Load balancing grid decomposition for PUGH.

Contributed by Matei Ripeneau


Here are his notes (hopefully there will soon be PUGH docs to add them to):


1. Purpose

Allow manual (user specified) grid partitioning


2. Parameters

I've added the following parameters to ./PUGH/param.ccl

KEYWORD partition "Is the partition manual/automatic"
{
 "automatic"    :: "even implicit partition"
 "manual"       :: "specified by partition_#d_XYZ .."
} "automatic"

STRING partition_1d_X "Tells how to partition on direction X"  ...
STRING partition_2d_X "Tells how to partition on direction X"  ...
STRING partition_2d_Y "Tells how to partition on direction Y"  ...
STRING partition_3d_X "Tells how to partition on direction X"  ...
STRING partition_3d_Y "Tells how to partition on direction Y"  ...
STRING partition_3d_Z "Tells how to partition on direction Z"  ...

(all these strings have default "")


How to specify a manual partition?

Simpler to explain using an example: partitioning a grid space with 30 x 30 x
30 points for a configuration with 8 processors can be specified as:

PUGH::partition = "manual"
PUGH::partition_1d_X = ""           // uses default
PUGH::partition_2d_X = "16:14"
PUGH::partition_2d_Y = "7:9:5:9"
PUGH::partition_3d_X = "16:14"
PUGH::partition_3d_Y = "12:18"
PUGH::partition_3d_Z = "17:13"

Even if PUGH::partition = "manual" an empty string like PUGH::partition_1d_X =
"" will lead to default (even) partition on that direction


git-svn-id: http://svn.cactuscode.org/arrangements/CactusPUGH/PUGH/trunk@174 b61c5cb5-eaca-4651-9a7a-d64986f99364

1 files changed, 35 insertions, 0 deletions

diff --git a/param.ccl b/param.ccl
index d4d9db7..66e7751 100644
--- a/param.ccl
+++ b/param.ccl
@@ -159,3 +159,38 @@ BOOLEAN zero_memory "Zero memory for GF's at allocation time ?"
 } yes
 
 
+KEYWORD partition "Is the partition manual"
+{
+ "automatic"    :: "even"
+ "manual"       :: "specified by partition_XYZ .."
+} "automatic"
+
+STRING partition_1d_X "Tells how to partition on direction X"
+{
+.*
+} ""
+
+STRING partition_2d_X "Tells how to partition on direction X"
+{
+.*
+} ""
+
+STRING partition_2d_Y "Tells how to partition on direction X"
+{
+.*
+} ""
+
+STRING partition_3d_X "Tells how to partition on direction X"
+{
+.*
+} ""
+
+STRING partition_3d_Y "Tells how to partition on direction X"
+{
+.*
+} ""
+
+STRING partition_3d_Z "Tells how to partition on direction X"
+{
+.*
+} ""