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Fix rank sometime not traced (LTTNG_UST_REGISTER_TIMEOUT) #508

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Merged
TApplencourt merged 1 commit into from
Jun 19, 2026
+6 −1
Merged

Fix rank sometime not traced (LTTNG_UST_REGISTER_TIMEOUT) #508

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7 changes: 6 additions & 1 deletion xprof/xprof.rb.in
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Original file line number Diff line number Diff line change
Expand Up @@ -917,9 +917,14 @@ def all_env_tracers(usr_binary)
h["LTTNG_UST_#{name.upcase}_PROFILE"] = 1 if OPTIONS[:profile]
h["LTTNG_UST_#{name.upcase}_VERBOSE"] = 1 if LOGGER.level <= Logger::DEBUG
end
# Only support blocking.
# Only support blocking, so lttng doesn't drop messages
h['LTTNG_UST_ALLOW_BLOCKING'] = 1

# Each tracee rank tries to register simultaneously.
# With the default (3s) timeout, ranks that lose the registration race give up
# and run untraced. Block until registration completes instead.
h['LTTNG_UST_REGISTER_TIMEOUT'] = -1

# Customization
if OPTIONS[:'backend-names'].include?('ze')
h['LTTNG_UST_ZE_PARANOID_DRIFT'] = 1 if OPTIONS[:profile]
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