Eager mode is for the first case only (thx adegomme).

[simgrid.git] / docs / source / Configuring_SimGrid.rst

diff --git a/docs/source/Configuring_SimGrid.rst b/docs/source/Configuring_SimGrid.rst
index a2bc3e3..3df5bdd 100644 (file)
--- a/docs/source/Configuring_SimGrid.rst
+++ b/docs/source/Configuring_SimGrid.rst
@@ -105,7 +105,6 @@ Existing Configuration Items
 
 - **host/model:** :ref:`options_model_select`
 
-- **maxmin/precision:** :ref:`cfg=maxmin/precision`
 - **maxmin/concurrency-limit:** :ref:`cfg=maxmin/concurrency-limit`
 
 - **model-check:** :ref:`options_modelchecking`
@@ -141,6 +140,7 @@ Existing Configuration Items
 - **storage/max_file_descriptors:** :ref:`cfg=storage/max_file_descriptors`
 
 - **precision/timing:** :ref:`cfg=precision/timing`
+- **precision/work-amount:** :ref:`cfg=precision/work-amount`
 
 - **For collective operations of SMPI,** please refer to Section :ref:`cfg=smpi/coll-selector`
 - **smpi/auto-shared-malloc-thresh:** :ref:`cfg=smpi/auto-shared-malloc-thresh`
@@ -303,14 +303,14 @@ configurations.
     and slow pattern that follows the actual dependencies.
 
 .. _cfg=bmf/precision:
-.. _cfg=maxmin/precision:
 .. _cfg=precision/timing:
+.. _cfg=precision/work-amount:
 
 Numerical Precision
 ...................
 
-**Option** ``maxmin/precision`` **Default:** 1e-5 (in flops or bytes) |br|
 **Option** ``precision/timing`` **Default:** 1e-9 (in seconds) |br|
+**Option** ``precision/work-amount`` **Default:** 1e-5 (in flops or bytes) |br|
 **Option** ``bmf/precision`` **Default:** 1e-12 (no unit)
 
 The analytical models handle a lot of floating point values. It is
@@ -634,9 +634,12 @@ receive call for small messages sent when the system buffers are empty.
 In SMPI, this depends on the message size, that is compared against two thresholds:
 
 - if (size < :ref:`smpi/async-small-thresh <cfg=smpi/async-small-thresh>`) then
-  MPI_Send returns immediately, even if the corresponding receive has not be issued yet.
-- if (:ref:`smpi/async-small-thresh <cfg=smpi/async-small-thresh>` < size < :ref:`smpi/send-is-detached-thresh <cfg=smpi/send-is-detached-thresh>`) then
-  MPI_Send returns as soon as the corresponding receive has been issued. This is known as the eager mode.
+  MPI_Send returns immediately, and the message is sent even if the
+  corresponding receive has not be issued yet.  This is known as the eager mode.
+- if (:ref:`smpi/async-small-thresh <cfg=smpi/async-small-thresh>` < size <
+  :ref:`smpi/send-is-detached-thresh <cfg=smpi/send-is-detached-thresh>`) then
+  MPI_Send also returns immediately, but SMPI waits for the corresponding
+  receive to be posted, in order to perform the communication operation.
 - if (:ref:`smpi/send-is-detached-thresh <cfg=smpi/send-is-detached-thresh>` < size) then
   MPI_Send returns only when the message has actually been sent over the network. This is known as the rendez-vous mode.