diff --git a/darshan-runtime/doc/darshan-runtime.txt b/darshan-runtime/doc/darshan-runtime.txt index 7c40c51ed417a1a337677b22683387dde41de9b1..80627b9ff92c962bc92f64e9663327a2d8376137 100644 --- a/darshan-runtime/doc/darshan-runtime.txt +++ b/darshan-runtime/doc/darshan-runtime.txt @@ -196,13 +196,17 @@ The following example shows how to configure Darshan on a BG/P system: ./configure --with-mem-align=16 \ --with-log-path=/home/carns/working/darshan/releases/logs \ --prefix=/home/carns/working/darshan/install --with-jobid-env=COBALT_JOBID \ - --with-zlib=/soft/apps/zlib-1.2.3/ \ + --with-zlib=/soft/apps/zlib-1.2.3/ --enable-stat-at-open \ --host=powerpc-bgp-linux CC=/bgsys/drivers/ppcfloor/comm/default/bin/mpicc ---- .Rationale [NOTE] ==== +The --enable-stat-at-open time option is specified to allow Darshan to +collect additional information for newly opened files. The GPFS file system +typically deployed in conjunction with Blue Gene systems does not produce +significant additional overhead from the use of this option. The memory alignment is set to 16 not because that is the proper alignment for the BG/P CPU architecture, but because that is the optimal alignment for the network transport used between compute nodes and I/O nodes in the