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diff --git a/docs/users_guide/runtime_control.xml b/docs/users_guide/runtime_control.xml
index 6a3a9e3..95365ba 100644
--- a/docs/users_guide/runtime_control.xml
+++ b/docs/users_guide/runtime_control.xml
@@ -85,6 +85,54 @@
+
+ Miscellaneous RTS options
+
+
+
+
+ RTS
+ option
+
+ Sets the interval that the RTS clock ticks at. The
+ runtime uses a single timer signal to count ticks; this timer
+ signal is used to control the context switch timer () and the heap profiling
+ timer . Also, the
+ time profiler uses the RTS timer signal directly to record
+ time profiling samples.
+
+ Normally, setting the option
+ directly is not necessary: the resolution of the RTS timer is
+ adjusted automatically if a short interval is requested with
+ the or options.
+ However, setting is required in order to
+ increase the resolution of the time profiler.
+
+ Using a value of zero disables the RTS clock
+ completetly, and has the effect of disabling timers that
+ depend on it: the context switch timer and the heap profiling
+ timer. Context switches will still happen, but
+ deterministically and at a rate much faster than normal.
+ Disabling the interval timer is useful for debugging, because
+ it eliminates a source of non-determinism at runtime.
+
+
+
+
+
+ RTS
+ option
+
+ If yes (the default), the RTS installs signal handlers to catch
+ things like ctrl-C. This option is primarily useful for when
+ you are using the Haskell code as a DLL, and want to set your
+ own signal handlers.
+
+
+
+
+
RTS options to control the garbage collector
@@ -402,7 +450,7 @@
The RTS options related to profiling are described in , those for concurrency in
- , and those for parallelism in
+ , and those for parallelism in
.