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add Lmod hook to set $OMPI_MCA_btl to ^smcuda when loading OpenMPI module to work around bug #473

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Merged
merged 1 commit into from
Feb 13, 2024
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add Lmod hook to set $OMPI_MCA_btl to ^smcuda when loading OpenMPI module to work around bug #473

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21 changes: 21 additions & 0 deletions create_lmodrc.py
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Original file line number Diff line number Diff line change
Expand Up @@ -94,7 +94,28 @@
end
end

local function openmpi_load_hook(t)
-- disable smcuda BTL when loading OpenMPI module for aarch64/neoverse_v1,
-- to work around hang/crash due to bug in OpenMPI;
-- see https://gitlab.com/eessi/support/-/issues/41
local frameStk = require("FrameStk"):singleton()
local mt = frameStk:mt()
local moduleName = string.match(t.modFullName, "(.-)/")
local cpuTarget = os.getenv("EESSI_SOFTWARE_SUBDIR") or ""
if (moduleName == "OpenMPI") and (cpuTarget == "aarch64/neoverse_v1") then
local msg = "Adding '^smcuda' to $OMPI_MCA_btl to work around bug in OpenMPI"
LmodMessage(msg .. " (see https://gitlab.com/eessi/support/-/issues/41)")
local ompiMcaBtl = os.getenv("OMPI_MCA_btl")
if ompiMcaBtl == nil then
setenv("OMPI_MCA_btl", "^smcuda")
else
setenv("OMPI_MCA_btl", ompiMcaBtl .. ",^smcuda")
end
end
end

hook.register("load", cuda_enabled_load_hook)
hook.register("load", openmpi_load_hook)
"""

def error(msg):
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