parser update

[lttv.git] / ltt / branches / poly / doc / developer / lttng-userspace-tracing.txt

diff --git a/ltt/branches/poly/doc/developer/lttng-userspace-tracing.txt b/ltt/branches/poly/doc/developer/lttng-userspace-tracing.txt
index beb56cac516239b2583a7c649ffffe1b6d701a6a..bf58790772f67a2bff7300ee251a984659ce3867 100644 (file)
--- a/ltt/branches/poly/doc/developer/lttng-userspace-tracing.txt
+++ b/ltt/branches/poly/doc/developer/lttng-userspace-tracing.txt
@@ -219,10 +219,17 @@ SIGRTMIN+3
 (like hardware fault and expiring timer : to the thread, see p. 413 of Advances
 prog. in the UNIX env.)
 
+Signal is sent on tracing create/destroy, start/stop and filter change.
+
 Will update for itself only : it will remove unnecessary concurrency.
 
 
 
+Notes :
+
+It doesn't matter "when" the process receives the update signal after a trace
+start : it will receive it in priority, before executing anything else when it
+will be scheduled in.