This commit makes changes to the AIORI backends to add support for
abstacting statfs, mkdir, rmdir, stat, and access. These new
abstractions are used by a modified mdtest. Some changes:
- Require C99. Its 2017 and most compilers now support C11. The
benefits of using C99 include subobject naming (for aiori backend
structs), and fixed size integers (uint64_t). There is no reason to
use the non-standard long long type.
- Moved some of the aiori code into aiori.c so it can be used by both
mdtest and ior.
- Code cleanup of mdtest. This is mostly due to the usage of the IOR
backends rather than a mess of #if code.
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
Changed how the -l option works. Now you choose the type of datapacket
-l i incompressible data packets
-l incompressible incompressible data packets
-l timestamp timestamped data packets
-l t timestamped data packets
-l offset offset data packets
-l o offset data packets
-G option now is either the seed for the incompressible random packets
or the timestamp, depending on the input to the -l option.
-G will no long timestamp packets on its own without the additon of -l timestamp or -l t
I kept shorter versions of the options for the sake of typing sanity.
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)
Enno Zickler