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* [svn-r12774] Modified flush code in the metadata cache to allow it toJohn Mainzer2006-10-181-2/+59
| | | | | | | | | | | | | | | | | handle flush callbacks which can dirty other entries, and resize and/or rename the target entry. This feature is needed by the fractal heap code. Also added associated test code. H5Commit tested. Test failed on heping, but the error appears to be a syntax error in an un-related file. Tests on copper & sol passed, along with tests on phoenix.
* [svn-r12595] Modified H5C_insert_entry() to accept the H5C__PIN_ENTRY_FLAG entryJohn Mainzer2006-08-171-0/+6
| | | | | | | | | | | flag, and pin an entry as it is inserted. The objective is to avoid some function call overhead in fheap. Also added matching test code in test/cache.c & test/cache_common.c (also testpar/t_cache.c checked in separately by accident) h5commit tested
* [svn-r12525] Description:Quincey Koziol2006-08-021-1/+1
| | | | | | | | | | | Refactored free space manager to use metadata cache for serialized free space sections. This speeds up the fractal heap test considerably... Tested: FreeBSD 4.11 (sleipnir) Linux 2.4/32 (chicago) Linux 2.4/64 (mir) Mac OS X (amazon)
* [svn-r12462] Committed a variety of metadata cache related changes:John Mainzer2006-07-131-0/+14
| | | | | | | | | | | | | | | | | | | | | | 1) Added trace file support to the metadata cache. This allows capture of all metadata cache calls in trace files for purposes of optimization and debuging. 2) Added an expunge entry function. This allows an entry to be deleteded from the cache without writing it to disk even if it is dirty. 3) Added a function call to resize pinned entries. 4) Added code to deal with entries that are dirty on load. This is needed in support of a bug fix which can alter object headers on load to repair files. 5) Added progress reporting code to the "MDC API smoke check" test in cache_api.c. To enable the progress reporting, set report_progress to TRUE in mdc_api_call_smoke_check(). Tested with h5committest, and a parallel test on phoenix (dual athelon linux box).
* [svn-r12440] Purpose:Quincey Koziol2006-06-271-24/+24
| | | | | | | | | | | Code cleanup Description: Trim trailing whitespace in Makefile.am and C/C++ source files to make diffing changes easier. Platforms tested: None necessary, whitespace only change
* [svn-r12349] Purpose:Quincey Koziol2006-05-151-1/+1
| | | | | | | | | | | | | | | Code checkpoint Description: Checkpoint fractal heap improvements, as well as move the free space manager code that it's using into a separate package. Platforms tested: FreeBSD 4.11 (sleipnir) Linux 2.4/64 (mir) w/C++ & FORTRAN Linux 2.4/32 (heping) Solaris 2.9 (shanti) AIX 5.? (copper) w/FORTRAN & parallel
* [svn-r12311] Purpose:John Mainzer2006-04-281-1/+100
| | | | | | | | | | | | | | | | | | | | | | | | | 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:
* [svn-r12084] Purpose:Quincey Koziol2006-03-131-1/+1
| | | | | | | | | | | | | | | | Code checkpoint Description: The fractal heap code is reasonably stable and is passing all its current tests, so checkpoint everything with CVS. Also, add "statistics" module for v2 B-trees code, which is only a stub right now. Platforms tested: FreeBSD 4.11 (sleipnir) Mac OSX (amazon) Linux 2.4 (chicago)
* [svn-r12004] Purpose:Quincey Koziol2006-03-041-1/+1
| | | | | | | | | | | | | | | | | New feature & code cleanup Description: Update fractal heap to be able to insert objects into a direct block hanging off the header. Extract "octal dump" code into separate routine so that both the local heaps & fractal heaps can use it. Other code cleanups & support to get this far. Platforms tested: FreeBSD 4.11 (sleipnir) Linux 2.4
* [svn-r11967] Purpose:Quincey Koziol2006-02-271-1/+1
| | | | | | | | | | | | | | | New feature Description: Check in initial "fractal heap" code, for supporting the group redesign. Also, remove some remnants of the segmented heap/block tracker/B+tree code which I didn't find during the last pass. Platforms tested: FreeBSD 4.11 (sleipnir) Mac OSX (amazon) Linux 2.4
* [svn-r11965] Purpose:Quincey Koziol2006-02-241-1/+1
| | | | | | | | | | | | Maintenance Description: Remove half-built (half-baked? :-) implementation of B+tree, block tracker and segmented heaps. (In preparation for starting the new heap coding) Platforms tested: FreeBSD 4.11 (sleipnir) Linux 2.4 (heping)
