doc: installation

doc/starpu.texi

@@ -171,14 +171,14 @@ not already available on your system. The software can be obtained from
 @indicateurl{http://subversion.tigris.org}.
 
 @item
-To become a member of the project @code{starpu}. For this, you
-first need to get an account to the gForge server. You can then send a
-request to join the project
-(@indicateurl{https://gforge.inria.fr/project/request.php?group_id=1570}).
+You can check out the project's SVN repository through anonymous
+access. This will provide you with a read access to the
+repository.
 
-You can also choose to check out the project's SVN repository through
-anonymous access. In that case, you do not need to become a member,
-and you will only have read access to the repository.
+You can also choose to become a member of the project @code{starpu}.
+For this, you first need to get an account to the gForge server. You
+can then send a request to join the project
+(@indicateurl{https://gforge.inria.fr/project/request.php?group_id=1570}).
 
 @item
 More information on how to get a gForge account, to become a member of
@@ -351,6 +351,13 @@ AFTER First element is 3.140000
 %
 @end example
 
+When StarPU is used for the first time, the directory
+@code{$HOME/.starpu/} is created, performance models will be stored in
+that directory.
+
+Please note that buses are benchmarked when StarPU is launched for the
+first time. This may take a few minutes, or less if @code{hwloc} is
+installed. This step is done only once per user and per machine.
 
 @c ---------------------------------------------------------------------
 @c Configuration options