CarpetLib: Make many MPI experiments configurable

Add new parameters:

BOOLEAN interleave_communications:
Try to interleave communications with each other; each processor
begins to communicate with its 'right neighbour' in rank, instead of
with the root processor

BOOLEAN vary_tags:
Use different tags for each communication

BOOLEAN barrier_between_stages:
Add a barrier between the communication stages (slows down, but may
make timing numbers easier to interpret)

BOOLEAN combine_sends:
Send data together and in order of processor ranks

BOOLEAN reduce_mpi_waitall:
Call MPI_Waitall only for requests that are not null

BOOLEAN use_mpi_send:
Use MPI_Send instead of MPI_Isend

BOOLEAN use_mpi_ssend:
Use MPI_Ssend instead of MPI_Isend

darcs-hash:20061206165333-dae7b-8ba40bd19fb1733336e60cb7e6bfa0ebfe0d546d.gz

1 files changed, 32 insertions, 0 deletions

diff --git a/Carpet/CarpetLib/param.ccl b/Carpet/CarpetLib/param.ccl
index 2292280c6..8d736ed3f 100644
--- a/Carpet/CarpetLib/param.ccl
+++ b/Carpet/CarpetLib/param.ccl
@@ -82,6 +82,38 @@ STRING memstat_file "File name in which memstat output is collected (because std
 
 
 
+# Experimental communication parameters
+
+BOOLEAN interleave_communications "Try to interleave communications with each other; each processor begins to communicate with its 'right neighbour' in rank, instead of with the root processor" STEERABLE=always
+{
+} "no"
+
+BOOLEAN vary_tags "Use different tags for each communication" STEERABLE=always
+{
+} "no"
+
+BOOLEAN barrier_between_stages "Add a barrier between the communication stages (slows down, but may make timing numbers easier to interpret)" STEERABLE=always
+{
+} "no"
+
+BOOLEAN combine_sends "Send data together and in order of processor ranks" STEERABLE=always
+{
+} "no"
+
+BOOLEAN reduce_mpi_waitall "Call MPI_Waitall only for requests that are not null" STEERABLE=always
+{
+} "no"
+
+BOOLEAN use_mpi_send "Use MPI_Send instead of MPI_Isend" STEERABLE=always
+{
+} "no"
+
+BOOLEAN use_mpi_ssend "Use MPI_Ssend instead of MPI_Isend" STEERABLE=always
+{
+} "no"
+
+
+
 SHARES: IO
 
 USES STRING out_dir