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Update
Description:
Updated the Copyright statement
Platforms tested:
Linux (This change is only in the comments, so I just check that the
modules still compile)
Misc. update:
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Lots of performance improvements & a couple new internal API interfaces.
Description:
Performance Improvements:
- Cached file offset & length sizes in shared file struct, to avoid
constantly looking them up in the FCPL.
- Generic property improvements:
- Added "revision" number to generic property classes to speed
up comparisons.
- Changed method of storing properties from using a hash-table
to the TBBT routines in the library.
- Share the propery names between classes and the lists derived
from them.
- Removed redundant 'def_value' buffer from each property.
- Switching code to use a "copy on write" strategy for
properties in each list, where the properties in each list
are shared with the properties in the class, until a
property's value is changed in a list.
- Fixed error in layout code which was allocating too many buffers.
- Redefined public macros of the form (H5open()/H5check, <variable>)
internally to only be (<variable>), avoiding innumerable useless
calls to H5open() and H5check_version().
- Reuse already zeroed buffers in H5F_contig_fill instead of
constantly re-zeroing them.
- Don't write fill values if writing entire dataset.
- Use gettimeofday() system call instead of time() system when
checking the modification time of a dataset.
- Added reference counted string API and use it for tracking the
names of objects opening in a file (for the ID->name code).
- Removed redundant H5P_get() calls in B-tree routines.
- Redefine H5T datatype macros internally to the library, to avoid
calling H5check redundantly.
- Keep dataspace information for dataset locally instead of reading
from disk each time. Added new module to track open objects
in a file, to allow this (which will be useful eventually for
some FPH5 metadata caching issues).
- Remove H5AC_find macro which was inlining metadata cache lookups,
and call function instead.
- Remove redundant memset() calls from H5G_namei() routine.
- Remove redundant checking of object type when locating objects
in metadata cache and rely on the address only.
- Create default dataset object to use when default dataset creation
property list is used to create datasets, bypassing querying
for all the property list values.
- Use default I/O vector size when performing raw data with the
default dataset transfer property list, instead of querying for
I/O vector size.
- Remove H5P_DEFAULT internally to the library, replacing it with
more specific default property list based on the type of
property list needed.
- Remove redundant memset() calls in object header message (H5O*)
routines.
- Remove redunant memset() calls in data I/O routines.
- Split free-list allocation routines into malloc() and calloc()-
like routines, instead of one combined routine.
- Remove lots of indirection in H5O*() routines.
- Simplify metadata cache entry comparison routine (used when
flushing entire cache out).
- Only enable metadata cache statistics when H5AC_DEBUG is turned
on, instead of always tracking them.
- Simplify address comparison macro (H5F_addr_eq).
- Remove redundant metadata cache entry protections during dataset
creation by protecting the object header once and making all
the modifications necessary for the dataset creation before
unprotecting it.
- Reduce # of "number of element in extent" computations performed
by computing and storing the value during dataspace creation.
- Simplify checking for group location's file information, when file
has not been involving in file-mounting operations.
- Use binary encoding for modification time, instead of ASCII.
- Hoist H5HL_peek calls (to get information in a local heap)
out of loops in many group routine.
- Use static variable for iterators of selections, instead of
dynamically allocation them each time.
- Lookup & insert new entries in one step, avoiding traversing
group's B-tree twice.
- Fixed memory leak in H5Gget_objname_idx() routine (tangential to
performance improvements, but fixed along the way).
- Use free-list for reference counted strings.
- Don't bother copying object names into cached group entries,
since they are re-created when an object is opened.
The benchmark I used to measure these results created several thousand
small (2K) datasets in a file and wrote out the data for them. This is
Elena's "regular.c" benchmark.
These changes resulted in approximately ~4.3x speedup of the
development branch when compared to the previous code in the
development branch and ~1.4x speedup compared to the release
branch.
Additionally, these changes reduce the total memory used (code and
data) by the development branch by ~800KB, bringing the development
branch back into the same ballpark as the release branch.
I'll send out a more detailed description of the benchmark results
as a followup note.
New internal API routines:
Added "reference counted strings" API for tracking strings that get
used by multiple owners without duplicating the strings.
Added "ternary search tree" API for text->object mappings.
Platforms tested:
Tested h5committest {arabica (fortran), eirene (fortran, C++)
modi4 (parallel, fortran)}
Other platforms/configurations tested?
