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| author | John Mainzer <mainzer@hdfgroup.org> | 2004-07-02 19:35:04 (GMT) |
|---|---|---|
| committer | John Mainzer <mainzer@hdfgroup.org> | 2004-07-02 19:35:04 (GMT) |
| commit | c49dd7fa363bdb49416b5587654101064fd547f8 (patch) | |
| tree | e1dbeee84ca50b94dfab9b1ed630d890405c6f78 /src/H5Edefin.h | |
| parent | 072919b9d7fa341c1a886fb92841efa444f0ffae (diff) | |
| download | hdf5-c49dd7fa363bdb49416b5587654101064fd547f8.zip hdf5-c49dd7fa363bdb49416b5587654101064fd547f8.tar.gz hdf5-c49dd7fa363bdb49416b5587654101064fd547f8.tar.bz2 | |
[svn-r8791] Purpose: Rewrote metadata cache (H5AC.c, etc.) to improve performance.
Description:
Replaced the old metadata cache with a cache with a modified LRU
replacement policy. This should improve the hit rate.
Solution:
Since we want to flush cache entries in increasing address order, I
used the threaded binary B-tree code to store the cache entries.
There is a fair bit of overhead here, so we may want to consider
other options.
While the code is designed to allow the support of other replacement
algorithms, at present, only a modified version of LRU is supported.
The modified LRU algorithm requires that a user selectable portion
of the cache entries be clean. The clean entries are evicted first
when writes are not permitted. If the pool of clean entries is used
up, the cache grows beyond its user specified maximum size. The
cache can also exceed its maximum size if the combined size of the
protected (or locked) entries exceeds the maximum size of the cache.
Platforms tested:
eirene (serial, parallel, fp), h5committested
Misc. update:
Diffstat (limited to 'src/H5Edefin.h')
| -rw-r--r-- | src/H5Edefin.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/H5Edefin.h b/src/H5Edefin.h index 2d70e0d..dfd9714 100644 --- a/src/H5Edefin.h +++ b/src/H5Edefin.h @@ -90,8 +90,7 @@ hid_t H5E_NOFILTER_g = FAIL; /* Requested filter is not available */ hid_t H5E_CALLBACK_g = FAIL; /* Callback failed */ hid_t H5E_CANAPPLY_g = FAIL; /* Error from filter 'can apply' callback */ hid_t H5E_SETLOCAL_g = FAIL; /* Error from filter 'set local' callback */ -hid_t H5E_NOENCODER_g = FAIL; /* Filter present but encoder not enabled */ -hid_t H5E_NODECODER_g = FAIL; /* Filter present but decoder not enabled */ +hid_t H5E_NOENCODER_g = FAIL; /* Filter present but encoding disabled */ /* Datatype conversion errors */ hid_t H5E_CANTCONVERT_g = FAIL; /* Can't convert datatypes */ @@ -116,6 +115,7 @@ hid_t H5E_ALREADYEXISTS_g = FAIL; /* Object already exists */ hid_t H5E_CANTLOCK_g = FAIL; /* Unable to lock object */ hid_t H5E_CANTUNLOCK_g = FAIL; /* Unable to unlock object */ hid_t H5E_CANTGC_g = FAIL; /* Unable to garbage collect */ +hid_t H5E_CANTGETSIZE_g = FAIL; /* Unable to compute size */ /* Generic low-level file I/O errors */ hid_t H5E_SEEKERROR_g = FAIL; /* Seek failed */ @@ -151,6 +151,11 @@ hid_t H5E_CANTSERIALIZE_g = FAIL; /* Unable to serialize data from cache * hid_t H5E_CANTLOAD_g = FAIL; /* Unable to load metadata into cache */ hid_t H5E_PROTECT_g = FAIL; /* Protected metadata error */ hid_t H5E_NOTCACHED_g = FAIL; /* Metadata not currently cached */ +hid_t H5E_SYSTEM_g = FAIL; /* Internal error detected */ +hid_t H5E_CANTINS_g = FAIL; /* Unable to insert metadata into cache */ +hid_t H5E_CANTRENAME_g = FAIL; /* Unable to rename metadata */ +hid_t H5E_CANTPROTECT_g = FAIL; /* Unable to protect metadata */ +hid_t H5E_CANTUNPROTECT_g = FAIL; /* Unable to unprotect metadata */ /* Group related errors */ hid_t H5E_CANTOPENOBJ_g = FAIL; /* Can't open object */ |