NERSCPowering Scientific Discovery Since 1974

Open Issues

DVS scalability issue on GPFS file system when reading an initialization file with a small IO size

April 5, 2011 by Helen He | 0 Comments

Description:

It has been observed by some users that it takes a very long time at job start up for the initial IO when the input files are in GPFS file systems, such as /home, /project, or /global/scratch.  The IO time for files in Lustre /scratch or /scratch2 are very fast. This is a DVS bug related to GFPS file systems.

0 comments | Read the full post

Resolved: some OpenMP flags ignored in PGI C/C++ compiler

March 29, 2011 by Helen He | 0 Comments

Description:

OpenMP flags other than -mp=nonuma are ignored with the PGI C and C++ wrapper on Hopper.  The PGI Fortran wrapper behaves correctly.

0 comments | Read the full post

"gni_pub.h" not found in compilation

March 29, 2011 by Helen He | 0 Comments

Description:

After the OS upgrade to CLE3.1UP03, codes using "gni_pub.h" are getting the "gni_pub.h not found" error at compile time.  The workaround is to specify the detailed location of this include file in the CFLAGS or FCFLAGS. For example:  set CFLAGS = "$CFLAGS -I/opt/cray/gni-headers/default/include".

0 comments | Read the full post

Resolved - Segfaults when mixing C/C++ and Fortran under PrgEnv-gnu

February 24, 2011 | 0 Comments

Description

If a code has C/C++ and Fortran routines, it does I/O in a Fortran code and it is built with the GNU compiler, the built executable can generate a segfault during runtime with the following error message:

0 comments | Read the full post

Resolved - Trouble scheduling jobs on large memory nodes

February 5, 2011 by Katie Antypas

We are having some trouble scheduling jobs on the large memory nodes.  This weekend jobs requesting large memory nodes will be held until we can look at the issue more closely next week.

Read the full post

1 2 3