Bug fix
Description:
I/O on "Regular" hyperslab selections could fail to transfer correctly
if the number of elements in the selection's row did now fit "evenly"
into the buffer being used for the transfer.
Solution:
Correct the calculation of the block & count offsets within the optimized
"regular" hyperslab routines.
Platforms tested:
FreeBSD 4.5 (sleipnir)
Code cleanup
Description:
The test for inserting a compound datatype into itself (which should fail)
is issuing warnings about this failure.
Solution:
Turn the warnings off during this test.
Platforms tested:
FreeBSD 4.5 (sleipnir)
Purpose:
Bug #774 fix
Description:
Added a test for the H5Tenum_nameof and H5Tenum_valueof functions.
Values that do not exists in the enumeration type are supplied to
the functions; functions should fail instead of succeeding.
Platforms tested:
Solaris 2.7 and Linux 2.2.18
Purpose:
Bug #774 fix
Description:
H5Tenum_valueof and H5Tenum_nameof functions did not fail
when non-existing name or non-existing value were supplied.
This happened because binary search algorithm did not check
if value or name found during the search were equal to the supplied
one.
Solution:
Added an appropriate check condition.
Platforms tested:
Solaris 2.7 and Linux 2.2.18
Update
Description:
Explained that, if the user uses the "make install prefix=NEW_DIR"
option, they'll need to modify the installed h5cc file to reflect the
change.
Bug Fix
Description:
The test for compression needed to be reversed.
Solution:
Instead of "!(defined...) used just "(defined..."
Platforms tested:
Modi4
Bug fix.
Description:
H5P_get was reading a 'hsize_t' field into a 'size_t' variable, causing
problems on the HP's and Windows.
Solution:
Changed the variable to be an hsize_t
Platforms tested:
HP/UX 11.0 (kelgia)
Bug Fix
Description:
H5Dcreate and H5Tcommit allow "empty" compound and enumerated types (i.e.
ones with no members) to be stored in the file, but this causes an assertion
failure and is somewhat vapid.
Solution:
Check the datatype "makes sense" before using it for H5Dcreate and
H5Tcommit.
Platforms tested:
FreeBSD 4.5 (sleipnir)
Purpose:
update windows project
Description:
H5Tinit.c is manually maintained on w2k, FUNC_ENTER and FUNC_LEAVE need to be consistent with the
rest changes of library.
Solution:
Platforms tested:
w2000(many tests failed not due to the check-in, somewhere at H5P.c is not working correctly)
Bug Fix
Description:
On AIX machines, the number of script interpreters which ran the
testh5dump.sh script would strip too many of the quotes away, causing
problems if you're quoting something with a space in it.
Solution:
Just got rid of the spaces and used ',' instead.
Platforms tested:
AIX and Linux
Bug Fix
Description:
Not all platforms have zlib. This shouldn't be compiled then.
Solution:
ifdef-ed the code out if the zlib wasn't specified.
Platforms tested:
Linux
Bug fix (#620)
Description:
Change slightly misleading error message when creating attribute with same
name as existing attribute to something a bit more clear.
Platforms tested:
FreeBSD 4.5 (sleipnir)
Bug Fix (#709)/Code improvement.
Description:
Allow chunks for chunked datasets to be cached when file is open for
read-only access.
Platforms tested:
IRIX64 6.5 (modi4) w/parallel
Bug fix (bug #777)
Description:
Current code allows a compound datatype to be inserted into itself.
Solution:
Check if the ID for the member is the same as the ID for the compound
datatype and reject it if so.
Platforms tested:
FreeBSD 4.5 (sleipnir)
Bug fix (bug #777)
Description:
Current code allows a compound datatype to be inserted into itself.
Solution:
Check if the ID for the member is the same as the ID for the compound
datatype and reject it if so.
Platforms tested:
FreeBSD 4.5 (sleipnir)
New Feature
Description:
Add H5P[set|get]_small_data_block_size API function, per our discussions at
last week's HDF5 meeting.