FreeBSD 4.7 (sleipnir) serial & parallel
Solaris 2.6 (baldric) serial
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Purpose:
new functions
Description:
H5Gget_num_objs, H5Gget_objname_by_idx and H5Gget_objtype_by_idx.
Platforms tested:
modi4, arabica, eirene
Misc. update:
RELEASE.txt updated.
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Code cleanup
Description:
Cleanup up a few compiler warnings...
Platforms tested:
IRIX64 6.5 (modi4) w/parallel
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Code cleanup
Description:
Cleanup compiler warnings found by the SGI compiler and gcc 3.0
Platforms tested:
FreeBSD 4.5 w/gcc 3.0 (hack) && IRIX64 (modi4)
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Code cleanup for better compatibility with C++ compilers
Description:
C++ compilers are choking on our C code, for various reasons:
we used our UNUSED macro incorrectly when referring to pointer types
we used various C++ keywords as variables, etc.
we incremented enum's with the ++ operator.
Solution:
Changed variables, etc.to avoid C++ keywords (new, class, typename, typeid,
template)
Fixed usage of UNUSED macro from this:
char UNUSED *c
to this:
char * UNUSED c
Switched the enums from x++ to x=x+1
Platforms tested:
FreeBSD 4.4 (hawkwind)
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code warrior support
and some clean up
the macros file_seek and file_offset_t that were repeated over sevral files were put only in
H5private.h
H5private .h was updated for win32
vthe
Description:
Solution:
Platforms tested:
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Update
Description:
Changed includes of the form:
#include <hdf5_file.h>
to
#include "hdf5_file.h"
so that gcc can pick them up easier without including the system
header files since we don't care about them.
Platforms tested:
Linux
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Code Tweaks
Description:
"FILE" macro for file names was getting confused with Standard C __FILE__
macro on certain platforms.
Solution:
Changed "FILE" macro usage to "DATAFILE"
Platforms tested:
FreeBSD 4.3 (hawkwind)
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Bug fix (sort of)
Description:
The RCSID string in H5public.h was causing the C++ code problem as it
was included multiple times and C++ did not like multiple definitions
of the same static variable.
Solution:
Since we don't really make use of the RCSID strings as we have not
installed it in all source files, we decided to remove it.
Platforms tested:
eirene (linux), modi4 (IRIX64-64) both serial and parallel modes.
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** src/H5Tconv.c
** src/H5Tpkg.h
** src/H5Tpublic.h
The H5T_conv_struct_opt() function had a design flaw -- it
didn't keep information about the stride to use to step
through the temporary/background-value buffer and thus nested
invocations would clobber each other's temp buffers. This was
fixed by splitting the `stride' argument into `buf_stride' and
`bkg_stride' arguments for all the conversion functions. THIS
IS AN API CHANGE, but users will get a compiler warning when
they pass their conversion function pointer to H5Tregister().
** src/H5T.c
** src/H5Tprivate.h
Added a bkg_stride argument to the H5T_convert() definition in
order to fix a bug related to the optimized compound datatype
conversion function.
** src/H5T.c
** src/H5A.c
** src/H5D.c
** src/H5Ofill.c
** src/H5P.c
Added bkg_stride=0 argument to the H5T_convert() calls.
** test/dtypes.c
Added a test for the H5T_conv_struct_opt() bug fixed above.
** src/H5FL.c
The H5FL_term() function should return non-zero even when it
couldn't free all the free lists do to their being used by
some other package. When that other package terminates it
will return non-zero, causing H5FL_term() to be called
again. This fixes some of the `infinite loop closing library'
messages.
** tools/pdb2hdf
Uses print_version() instead of doing that itself.
** src/H5Ppublic.h
Renamed H5Pget_gc_reference() declaration to make it match the
definition.
** src/H5FDlog.c
Added API tracing macros.
Removed `const' qualifier from a `char*' member of a struct
which was allocated on the heap.
** src/H5TB.c
Added curly braces to a couple deeply-nested `if' statements
to make them clearer and to shut up the increadibly stupid and
just plain incorrect gcc warning about ambiguous `else'.
** test/titerate.c
Removed incomplete initialization in favor of memset() for one
auto variable to stop compiler warnings.
** tools/Depencencies
Regenerated to remove references to h5dumputil.c
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B-tree nodes
and callback functions which returned non-zero were not working correctly.
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