Simulation time: 1e3 seconds.
\endverbatim
+\subsection options_smpi_temps smpi/keep-temps: not cleaning up after simulation
+
+\b Default: 0 (false)
+
+Under some conditions, SMPI generates a lot of temporary files. They
+usually get cleaned, but you may use this option to not erase these
+files. This is for example useful when debugging or profiling
+executions using the dlopen privatization schema, as missing binary
+files tend to fool the debuggers.
+
\subsection options_model_smpi_lat_factor smpi/lat-factor: Latency factors
The motivation and syntax for this option is identical to the motivation/syntax
--cfg=smpi/papi-events:"default:PAPI_L3_LDM:PAPI_L2_LDM"
\endverbatim
-\subsection options_smpi_global smpi/privatization: Automatic privatization of global variables
+\subsection options_smpi_privatization smpi/privatization: Automatic privatization of global variables
MPI executables are usually meant to be executed in separated processes, but SMPI is
executed in only one process. Global variables from executables will be placed
You can disable this behavior and come back to regular mallocs (for
example for debugging purposes) using \c "no" as a value.
+If you want to keep private some parts of the buffer, for instance if these
+parts are used by the application logic and should not be corrupted, you
+can use SMPI_PARTIAL_SHARED_MALLOC(size, offsets, offsets_count).
+
+As an example,
+
+\code{.unparsed}
+ mem = SMPI_PARTIAL_SHARED_MALLOC(500, {27,42 , 100,200}, 2);
+\endcode
+
+will allocate 500 bytes to mem, such that mem[27..41] and mem[100..199]
+are shared and other area remain private.
+
+Then, it can be deallocated by calling SMPI_SHARED_FREE(mem).
+
+When smpi/shared-malloc:global is used, it is possible to optimize even
+further the memory consumption and the simulation time by using huge pages.
+To do so, it is required to mount a hugetlbfs on your system and allocate
+at least one huge page:
+
+\code{.unparsed}
+ mkdir /home/huge
+ sudo mount none /home/huge -t hugetlbfs -o rw,mode=0777
+ sudo sh -c 'echo 1 > /proc/sys/vm/nr_hugepages'
+\endcode
+
+Then, you can pass the option --cfg=smpi/shared-malloc-hugepage:/home/huge
+to smpirun.
+
\subsection options_model_smpi_wtime smpi/wtime: Inject constant times for calls to MPI_Wtime
\b Default value: 0
- \c smpi/iprobe: \ref options_model_smpi_iprobe
- \c smpi/iprobe-cpu-usage: \ref options_model_smpi_iprobe_cpu_usage
- \c smpi/init: \ref options_model_smpi_init
+- \c smpi/keep-temps: \ref options_smpi_temps
- \c smpi/lat-factor: \ref options_model_smpi_lat_factor
- \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/privatization: \ref options_smpi_privatization
- \c smpi/send-is-detached-thresh: \ref options_model_smpi_detached
- \c smpi/shared-malloc: \ref options_model_smpi_shared_malloc
- \c smpi/simulate-computation: \ref options_smpi_bench
