1) Check in potential fix to unreproduceable bug in t_cache observed on
Cobalt
2) Check in code supporting added pinned entry features in the metadata
cache.
Description:
1) Elena encountered a bug in t_cache when running on Cobalt. On
investigation I found a potential race condition in t_cache that
could explain her observation.
2) Quincey requested additions to the metadata cache allowing renaming
of pinned entryies, and marking of pinned or protected entries as
dirty.
Solution:
1) Modified t_cache.c to prevent the potential race condition. Elena
was unable to reproduce the bug on Cobalt, so we don't know if my
fix actually addressed the problem.
2) Added code supporting the requested functions. The changes were
relatively trivial, but required substantial new test code.
Platforms tested:
h5committest, serial test on heping, parallel test on phoenix.
Misc. update:
Bug fix
Description:
Fix two test bugs:
1) Unitialized variable bug in test of H5C_get_entry_status()
(in test/cache.c)
2) Incorrect initialization of constant in t_cache when running
with MPE. (in testpar/t_cache.c)
Solution:
1) Don't test uninitialize variable.
2) Correct initialzation of constant in MPE case.
Platforms tested:
Tested on Heping and Copper.
Misc. update:
Code cleanup/feature twist
Description:
Adjust recent H5AC routines to take H5F_t pointers instead of H5C_t
pointers, to match the rest of the H5AC routines.
This change propagated into a few of the tests, which also had some
compiler warnings cleaned up...
Platforms tested:
FreeBSD 4.11 (sleipnir) w/parallel
Linux 2.4/64 (mir) w/C++ & FORTRAN
Add pinned entry capability to cache.
Description:
For frequently accessed cache entries, the protect/unprotect overhead
is sometimes a bottleneck.
Solution:
Allow entries to be pinned in the cache. Pinned entries can't be
evicted, but can be flushed or modified.
Platforms tested:
h5committested -- minus one small typo in test/cache.c whose fix was
tested on copper and heping only.
Misc. update:
bug fix.
Description:
The MPE_Stop_log did not work in copper. It spewed out MPE errors
and ended in infinite looping.
Solution:
Changed to a smaller test size to avoid generating huge MPE log files
when MPE is configured in.
Platforms tested:
Copper (mpe)
Misc. update:
Bug fix.
Description:
When MPE is used, the test generates huge Clog files in /tmp that
could fill up the disk (like in Copper.)
Solution:
Turned off MPE logging.
Platforms tested:
heping (pp) and copper(pp)
Misc. update:
Attempt to ensure that the parallel cache test runs at a reasonable
speed with large numbers of processors.
Description:
In some cases, the number of random locks and unlocks was a multiple of
the MPI rank.
Solution:
Use rank % 4 instead of simply rank.
Platforms tested:
copper
Misc. update:
Add a file that I forgot in my last checkin.
Description:
t_cache.c is the source file for the new parallel metadata cache test.
Solution:
See above.
Platforms tested:
h5committested before the last checkin. Will run another
h5committest shortly, but it shouldn't be necessary as there
are no new changes.
Misc. update:
