Hi, I have downloaded the mpich3.3a2, I was checking this function *ADIOI_GEN_WriteStridedColl*() in mpi/romio/adio/common/ad_write_coll.c I was trying to figure out which function will call it. The website http://charm.cs.uiuc.edu/doxygen/charm/adioi__fs__proto_8h.shtml#b325f693fff... shows a caller graph, and it shows ADIOI_XFS_WriteStridedColl is one of the callers. But I couldn't find it in this mpich branch. All it has: ad_xfs.c ad_xfs.h ad_xfs_fcntl.c ad_xfs_hints.c ad_xfs_open.c ad_xfs_read.c ad_xfs_resize.c ad_xfs_write.c Is there any change to the code structure? Best, Jialin