+\subsubsection faq_tracing_options Tracing configuration Options
+
+These are the options accepted by the tracing system of SimGrid:
+
+\li <b>\c
+tracing
+</b>:
+ It activates the tracing system and register the simulation platform
+ in the trace file. You have to enable this option to others take effect.
+
+\li <b>\c
+tracing/categorized
+</b>:
+ It activates the categorized resource utilization tracing. It should
+ be enabled if tracing categories are used by this simulator.
+
+\li <b>\c
+tracing/uncategorized
+</b>:
+ It activates the uncategorized resource utilization tracing. Use it if
+ this simulator do not use tracing categories and resource use have to be
+ traced.
+
+\li <b>\c
+tracing/platform/method
+</b>:
+ It changes the way resource utilization (categorized or not) is traced
+ inside the simulation core. Method 'a' (default) traces all updates defined
+ by the CPU/network model of a given resource. Depending on the interface used
+ by this simulator (MSG, SMPI, SimDAG), the default method can generate large
+ trace files. Method 'b' tries to make smaller tracefiles using clever updates,
+ without losing details of resource utilization. Method 'c' generates even
+ smaller files by doing time integration during the simulation, but it loses
+ precision. If this last method is used, the smallest timeslice used in the
+ tracefile analysis must be bigger than the smaller resource utilization. If
+ unsure, do not change this option.
+
+\li <b>\c
+tracing/filename
+</b>:
+ A file with this name will be created to register the simulation. The file
+ is in the Paje format and can be analyzed using Triva or Paje visualization
+ tools. More information can be found in these webpages:
+ <a href="http://triva.gforge.inria.fr/">http://triva.gforge.inria.fr/</a>
+ <a href="http://paje.sourceforge.net/">http://paje.sourceforge.net/</a>
+
+\li <b>\c
+tracing/smpi
+</b>:
+ This option only has effect if this simulator is SMPI-based. Traces the MPI
+ interface and generates a trace that can be analyzed using Gantt-like
+ visualizations. Every MPI function (implemented by SMPI) is transformed in a
+ state, and point-to-point communications can be analyzed with arrows.
+
+\li <b>\c
+tracing/smpi/group
+</b>:
+ This option only has effect if this simulator is SMPI-based. The processes
+ are grouped by the hosts where they were executed.
+
+\li <b>\c
+tracing/msg/task
+</b>:
+ This option only has effect if this simulator is MSG-based. It traces the
+ behavior of all categorized MSG tasks, grouping them by hosts.
+
+\li <b>\c
+tracing/msg/process
+</b>:
+ This option only has effect if this simulator is MSG-based. It traces the
+ behavior of all categorized MSG processes, grouping them by hosts. This option
+ can be used to track process location if this simulator has process migration.
+
+\li <b>\c
+tracing/msg/volume
+</b>:
+ This experimental option only has effect if this simulator is MSG-based.
+ It traces the communication volume of MSG send/receive.
+