February 2015

lustre, pread/pwrite and caddr_t

February 26, 2015 by Latham, Robert J.

I just pushed some changes to MPICH master to help ROMIO deal with useful features that might not be available on all platforms and configurations. The system calls pread(2) and pwrite(2) act just like read(2) and write(2), but they take an additional offset parameter. The intent was to make life easier for threaded applications, but …

ROMIO changes in MPICH-3.1.4

February 24, 2015 by Latham, Robert J.

The MPICH team released MPICH-3.1.4 , and with it some ROMIO bug fixes. Not much in the way of new features: continue to improve handing of bogus arguments several GPFS and Blue Gene optimizations continued improvements with IBM PE compatibility picked up a few build-related changes from OpenMPI worked around a strange MPICH type handling …