val1, val2
+
+def check_env_equals(var1, var2):
+    val1, val2 = get_env_vars(var1, var2)
+    if val1 != val2:
+        raise EnvVarError(f"'{var1}' must equal '{var2}':\n{var1}='{val1}'\n{var2}='{val2}'")
+
+def check_env_contains(var1, var2):
+    val1, val2 = get_env_vars(var1, var2)
+    if val2 not in val1:
+        raise EnvVarError(f"'{var1}' must contain '{var2}':\n{var1}='{val1}'\n{var2}='{val2}'")
+
+def check_env_endswith(var1, var2):
+    val1, val2 = get_env_vars(var1, var2)
+    if not val1.endswith(val2):
+        raise EnvVarError(f"'{var1}' must end with '{var2}':\n{var1}='{val1}'\n{var2}='{val2}'")
+
+if __name__ == "__main__":
+    try:
+        # accelerator stuff is not guaranteed to exist
+        expected_eessi_accel_arch = os.getenv("EESSI_ACCELERATOR_TARGET_OVERRIDE", default=None)
+
+        # Verify the software and accelerator targets are set correctly
+        if os.getenv("EESSI_SOFTWARE_SUBDIR_OVERRIDE", default=None):
+            check_env_equals("EESSI_SOFTWARE_SUBDIR_OVERRIDE", "EESSI_SOFTWARE_SUBDIR")
+        if expected_eessi_accel_arch:
+            # EESSI_ACCEL_SUBDIR is what is detected by archdetect (or respects EESSI_ACCELERATOR_TARGET_OVERRIDE)
+            check_env_equals("EESSI_ACCELERATOR_TARGET_OVERRIDE", "EESSI_ACCEL_SUBDIR")
+            # special case is where EESSI_ACCELERATOR_TARGET_OVERRIDE may not match the final
+            # accelerator architecture chosen (in CI we deliberately choose a non-existent CUDA
+            # compute cabability for one case)
+            os.environ["EESSI_FINAL_CC"] = expected_eessi_accel_arch[:-1] + "0"
+            check_env_equals("EESSI_ACCELERATOR_TARGET", "EESSI_FINAL_CC")
+        # verify the software paths that should exist
+        check_env_endswith("EESSI_SOFTWARE_PATH", "EESSI_SOFTWARE_SUBDIR")
+        check_env_endswith("EESSI_SITE_SOFTWARE_PATH", "EESSI_SOFTWARE_SUBDIR")
+        # verify the module paths that should exist
+        check_env_contains("EESSI_MODULEPATH", "EESSI_SOFTWARE_SUBDIR")
+        check_env_contains("EESSI_SITE_MODULEPATH", "EESSI_SOFTWARE_SUBDIR")
+        if expected_eessi_accel_arch:
+            check_env_contains("EESSI_MODULEPATH_ACCEL", "EESSI_SOFTWARE_SUBDIR")
+            check_env_contains("EESSI_SITE_MODULEPATH_ACCEL", "EESSI_SOFTWARE_SUBDIR")  
+            check_env_contains("EESSI_MODULEPATH_ACCEL", "EESSI_ACCELERATOR_TARGET")
+            check_env_contains("EESSI_SITE_MODULEPATH_ACCEL", "EESSI_ACCELERATOR_TARGET")
+        # Finally, verify that all the expected module path are included
+        check_env_contains("MODULEPATH", "EESSI_MODULEPATH")
+        check_env_contains("MODULEPATH", "EESSI_SITE_MODULEPATH")
+        if expected_eessi_accel_arch:
+            check_env_contains("MODULEPATH", "EESSI_MODULEPATH_ACCEL")
+            check_env_contains("MODULEPATH", "EESSI_SITE_MODULEPATH_ACCEL")
+
+        # We are done
+        print("Environment variable check passed.")
+    except EnvVarError as e:
+        print(str(e), file=sys.stderr)
+        sys.exit(1)
diff --git a/.github/workflows/tests_eessi_module.yml b/.github/workflows/tests_eessi_module.yml
@@ -73,7 +73,9 @@ jobs:
           - x86_64/amd/zen3
           - x86_64/amd/zen4
         EESSI_ACCELERATOR_TARGET_OVERRIDE:
-          - accel/nvidia/cc80        
+          - accel/nvidia/cc80
+          # This should fall back to cc70
+          - accel/nvidia/cc77        
     steps:
       - name: Check out software-layer repository
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
@@ -102,21 +104,26 @@ jobs:
           # Turn on debug output in case we want to take a look
           export EESSI_DEBUG_INIT=true
           CPU_ARCH=$(./init/eessi_archdetect.sh -a cpupath)
-          export EESSI_ARCHDETECT_OPTIONS_OVERRIDE="dummy/cpu:${CPU_ARCH}:dummy1/cpu1"          
           module load EESSI/${{matrix.EESSI_VERSION}}
-          # EESSI_ARCHDETECT_OPTIONS_OVERRIDE/EESSI_DEBUG_INIT only relevant for Lmod init
-          unset EESSI_ARCHDETECT_OPTIONS_OVERRIDE
+          # EESSI_DEBUG_INIT/EESSI_ARCHDETECT_OPTIONS only relevant for Lmod init
           unset EESSI_DEBUG_INIT
           # Store all relevant environment variables
-          env | grep -E '(^EESSI_|^LMOD_RC|^LMOD_PACKAGE_PATH)' | sort > "${moduleoutfile}"
+          env | grep -E '(^EESSI_|^LMOD_RC|^LMOD_PACKAGE_PATH|^MODULEPATH)' | grep -v EESSI_ARCHDETECT_OPTIONS | sort > "${moduleoutfile}"
           module unload EESSI/${{matrix.EESSI_VERSION}}
 