Platforms tested:
FreeBSD 4.5 (sleipnir)
Bug Fix for bug #789
Description:
Creating a 1-D dataset region reference caused the library to hang (go into
an infinite loop).
Solution:
Corrected algorithm for serializing hyperslab regions.
Platforms tested:
FreeBSD 4.5 (sleipnir)
Feature Update
Description:
It now writes an uncompressed version of the file out. The first
tests didn't look all that wonderful. Here is a typical output:
Buffer size == 1MB
Uncompressed Write Time: 0.55s
Uncompressed Write Throughput: 116.00MB/s
Compressed Write Time: 8.76s
Compressed Write Throughput: 7.31MB/s
Platforms tested:
Linux
Compress I/O Test Add
Description:
This is the initial check-in of the compress I/O test. It will write
out compressed buffers to a file.
I need to implement a write of uncompressed data first for
comparison...
Platforms tested:
Linux
Bug fix.
Description:
Added extra check to locations where metadata and "small data" blocks were
being returned to the file's list of free space to avoid freeing 0-sized
blocks. This should fix the problems in last night's daily tests.
Platforms tested:
FreeBSD 4.5 (sleipnir)
Code Improvement
Description:
Split the metadata accumulator code into two parts: one for allowing writes
of the accumulator buffer during reads (when the buffer is dirty and needs
to be flushed to disk in order to hold the new metadata being read in) and
another for only allowing writes of the buffer during writes.
This allows the MPI-I/O VFL driver to use the metadata accumulator (but
only during writes) and benefit from the reduced number of metadata I/O
operations that it brings.
Platforms tested:
IRIX64 6.5 (modi4) w/parallel
Bug fix.
Description:
Return H5S_all_opt_possible() prototype to original position in H5Spkg.h,
it is not related to parallel I/O.
Platforms tested:
FreeBSD 4.5 (sleipnir)
Code cleanup/bug fix
Description:
Unused space in the file was being "dropped on the floor" when the metadata
or "small data" block was moved to a new location in the file and there was
unused space in the old block.
Solution:
Put the space left in the allocation block into the free list of space for
the file. This allows it to be [potentially] reused and sometimes allows
the file to be smaller.
Platforms tested:
Solaris 2.7 (arabica) w/FORTRAN and FreeBSD 4.5 (sleipnir) w/C++
Code improvement.
Description:
Added boot block and driver info block checksumming feature to the shared
file information. This prevents these blocks from being written out
multiple times when they haven't changed.
This reduces the number of I/O operations which hit the disk for my test
program from 15 to 14 (i.e. from 393 to 14, overall).
Platforms tested:
Solaris 2.7 (arabica) w/FORTRAN and FreeBSD 4.5 (sleipnir) w/C++
New feature.
Description:
Added a "small data" block allocation mechanism to the library, similar to
the mechanism used for allocating metadata currently.
See the RFC for more details:
http://hdf.ncsa.uiuc.edu/RFC/SmallData/SmallData.html
This reduces the number of I/O operations which hit the disk for my test
program from 19 to 15 (i.e. from 393 to 15, overall).
Platforms tested:
Solaris 2.7 (arabica) w/FORTRAN and FreeBSD 4.5 (sleipnir) w/C++
Feature Add
Description:
Added support for testing only the "write" operations. Use the "-w"
or "--write-only" flags for this.
Platforms tested:
Linux (parallel) & Modi4 (parallel)
Code Cleanup
Description:
Removed some compiler warnings.
Solution:
In a few cases, NULL was being returned when a FAIL was supposed to
be returned instead. There were some header files which needed to be
included in a few of the sources. A couple of if-then statements had
assignments in the conditional part. The compiler warned that they
should have extra "()"s around them. Made the code check the values
instead.
Platforms tested:
Linux (parallel) Modi4 (parallel)
Code improvement
Description:
Now that the metadata accumulator is working correctly, the buffer size
tends to get rather large and stay there.
