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xprof: default sync daemon to fs to work around MPI sync bug #509

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Merged
TApplencourt merged 1 commit into from
Jun 19, 2026
+5 −9
Merged

xprof: default sync daemon to fs to work around MPI sync bug #509

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14 changes: 5 additions & 9 deletions xprof/xprof.rb.in
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Original file line number Diff line number Diff line change
Expand Up @@ -437,20 +437,16 @@ class SyncDaemon
end

SYNC_DAEMON_MPI_PATH
when 'fs'
when 'fs', nil
# FS is the default (daemon_type nil): it avoids the current
# MPI sync-daemon bug. The MPI daemon is still available
# explicitly via THAPI_SYNC_DAEMON=mpi.
SYNC_DAEMON_FS_PATH
when nil
if File.exist?(SYNC_DAEMON_MPI_PATH)
SYNC_DAEMON_MPI_PATH
else
LOGGER.warn("No #{SYNC_DAEMON_MPI_PATH} binary. Fallback to #{SYNC_DAEMON_FS_PATH}")
SYNC_DAEMON_FS_PATH
end
else
raise "Error: THAPI_SYNC_DAEMON=#{daemon_type} is not supported. Allowed: [mpi,fs]"
end

spawn(daemon_path, log: "Initialize SyncDaemon #{daemon_type}")
spawn(daemon_path, log: "Initialize SyncDaemon #{daemon_type || 'fs (default)'}")
end

def local_barrier(name)
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