+          # We should only have two EESSI_* variables defined (which set the overrides)
+          if [ "$(env | grep -c '^EESSI')" -ne 2 ]; then
+          echo "Expected 2 EESSI-related environment variables, but found a different number."
+          env | grep '^EESSI'
+          exit 1
+          fi
+
           # Now do the init script initialisation
           source ./init/bash
           # source script version sets environment variables to force archdetect, ignore these
           unset EESSI_USE_ARCHSPEC
           unset EESSI_USE_ARCHDETECT
-          env | grep -E '(^EESSI_|^LMOD_RC|^LMOD_PACKAGE_PATH)' | sort > "${sourceoutfile}"
+          env | grep -E '(^EESSI_|^LMOD_RC|^LMOD_PACKAGE_PATH|^MODULEPATH)' | sort > "${sourceoutfile}"
 
           # Now compare the two results
           echo ""
@@ -149,6 +156,8 @@ jobs:
         EESSI_ACCELERATOR_TARGET_OVERRIDE:
           - none
           - accel/nvidia/cc80
+          # This should fall back to cc70
+          - accel/nvidia/cc77
     steps:
       - name: Check out software-layer repository
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
@@ -181,7 +190,7 @@ jobs:
           initial_env_file="initial_env.txt"
           module_cycled_file="load_unload_cycle.txt"
 
-          # prepare Lmod, resetting it in a roundabout given we don't want defaults set
+          # prepare Lmod, resetting it in a roundabout way given we don't want defaults set
           export MODULEPATH=init/modules:.github/workflows/modules
           module load fake_module
           module purge
@@ -205,3 +214,9 @@ jobs:
               diff --unified=0 "${initial_env_file}" "${module_cycled_file}" 
               exit 1
           fi
+
+          module load EESSI/${{matrix.EESSI_VERSION}}
+          # Make sure our CPU and GPU architectures are what we expect
+          # (script uses EESSI_SOFTWARE_SUBDIR_OVERRIDE and EESSI_ACCELERATOR_TARGET_OVERRIDE
+          # as the starting point for the comparison)
+          python .github/workflows/scripts/verify_eessi_environment.py
diff --git a/init/bash b/init/bash
@@ -26,12 +26,18 @@ if [ $? -eq 0 ]; then
     # prepend location of modules for EESSI software stack to $MODULEPATH
     show_msg "Prepending $EESSI_MODULEPATH to \$MODULEPATH..."
     module use $EESSI_MODULEPATH
+
+    if [ ! -z ${EESSI_MODULEPATH_ACCEL} ]; then
+        show_msg "Prepending $EESSI_MODULEPATH_ACCEL to \$MODULEPATH..."
+        module use $EESSI_MODULEPATH_ACCEL
+    fi
+
     show_msg "Prepending site path $EESSI_SITE_MODULEPATH to \$MODULEPATH..."
     module use $EESSI_SITE_MODULEPATH
 
     if [ ! -z ${EESSI_MODULEPATH_ACCEL} ]; then
-        show_msg "Prepending $EESSI_MODULEPATH_ACCEL to \$MODULEPATH..."
-        module use $EESSI_MODULEPATH_ACCEL
+        show_msg "Prepending $EESSI_SITE_MODULEPATH_ACCEL to \$MODULEPATH..."
+        module use $EESSI_SITE_MODULEPATH_ACCEL
     fi
 
