X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/ce6f208050e74d310159255dc8e5bf7d1b7d4b56..99149d9a7fb61c938c70478ae8196ec37876b17f:/doc/doxygen/options.doc?ds=sidebyside

diff --git a/doc/doxygen/options.doc b/doc/doxygen/options.doc
index 9f338589f3..ff8a7d3f4d 100644
--- a/doc/doxygen/options.doc
+++ b/doc/doxygen/options.doc
@@ -139,7 +139,8 @@ when using SimDag.
   - \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
 
@@ -198,16 +199,10 @@ the \b maxmin/precision item (default value: 0.00001). Changing it
 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
+\subsection options_concurrency_limit Concurrency limit
 
-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.
+The maximum number of variables in a system can be tuned through
+the \b maxmin/concurrency_limit item (default value: 100). Setting a higher value can lift some limitations, such as the number of concurrent processes running on a single host.
 
 \subsection options_model_network Configuring the Network model
 
@@ -851,6 +846,8 @@ This is the default value:
     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.