Solution:
Put a throttle on the accumulator buffer to reduce its size back down when
it isn't needed.
Platforms tested:
Solaris 2.7 (arabica) w/FORTRAN & FreeBSD 4.5 (sleipnir) w/C++
Purpose:
Bug fix (#699), fix provided by a user, approved by Quincey
Description:
When a scalar dataspace was written to the file and then
subsequently queried with the H5Sget_simple_extent_type function,
type was reported H5S_SIMPLE instead of H5S_SCALAR.
Solution:
Applied a fix (see bug report 699) and modified out test program
to exercise the case.
Platforms tested:
Solaris 2.7 and Linux 2.2.18
Purpose:
Bug fix (#699), fix provided by a user, approved by Quincey
Description:
When a scalar dataspace was written to the file and then
subsequently queried with the H5Sget_simple_extent_type function,
type was reported H5S_SIMPLE instead of H5S_SCALAR.
Solution:
Applied a fix (see bug report 699)
Platforms tested:
Solaris 2.7 and Linux 2.2.18
Code improvement
Description:
The metadata aggregation code in the library was not terribly smart about
extending contiguous regions of metadata in the file and would not extend
them as far as possible. This causes space in the file to be wasted, also.
Solution:
Be smarter about extending the space used in the file for metadata by
checking whether new metadata blocks allocated in the file are at the end
of the current metadata aggregation region and append them to the metadata
region if so. This has the nice side benefit of reducing the number of
bytes we waste in the file and reducing the size of the file by a small
amount in some cases.
This reduces the number of I/O operations which hit the disk for my test
program from 53 to 19 (i.e. from 393 to 19, overall).
Platforms tested:
Solaris 2.7 (arabica) w/FORTRAN and FreeBSD 4.5 (sleipnir) w/C++
Bug Fix
Description:
The "dirty" flag for symbol table entries and symbol table nodes was not
being cleared when they were flushed to the file, causing lots of extra
metadata I/O.
Solution:
Reset the symbol table entry & nodes' flags when thy are flushed to disk.
This reduces the number of I/O operations which hit the disk for my test
program from 83 to 53 (i.e. from 393 to 53, overall).
Platforms tested:
Solaris 2.7 (arabica) w/FORTRAN & FreeBSD 4.5 (sleipnir) w/C++
Tidy up
Description:
Old version showed tons of output even if MPI_Offset is too small
to support multiple GB sized files and destined to fail.
Output is pretty confusing.
Solution:
Prints the signness and size of MPI_Offset for information.
Skipped tests if MPI_Offset is not big enough to support the file
sizes.
Platforms tested:
modi4, eirene, burrwhite (all parallel).
Bug Fix
Description:
There was an error in the way it was determining if there were any
reads to report.
Solution:
Wrote a subroutine which would determine if the reads are defined in
the structure before trying to print them out.
Platforms tested:
Linux
Add Report Generator
Description:
This is a generator for ASCII and Excel(tm)(c) reports generated by
the pio_perf benchmark we run. There are instructions at the top of
the file on how to run the program and the input format it expects,
etc.
Platforms tested:
Linux
Code cleanup/bug fix
Description:
The "metadata accumulator" cache in the library (which is designed to catch
small metadata writes/reads and bundle them together into larger I/O
buffers) was incorrectly detecting the important case of metadata pieces
being written sequentially to the file, adjoining but not overlapping.
Additionally, the metadata accumulator was not being used to cache data
read in from disk, only caching writes.
Solution:
Fix accumulator to correctly cache adjoining metadata writes and also to
cache metadata read from disk.
Between these two fixes, the number of I/O requests which resulted in actual
reads/writes to the filesystem dropped from 393 requests to 82 for the
particular test I was using. :-)
Platforms tested:
Solaris 2.7 (arabica) w/FORTRAN & FreeBSD 4.5 (sleipnir) w/C++
