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Document bug fix
Description:
IMPORTANT! IMPORTANT! IMPORTANT!
A case where metadata in a file could get corrupted in certain unusual
sitations was detected and fixed.
In certain circumstances, metadata could get cached in the raw data cache,
and if that particular piece of metadata was updated on disk while
incorrectly cached, the new metadata would get overwritten with the stale
metadata from the raw data cache when it was flushed out.
Additionally, I've patched up the raw data cache to be smarter about how
much it caches and how much I/O it triggers, leading to some speedups.
Solution:
Changed the raw data I/O routines which perform caching to require a
parameter with the size of the dataset being accessed and limited the
cache to no more than that many bytes.
Platforms tested:
FreeBSD 4.3 (hawkwind)
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Update
Description:
Changed
#include <hdf_file.h>
construct to
#include "hdf_file.h"
so that the GNU compiler can more easily pick up the dependencies
which it places in the .depend and Dependencies files. Also
regenerated the Dependencies to go along with this.
Platforms tested:
Linux
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Bug Fix
Description:
Partial hyperslabs which exactly fit the size of the lowest dimension of
a chunked dataset weren't being output correctly.
Solution:
Forgot to divide the offset (seq_len) by the size of the lower dimension
hyperslabs - fixed now.
Platforms tested:
FreeBSD 4.2 (hawkwind)
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Bug fix.
Description:
Fencepost error in determining number of elements to include in a
partial hyperslab for a chunk.
Solution:
Changed "<down_size[i]"s into "<=down_size[i]"s in a few places, to allow
for exactly one slab being left to output/input.
Platforms tested:
FreeBSD 4.2 (hawkwind)
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Bug Fixes
Description:
Fixed a bug in H5Shyper.c where 'contiguous' hyperslabs (i.e. ones which
took up an entire dataset) were not being detected correctly and would
instead be read a part at a time instead of all at once.
Also fixed a bug in the handling of hyperslabs for chunked datasets where
hyperslabs from chunks which weren't aligned on exact dimension bounaries
were not reading/writing data correctly.
Solution:
H5Shyper.c was a single line change from a 'block' size to a 'count' size.
H5Fseq.c changes we much more significant and involved detecting when
non-chunk aligned sequences of data were being written and constructing
hyperslab blocks to pass down to the chunking I/O routine (which only
understand hyperslab I/O requests, not element sequence requests).
This was complicated by the need to align the hyperslabs requested on
dimension boundaries...
Platforms tested:
FreeBSD 4.2. (hawkwind)
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Code cleanup.
Description:
Fixed _lots_ (I mean _tons_) of warnings spit out by the gcc with the
extra warnings. Including a few show-stoppers for compression on IRIX
machines.
Solution:
Changed lots of variables' types to more sensible and consistent types,
more range-checking, more variable typecasts, etc.
Platforms tested:
FreeBSD 4.2 (hawkwind), IRIX64-64 (modi4)
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Small code optimization
Description:
Removed some unnecessary buffer assignments.
Platforms tested:
Solaris 2.6 (baldric)
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Code optimization
Description:
Minor tweaks throughout the optimized regular hyperslab code to increase
speed. This set of improvements increase the benchmark time from taking
~5.46 seconds to ~4.50 seconds, or around a 20% further speedup.
Platforms tested:
Solaris 2.6 (baldric)
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Feature symmetry
Description:
A while ago I needed to get the 'type' of data being accessed during writes
to the VFL driver, so I put in code to get the information down there.
Albert asked for the same information during reads, so I've added that in.
Tested:
FreeBSD 4.1.1 (hawkwind)
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Purpose:
Parallel Bug Fixes
Description:
Was out of sync with header file re-arrangements I checked in last night.
Solution:
Fixed to use new header files, etc.
Platforms tested:
O2K (modi4)
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Maintainance & performance enhancements
Description:
Re-arranged header files to protect private symbols better.
Changed optimized regular hyperslab I/O to compute the offsets more
efficiently from previous method of using matrix operations.
Added sequential I/O operations at a more abstract level (at the same level
as H5F_arr_read/write), to support the optimized hyperslab I/O.
Platforms tested:
Solaris 2.6 (baldric) & FreeBSD 4.1.1 (hawkwind)
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