     #show_msg ""

diff --git a/init/eessi_environment_variables b/init/eessi_environment_variables
@@ -67,10 +67,18 @@ if [ -d $EESSI_PREFIX ]; then
               EESSI_ACCEL_SOFTWARE_SUBDIR=${EESSI_ACCEL_SOFTWARE_SUBDIR_OVERRIDE:-$EESSI_SOFTWARE_SUBDIR}
               # path to where accel/* subdirectory is located
               EESSI_ACCEL_SOFTWARE_PATH=${EESSI_PREFIX}/software/${EESSI_OS_TYPE}/${EESSI_ACCEL_SOFTWARE_SUBDIR}
-              if [ -d $EESSI_ACCEL_SOFTWARE_PATH/${EESSI_ACCEL_SUBDIR} ]; then
-                  show_msg "archdetect found supported accelerator for CPU target ${EESSI_ACCEL_SOFTWARE_SUBDIR}: ${EESSI_ACCEL_SUBDIR}"
+              if [ ! -d $EESSI_ACCEL_SOFTWARE_PATH/${EESSI_ACCEL_SUBDIR} ]; then
+                  # We should try to use the fallback compute capability
+                  EESSI_ACCELERATOR_TARGET="${EESSI_ACCEL_SUBDIR::-1}0"
+                  show_msg "archdetect found no supported accelerator ${EESSI_ACCEL_SUBDIR}, falling back to ${EESSI_ACCELERATOR_TARGET}"
               else
-                  show_msg "No matching path found in ${EESSI_ACCEL_SOFTWARE_SUBDIR} for accelerator detected by archdetect (${EESSI_ACCEL_SUBDIR})"
+                  EESSI_ACCELERATOR_TARGET="${EESSI_ACCEL_SUBDIR}"
+              fi
+              if [ -d $EESSI_ACCEL_SOFTWARE_PATH/${EESSI_ACCELERATOR_TARGET} ]; then
+                  show_msg "archdetect found supported accelerator for CPU target ${EESSI_ACCEL_SOFTWARE_SUBDIR}: ${EESSI_ACCELERATOR_TARGET}"
+                  export EESSI_ACCELERATOR_TARGET
+              else
+                  show_msg "No matching path found in ${EESSI_ACCEL_SOFTWARE_SUBDIR} for accelerator detected by archdetect (${EESSI_ACCELERATOR_TARGET})"
               fi
           fi
       else
@@ -95,6 +103,7 @@ if [ -d $EESSI_PREFIX ]; then
         lmod_rc_file="$LMOD_CONFIG_DIR/lmodrc.lua"
         if [ -f $lmod_rc_file ]; then
           show_msg "Found Lmod configuration file at $lmod_rc_file"
+          export LMOD_RC="$lmod_rc_file"
         else
           error "Lmod configuration file not found at $lmod_rc_file"
         fi
@@ -112,6 +121,8 @@ if [ -d $EESSI_PREFIX ]; then
         elif [ -d $EESSI_SOFTWARE_PATH ]; then
           export EESSI_SITE_SOFTWARE_PATH=${EESSI_SOFTWARE_PATH/versions/host_injections}
           show_msg "Using ${EESSI_SITE_SOFTWARE_PATH} as the site extension directory for installations."
+          EESSI_SITE_ACCEL_SOFTWARE_PATH=${EESSI_ACCEL_SOFTWARE_PATH/versions/host_injections}
+          show_msg "Using ${EESSI_SITE_ACCEL_SOFTWARE_PATH} as the site extension directory for accelerated installations."
           # Allow for use of alternative module tree shipped with EESSI
           if [ -z ${EESSI_MODULE_SUBDIR+x} ]; then
             # EESSI_MODULE_SUBDIR not set
@@ -137,9 +148,11 @@ if [ -d $EESSI_PREFIX ]; then
             false
           fi
 
-          if [ -d ${EESSI_ACCEL_SOFTWARE_PATH}/${EESSI_ACCEL_SUBDIR}/${EESSI_MODULE_SUBDIR} ]; then
-              export EESSI_MODULEPATH_ACCEL=${EESSI_ACCEL_SOFTWARE_PATH}/${EESSI_ACCEL_SUBDIR}/${EESSI_MODULE_SUBDIR}
+          if [ -d ${EESSI_ACCEL_SOFTWARE_PATH}/${EESSI_ACCELERATOR_TARGET}/${EESSI_MODULE_SUBDIR} ]; then
+              export EESSI_MODULEPATH_ACCEL=${EESSI_ACCEL_SOFTWARE_PATH}/${EESSI_ACCELERATOR_TARGET}/${EESSI_MODULE_SUBDIR}
               show_msg "Using ${EESSI_MODULEPATH_ACCEL} as additional directory (for accelerators) to be added to MODULEPATH."
+              export EESSI_SITE_MODULEPATH_ACCEL=${EESSI_SITE_ACCEL_SOFTWARE_PATH}/${EESSI_ACCELERATOR_TARGET}/${EESSI_MODULE_SUBDIR}
+              show_msg "Using ${EESSI_SITE_MODULEPATH_ACCEL} as additional site extension directory (for accelerators) to be added to MODULEPATH."
           fi
 
