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Code Update
Description:
Ported change from the 1.5 branch to the 1.4 branch where all HDF5
include files are in quotes instead of angle brackets:
#include "hdf5_file.h"
instead of
#include <hdf5_file.h>
Platforms tested:
Linux
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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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Bug Fix.
Description:
Setting a non-zero userblock size was causing raw data caching code to
break.
Solution:
Changed from using absolute end-of-address-space offsets in cache size
calculations to relative offsets.
Platforms tested:
FreeBSD 4.3 (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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Clean up code.
Description:
Cleaned up various compiler warnings.
Platforms tested:
FreeBSD 4.2 (hawkwind)
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Small code optimization
Description:
Removed some unnecessary buffer assignments.
Platforms tested:
Solaris 2.6 (baldric)
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Bug Fix
Description:
Some of the HRETURN types were incorrect. They were NULL when
they should have been FAIL.
Solution:
Changed the NULLs to FAILs.
Platforms tested:
Linux
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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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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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Bug Fix
Description:
Use H5FD_get_eoa instead of H5FD_get_eof to check for reading off the end
of the allocated file space. Using H5FD_get_eof was causing the Stream
VFD to fail.
Solution:
Switched from using H5FD_get_eof to H5FD_get_eoa
Platforms tested:
FreeBSD 4.1.1 (hawkwind)
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Rearrange code
Description:
The data sieve buffering code for contiguously stored datasets was
wedged in the H5F_arr_read/H5F_arr_write routines.
Solution:
Created a new H5Fcontig.c to hold I/O routines for contiguously stored
datasets (like H5Fistore.c for chunked dataset I/O routines) and moved
data sieving code into those routines.
Platforms tested:
Solaris 2.6 (i.e. baldric)
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