X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/988f1ee585120cbb07d93e446917648488a76e36..3588494159eef67d73199ee1035347b5e78b2cfb:/doc/doxygen/options.doc?ds=sidebyside

diff --git a/doc/doxygen/options.doc b/doc/doxygen/options.doc
index edb44a13cd..1e39adae97 100644
--- a/doc/doxygen/options.doc
+++ b/doc/doxygen/options.doc
@@ -518,6 +518,21 @@ second) under which the execution chunks are not reported to the
 simulation kernel (default value: 1e-6). Please note that in some
 circonstances, this optimization can hinder the simulation accuracy.
 
+ In some cases, however, one may wish to disable simulation of
+application computation. This is the case when SMPI is used not to
+simulate an MPI applications, but instead an MPI code that performs
+"live replay" of another MPI app (e.g., ScalaTrace's replay tool,
+various on-line simulators that run an app at scale). In this case the
+computation of the replay/simulation logic should not be simulated by
+SMPI. Instead, the replay tool or on-line simulator will issue
+"computation events", which correspond to the actual MPI simulation
+being replayed/simulated. At the moment, these computation events can
+be simulated using SMPI by calling internal smpi_execute*() functions.
+
+To disable the benchmarking/simulation of computation in the simulated
+application via this runtime automatic switching, the variable \b
+smpi/privatize_global_variables should be set to no
+
 \subsection options_smpi_timing Reporting simulation time
 
 Most of the time, you run MPI code through SMPI to compute the time it
@@ -555,7 +570,7 @@ To avoid this, several options are possible :
   linking is advised (but not with the simgrid library, to avoid replicating 
   its own global variables). 
 
-  To use this runtime automatic switching, the variable \b smpi/privatize_global_variables 
+  To use this runtime automatic switching, the variable \b smpi/privatize_global_variables
   should be set to yes
 
 
@@ -576,6 +591,7 @@ simulate the behavior of most of the existing MPI libraries. The \b smpi/coll_se
 uses naive version of collective operations). Each collective operation can be manually selected with a 
 \b smpi/collective_name:algo_name. Available algorithms are listed in \ref SMPI_collective_algorithms .
 
+
 \section options_generic Configuring other aspects of SimGrid
 
 \subsection options_generic_path XML file inclusion path
@@ -638,12 +654,14 @@ It can be done by using XBT. Go to \ref XBT_log for more details.
 
 - \c surf/nthreads: \ref options_model_nthreads
 
+- \c smpi/simulation_computation: \ref options_smpi_bench
 - \c smpi/running_power: \ref options_smpi_bench
 - \c smpi/display_timing: \ref options_smpi_timing
 - \c smpi/cpu_threshold: \ref options_smpi_bench
 - \c smpi/async_small_thres: \ref options_model_network_asyncsend
 - \c smpi/send_is_detached: \ref options_model_smpi_detached
 - \c smpi/coll_selector: \ref options_model_smpi_collectives
+- \c smpi/privatize_global_variables: \ref options_smpi_global
 
 - \c path: \ref options_generic_path
 - \c verbose-exit: \ref options_generic_exit