           # Fix wrong path for RHEL >=8 libcurl 

diff --git a/init/modules/EESSI/2023.06.lua b/init/modules/EESSI/2023.06.lua
@@ -63,11 +63,14 @@ function archdetect_accel()
     local script = pathJoin(eessi_prefix, 'init', 'lmod_eessi_archdetect_wrapper_accel.sh')
     -- for unload mode, we need to grab the value before it is unset
     local archdetect_accel = os.getenv("EESSI_ACCEL_SUBDIR") or (os.getenv("EESSI_ACCELERATOR_TARGET_OVERRIDE") or "")
-    if not os.getenv("EESSI_ACCELERATOR_TARGET_OVERRIDE ") then
+    if not os.getenv("EESSI_ACCELERATOR_TARGET_OVERRIDE") then
         if convertToCanonical(LmodVersion()) < convertToCanonical("8.6") then
             LmodError("Loading this modulefile requires using Lmod version >= 8.6, but you can export EESSI_ACCELERATOR_TARGET_OVERRIDE to the available accelerator architecture in the form of: accel/nvidia/cc80")
         end
+        -- this script sets EESSI_ACCEL_SUBDIR
         source_sh("bash", script)
+    else
+        setenv("EESSI_ACCEL_SUBDIR", os.getenv("EESSI_ACCELERATOR_TARGET_OVERRIDE"))
     end
     archdetect_accel = os.getenv("EESSI_ACCEL_SUBDIR") or archdetect_accel
     eessiDebug("Got archdetect accel option: " .. archdetect_accel)
@@ -140,16 +143,33 @@ if not (archdetect_accel == nil or archdetect_accel == '') then
     -- /cvmfs/software.eessi.io/versions/2023.06/software/linux/x86_64/amd/zen3/accel/nvidia/cc80/modules/all
     eessi_module_path_accel = pathJoin(eessi_accel_software_path, archdetect_accel, eessi_modules_subdir)
     eessiDebug("Checking if " .. eessi_module_path_accel .. " exists")
+    if not isDir(eessi_module_path_accel) then
+        -- fall back to major version GPU arch if the exact one is not an option (i.e, 7.5 -> 7.0)
+        local original_archdetect_accel = archdetect_accel
+        archdetect_accel =  archdetect_accel:sub(1,-2) .. "0"
+        eessiDebug("No directory for " .. original_archdetect_accel .. ", trying " .. archdetect_accel)
+        eessi_module_path_accel = pathJoin(eessi_accel_software_path, archdetect_accel, eessi_modules_subdir)
+    end
     if isDir(eessi_module_path_accel) then
+        -- set the accelerator target based on what actually exists
+        setenv("EESSI_ACCELERATOR_TARGET", archdetect_accel)
         setenv("EESSI_MODULEPATH_ACCEL", eessi_module_path_accel)
-        prepend_path("MODULEPATH", eessi_module_path_accel)
-        eessiDebug("Using acclerator modules at: " .. eessi_module_path_accel)
+        if ( mode() ~= "spider" ) then
+            prepend_path("MODULEPATH", eessi_module_path_accel)
+            eessiDebug("Using accelerator modules at: " .. eessi_module_path_accel)
+        end
     end
 end
 
 -- prepend the site module path last so it has priority
 prepend_path("MODULEPATH", eessi_site_module_path)
 eessiDebug("Adding " .. eessi_site_module_path .. " to MODULEPATH")
+if isDir(eessi_module_path_accel) then
+    eessi_module_path_site_accel = string.gsub(eessi_module_path_accel, "versions", "host_injections")
+    setenv("EESSI_SITE_MODULEPATH_ACCEL", eessi_module_path_site_accel)
+    prepend_path("MODULEPATH", eessi_module_path_site_accel)
+    eessiDebug("Using site accelerator modules at: " .. eessi_module_path_site_accel)
+end
 if mode() == "load" then
     LmodMessage("EESSI/" .. eessi_version .. " loaded successfully")
 end