This is not a problem for most backends, but HDFS doesn't support opening
RDWR. If you use only write-oriented or read-oriented flags on the
command-line, CheckRunSettings() will undo the default IOR_RDWR flag and
install the appropriate IOR_WRONLY or IO_RDONLY open-flags, respectively.
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)
Allows every task to allocate a specified amount of memory as
a rough simulation of a real application's memory usage.
Every page of the allocated memory is touch to defeat lazy
memory allocation.
Original patch by Michael Kluge <michael.kluge@tu-dresden.de>
Only print total summary after all tests run.
Put calculated results from each iteration of a test in a separate
IOR_results_t structure. Clean up the allocation and freeing code
for these caluclated bits, which allowing us to hang onto the results
until the end of all tests. That in turn allows us to perform one
big summary at the end of all of the tests.
Clean up the header files to only contain those things that
need to be shared between .c files.
Functions that are not shared are now declared static to
make their file scope explicit. Functions that ARE shared
are declared in appropriate headers.
I am not going to claim that I caugh everything, but at
least it is a good start.
Error out immediately if a lustre option was specified,
but no lustre support was compiled in.
Set a flag when any lustre string options are set, to
make the code cleaner.
Jeff Inman