common/ompio: increase internal default fview size

the internal default file view size of 4MB does not work for
long double etypes on 32 bit platforms, which are 12 bytes. The file
view size has to be an exact multiple of the etype size. Increasing
the internal default file view size to 6MB resolves the issue.

Fixes #10287

Signed-off-by: Edgar Gabriel <[email protected]>

Author: edgargabriel

ompi/mca/common/ompio/common_ompio.h

@@ -88,7 +88,7 @@
 #define OMPIO_LOCK_SELECTIVE      11
 
 #define OMPIO_FCOLL_WANT_TIME_BREAKDOWN 0
-#define MCA_IO_DEFAULT_FILE_VIEW_SIZE 4*1024*1024
+#define MCA_IO_DEFAULT_FILE_VIEW_SIZE 6*1024*1024
 
 #define OMPIO_UNIFORM_DIST_THRESHOLD     0.5
 #define OMPIO_CONTG_THRESHOLD        1048576