From 25837d324e306ea5631029b5b14e34d4a5e97c59 Mon Sep 17 00:00:00 2001
From: MuQun Yang <ymuqun@hdfgroup.org>
Date: Thu, 16 Feb 2006 12:12:08 -0500
Subject: [svn-r11951] Purpose: Enhance collective chunk IO supports

Description:
Add a new test to check the correctness of the HDF5 library behavior for collective IO mode when one process doesn't have any contribution for IO.

Solution:

Platforms tested:
IBM AIX 5.2(copper)
Linux (heping) mpich-1.2.6


Misc. update:
---
 testpar/t_coll_chunk.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++---
 testpar/testphdf5.c    |  4 +++
 testpar/testphdf5.h    |  1 +
 3 files changed, 71 insertions(+), 4 deletions(-)

diff --git a/testpar/t_coll_chunk.c b/testpar/t_coll_chunk.c
index 0545bd1..f403b53 100644
--- a/testpar/t_coll_chunk.c
+++ b/testpar/t_coll_chunk.c
@@ -177,6 +177,57 @@ coll_chunk3(void)
 
 }
 
+/*-------------------------------------------------------------------------
+ * Function:	coll_chunk4
+ *
+ * Purpose:	Wrapper to test the collective chunk IO for regular JOINT 
+                selection with at least number of 2*mpi_size chunks
+ *
+ * Return:	Success:	0
+ *
+ *		Failure:	-1
+ *
+ * Programmer:	Unknown
+ *		July 12th, 2004
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/* ------------------------------------------------------------------------
+ *  Descriptions for the selection: one singular selection accross many chunks
+ *  Two dimensions, Num of chunks = 2* mpi_size
+ *
+ *  dim1       = SPACE_DIM1(5760)
+ *  dim2       = SPACE_DIM2(3)
+ *  chunk_dim1 = dim1/mpi_size
+ *  chunk_dim2 = dim2/2
+ *  block      = 1 for all dimensions
+ *  stride     = 1 for all dimensions
+ *  count0     = SPACE_DIM1/mpi_size(5760/mpi_size)
+ *  count1     = SPACE_DIM2(3)
+ *  start0     = mpi_rank*SPACE_DIM1/mpi_size
+ *  start1     = 0
+ *  
+ * ------------------------------------------------------------------------
+ */
+
+void
+coll_chunk4(void)
+{
+
+  const char *filename;
+  int mpi_size;
+
+  MPI_Comm comm = MPI_COMM_WORLD;
+  MPI_Comm_size(comm,&mpi_size);
+
+  filename = GetTestParameters();
+  coll_chunktest(filename,1,BYROW_SELECTNONE);
+
+}
+
 
 /*-------------------------------------------------------------------------
  * Function:	coll_chunktest
@@ -397,7 +448,6 @@ ccslab_set(int mpi_rank,
 	start[0]  =  mpi_rank*count[0];
 	start[1]  =  0;
 
-	if (VERBOSE_MED) printf("slab_set BYROW_CONT\n");
 	break;
 
     case BYROW_DISCONT:
@@ -411,11 +461,24 @@ ccslab_set(int mpi_rank,
 	start[0]  =  SPACE_DIM1/mpi_size*mpi_rank;
 	start[1]  =  0;
 
-	if (VERBOSE_MED) printf("slab_set BYROW_DISCONT\n");
 	break;
+
+    case BYROW_SELECTNONE:
+	/* Each process takes a slabs of rows, there are
+           no selections for the last process. */
+	block[0]  =  1;
+	block[1]  =  1;
+	stride[0] =  1;
+	stride[1] =  1;
+	count[0]  =  ((mpi_rank == (mpi_size-1))?0:SPACE_DIM1/mpi_size);
+	count[1]  =  SPACE_DIM2;
+	start[0]  =  mpi_rank*count[0];
+	start[1]  =  0;
+
+	break;
+    
     default:
 	/* Unknown mode.  Set it to cover the whole dataset. */
-	printf("unknown slab_set mode (%d)\n", mode);
 	block[0]  = SPACE_DIM1;
 	block[1]  = SPACE_DIM2;
 	stride[0] = block[0];
@@ -425,7 +488,6 @@ ccslab_set(int mpi_rank,
 	start[0]  = 0;
 	start[1]  = 0;
 
-	if (VERBOSE_MED) printf("slab_set wholeset\n");
 	break;
     }
     if (VERBOSE_MED){
diff --git a/testpar/testphdf5.c b/testpar/testphdf5.c
index f607d8f..dba93aa 100644
--- a/testpar/testphdf5.c
+++ b/testpar/testphdf5.c
@@ -323,6 +323,8 @@ h5_mpi_get_file_size(const char *filename, MPI_Comm comm, MPI_Info info)
         size=0;
 
 done:
+    printf("size in llu = %llu\n",size);
+    printf("size in lld = %lld\n",size);
     return(size);
 }
 
@@ -427,6 +429,8 @@ int main(int argc, char **argv)
 	coll_chunk2,NULL, "noncontiguous collective chunk io",PARATESTFILE);
     AddTest("cchunk3",
 	coll_chunk3,NULL, "multi-chunk collective chunk io",PARATESTFILE);
+  AddTest("cchunk4",
+        coll_chunk4,NULL, "collective chunk io with partial non-selection ",PARATESTFILE);
 
 /* irregular collective IO tests*/
     AddTest("ccontw",
diff --git a/testpar/testphdf5.h b/testpar/testphdf5.h
index e085b62..416c3d3 100644
--- a/testpar/testphdf5.h
+++ b/testpar/testphdf5.h
@@ -55,6 +55,7 @@
 #define SPACE_DIM2 3
 #define BYROW_CONT 1
 #define BYROW_DISCONT 2
+#define BYROW_SELECTNONE 3
 #define DSET_COLLECTIVE_CHUNK_NAME "coll_chunk_name"
 
 
-- 
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