mpdboot requires an `-n N` option. Adjust src/*/README accordingly.

diff --git a/src/MPI2_message_passing/README b/src/MPI2_message_passing/README
index 34db2b50d06fd3bd7c7a7fc9f0976f7d9bec3c7d..20e68868057038b3594c7768c782f8b030bd03e4 100644 (file)
--- a/src/MPI2_message_passing/README
+++ b/src/MPI2_message_passing/README
@@ -52,10 +52,10 @@ Usage
 
 Start the Message Passing Daemons with
 
-    $ mpdboot -f mpd.hosts
+    $ mpdboot -n 4 -f mpd.hosts
 
-which spawns a daemon (`mpd`) on each host.  Then run your program
-(e.g. `simplest_message`) with.
+which spawns a daemon (`mpd`) on the first four hosts in `mpd.hosts`.
+Then run your program (e.g. `simplest_message`) with.
 
     $ mpiexec -n 4 ./simplest_message
 

diff --git a/src/average/README b/src/average/README
index 22d61cc6e90e04cd6505f9c7692000ef27e6b062..f5826496c175e33a802d5c237515aa3d4f37c88b 100644 (file)
--- a/src/average/README
+++ b/src/average/README
@@ -35,6 +35,6 @@ Serial code
 
 Parallel code
 
-    $ mpdboot -f mpd.hosts
+    $ mpdboot -n 4 -f mpd.hosts
     $ mpiexec -n 4 ./average_parallel data
     $ mpdallexit

diff --git a/src/global_operations/README b/src/global_operations/README
index dbafc6c726b5cd0abe7d175f0bff77de87a19ffd..ea5834cb4efd1ee17e62cdaa40ad399b38b632a4 100644 (file)
--- a/src/global_operations/README
+++ b/src/global_operations/README
@@ -32,7 +32,7 @@ Serial code
 
 Parallel code
 
-    $ mpdboot -f mpd.hosts
+    $ mpdboot -n 4 -f mpd.hosts
     $ mpiexec -n 4 ./global_mpi_operations
     $ mpiexec -n 4 ./broadcast
     $ mpdallexit

diff --git a/src/hello_MPI/README b/src/hello_MPI/README
index c3c1ca16178099b5eb3b32d13b595d104e2af1e6..16eee06ec9479e571f6884f5fc72821004763ddd 100644 (file)
--- a/src/hello_MPI/README
+++ b/src/hello_MPI/README
@@ -54,10 +54,11 @@ Create a list of possible hosts `mpd.hosts`, for example
     xphy1.physics.xterm.net
     xphy2.physics.xterm.net
     ...
+    xphy15.physics.xterm.net
 
 Start the Message Passing Daemons with
 
-    $ mpdboot -f mpd.hosts
+    $ mpdboot -n 15 -f mpd.hosts
 
 which spawns a daemon (`mpd`) on each host.  Then run your program
 (e.g. `hello`) with.