@@ -78,6 +78,19 @@
7878-- This is checked for /any/ non-empty value. If set, all internal traces are
7979-- written to the GHC eventlog.
8080--
81+-- By default, the built in tracers will ignore all trace events! In order to
82+-- enable tracing the incoming 'MxEvent' stream, the @DISTRIBUTED_PROCESS_TRACE_FLAGS@
83+-- environment variable accepts the following flags, which enable tracing specific
84+-- event types:
85+--
86+-- p = trace the spawning of new processes
87+-- d = trace the death of processes
88+-- n = trace registration of names (i.e., named processes)
89+-- u = trace un-registration of names (i.e., named processes)
90+-- s = trace the sending of messages to other processes
91+-- r = trace the receipt of messages from other processes
92+-- l = trace node up/down events
93+--
8194-- Users of the /simplelocalnet/ Cloud Haskell backend should also note that
8295-- because the trace file option only supports trace output from a single node
8396-- (so as to avoid interleaving), a file trace configured for the master node