- \b compound: Host model that is automatically chosen if
you change the network and CPU models
- \b ptask_L07: Host model somehow similar to Cas01+CM02 but
- allowing parallel tasks
+ allowing "parallel tasks", that are intended to model the moldable
+ tasks of the grid scheduling literature.
\subsection options_generic_plugin Plugins
may speedup the simulation by discarding very small actions, at the
price of a reduced numerical precision.
-\subsection options_model_nthreads Parallel threads for model updates
-
-By default, Surf computes the analytical models sequentially to share their
-resources and update their actions. It is possible to run them in parallel,
-using the \b surf/nthreads item (default value: 1). If you use a
-negative or null value, the amount of available cores is automatically
-detected and used instead.
-
-Depending on the workload of the models and their complexity, you may get a
-speedup or a slowdown because of the synchronization costs of threads.
-
\subsection options_model_network Configuring the Network model
\subsubsection options_model_network_gamma Maximal TCP window size
1. http://simgrid.gforge.inria.fr/contrib/smpi-calibration-doc.html
2. http://simgrid.gforge.inria.fr/contrib/smpi-saturation-doc.html
+\subsection options_smpi_papi_events smpi/papi-events: Trace hardware counters with PAPI
+
+\warning
+ This option is experimental and will be subject to change.
+ This feature currently requires superuser privileges, as registers are queried.
+ Only use this feature with code you trust! Call smpirun for instance via
+ smpirun -wrapper "sudo " <your-parameters>
+ or run sudo sh -c "echo 0 > /proc/sys/kernel/perf_event_paranoid"
+ In the later case, sudo will not be required.
+
+\note
+ This option is only available when SimGrid was compiled with PAPI support.
+
+This option takes the names of PAPI counters and adds their respective values
+to the trace files. (See Section \ref tracing_tracing_options.)
+
+It is planned to make this feature available on a per-process (or per-thread?) basis.
+The first draft, however, just implements a "global" (i.e., for all processes) set
+of counters, the "default" set.
+
+\verbatim
+--cfg=smpi/papi-events:"default:PAPI_L3_LDM:PAPI_L2_LDM"
+\endverbatim
+
\subsection options_smpi_global smpi/privatize-global-variables: Automatic privatization of global variables
MPI executables are meant to be executed in separated processes, but SMPI is
- \c smpi/ois: \ref options_model_smpi_ois
- \c smpi/or: \ref options_model_smpi_or
- \c smpi/os: \ref options_model_smpi_os
+- \c smpi/papi-events: \ref options_smpi_papi_events
- \c smpi/privatize-global-variables: \ref options_smpi_global
- \c smpi/running-power: \ref options_smpi_bench
- \c smpi/send-is-detached-thresh: \ref options_model_smpi_detached