* [svn-r11897] Purpose:John Mainzer2006-01-271-3/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) Add parallel test for metadata cache 2) Split serial test for metadata cache into two parts 3) Fix bug in which cache was flushed needlessly when the cache wasn't full. 4) Performance improvements 5) Update API for parallel cache coherency bug fix. Description: See above. Solution: See above. Platforms tested: h5committest Misc. update:
* [svn-r11470] Purpose:John Mainzer2005-09-271-1/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Repair synchronization bug in the metadata cache in PHDF5 Also repair numerous other bugs that surfaced in testing the bug fix. Description: While operations modifying metadata must be collective, we allow independant reads. This allows metadata caches on different processes to adjust to different sizes, and to place the entries on their dirty lists in different orders. Since only process 0 actually writes metadata to disk (all other processes thought they did, but the writes were discarded on the theory that they had to be collective), this made it possible for another process to modify metadata, flush it, and then read it back in in its original form (pre-modification) form. The possibilities for file corruption should be obvious. Solution: Make the policy that only process 0 can write to file explicit, and visible to the metadata caches. Thus only process 0 may flush dirty entries -- all other caches must retain dirty entries until they are informed by process 0 that the entries are clean. Synchronization is handled by counting the bytes of dirty cache entries created, and then synching up between the caches whenever the sum exceeds an (eventually user specified) limit. Dirty metadata creation is consistent across all processes because all operations modifying metadata must be collective. This change uncovered may bugs which are repaired in this checkin. It also required modification of H5HL and H5O to allocate file space on insertion rather than on flush from cache. Platforms tested: H5committest, heping(parallel & serial) Misc. update:
* [svn-r11245] Purpose:Quincey Koziol2005-08-131-95/+95
| | | | | | | | | | | | | | | | | | | | Code cleanup Description: Trim trailing whitespace, which is making 'diff'ing the two branches difficult. Solution: Ran this script in each directory: foreach f (*.[ch] *.cpp) sed 's/[[:blank:]]*$//' $f > sed.out && mv sed.out $f end Platforms tested: FreeBSD 4.11 (sleipnir) Too minor to require h5committest
* [svn-r11031] Purpose:Quincey Koziol2005-07-061-1/+1
| | | | | | | | | | | | | New feature Description: Initial checkin of B+ Tree code. Platforms tested: FreeBSD 4.11 (sleipnir) h5committest Misc. update:
* [svn-r10688] Purpose:John Mainzer2005-04-281-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | Add API calls allowing user control of the metadata cache. Description: Prior to this update, the metadata cache was not configurable from outside the library. Solution: Add API calls allowing the user to configure the metadata cache either at file open time, or for any open file. Also added calls permitting the user to monitor cache size and hit rate. These latter facilities are needed for "manual" cache size control Platforms tested: h5committested Misc. update:
* [svn-r10506] Purpose:Quincey Koziol2005-03-291-1/+1
| | | | | | | | | | | | New feature Description: Add first iteration of "segmented heap" code, which will be used to store links in groups in a more flexible way than the previous "local heap" mechanism. Platforms tested: FreeBSD 4.11 (sleipnir) w/parallel Solaris 2.9 (shanti)
* [svn-r9687] Purpose:John Mainzer2004-12-181-0/+686
Modify the cache code (H5C) to support automatic cache resizing to adapt to the work load at run time. Description: Different applications require different sized caches to maintain an acceptable hit rate. This set of changes attempts to provide the ability to adjust to circumstances automatically. Solution: Added highly configurable code to allow the user to either set a fixed cache size, or allow the cache to grow and shrink according to conditions. If enabled, cache size increases are triggered when the hit rate drops below a user specified threshold in a user specified interval. Cache size reductions (if enabled) are triggered when either the hit rate exceeds some user specified threshold over a user specified interval, when the cache contains "enough" entries that haven't been accessed for a user specified interval, or some mix of the above. See the header comments on the H5C_auto_size_ctl_t structure in H5Cprivate.h for further details. At present, the cache resize configuration options are not accessible via the user API. Must add this. Platforms tested: h5committested, heping (serial), and copper (parallel) Misc. update: