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Parallel filesystem I/O benchmark
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GPFS supports a "gpfs_fcntl" method for hinting various things, including "i'm about to write this block of data". Let's see if, for the cost of a few system calls, we can wrangle the GPFS locking system into allowing concurrent access with less overhead. (new IOR parameter gpfsHintAccess) Also, drop all locks on a file immediately after open/creation in the shared file case, since we know all processes will touch unique regions of the file. It may or may not be a good idea to release all file locks after opening. Processes will then have to re-acquire locks already held. (new IOR parameter gpfsReleaseToken)
Building -------- 0. If "configure" is missing from the top level directory, you probably retrieved this code directly from the repository. Run "./bootstrap". If your versions of the autotools are not new enough to run this script, download and official tarball in which the configure script is already provided. 1. Run "./configure" See "./configure --help" for configuration options. 2. Run "make" 3. Optionally, run "make install". The installation prefix can be changed as an option to the "configure" script.