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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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