| Commit message (Collapse) | Author | Age | Files | Lines |
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Code cleanup
Description:
Change most (all?) HRETURN_ERROR macros to HGOTO_ERROR macros, along with
HRETURN macros to HGOTO_DONE macros. This unifies the error return path
from functions and reduces the size of the library by up to 10% on some
platforms.
Additionally, I improved a lot of the error cleanup code in many routines.
Platforms tested:
FreeBSD 4.6 (sleipnir) serial & parallel and IRIX64 6.5 (modi4) serial &
parallel.
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Bug Fix
Description:
It was possible to create corrupted metadata information (either in memory
or in the file or both) with a parallel I/O program because of the way
metadata writes were being handled for writes out of the metadata cache.
Solution:
Added a dataset transfer property called "block before metadata write"
which is used by the MPI-I/O and MPI-posix drivers to sync up all the
processes before attempting a metadata write. This property is currently
only for metadata writes from the metadata cache.
Platforms tested:
IRIX64 6.5 (modi4) w/parallel
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New feature.
Description:
Added MPI-posix VFL driver. This driver uses MPI to coordinate actions, but
performs I/O directly with posix sec(2) I/O functions. This driver should
_NOT_ be used if the file accessed is not on a parallel filesystem.
Platforms tested:
FreeBSD 4.6 (sleipnir) w/parallel & IRIX64 6.5 (modi4) w/parallel
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Bug Fix
Description:
When parallel I/O is used, the MPI-I/O VFL driver uses a "lazy" model to
call MPI_File_set_view() in order to reduce the number of calls to this
function. However, this is unsafe, because if a collective I/O which uses
MPI derived types (and thus uses MPI_File_set_view()) is immediately
followed by an independent I/O, the code will attempt to call
MPI_File_set_view() in order to switch back to the default view of the
file. MPI_File_set_view() is a collective call however, and this causes
the application to hang.
Solution:
Removed "lazy" MPI_File_set_view() code, instead set the file view when it
is needed (with MPI derived types) and immediately set the file view back to
the default view before leaving the I/O routine.
Platforms tested:
IRIX64 6.5 (modi4) w/parallel. Also, tested with the latest development
and release code for the SAF library, which now works correctly with this
change. (Although the release branch of the SAF library seems to have a
bug, this 1.4.4 release candidate code gets as far as the version the SAF
library is released on top of (1.4.2-patch1, I believe)).
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Code improvement
Description:
Some small code cleanups and took out the code the was turning off the
metadata cache for parallel I/O (!)
Platforms tested:
IRIX64 6.5 (modi4) w/parallel
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Code cleanup
Description:
Removed more compiler warnings, etc.
Platforms tested:
Linux 2.2.x (eirene) w/parallel
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Code cleanup
Description:
Turn on more warnings in the IRIX builds and clean them up.
Platforms tested:
IRIX64 6.5 (modi4) w/parallel
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Code optimization
Description:
Avoid creating MPI types (and thus requiring a MPI_File_set_view() call)
when contiguous selections are used for dataset I/O. This should be a
performance improvement for those sorts of selections.
Platforms tested:
Linux 2.2.x (eirene) w/parallel && IRIX64 6.5 (modi4) w/parallel & FORTRAN
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Code cleanup
Description:
Use dataset transfer property list to hold information about the MPI types
for the current transfer, instead of setting pseudo-global variables in
the file's struct.
Platforms tested:
Linux 2.2.x (eirene) w/parallel & IRIX64 6.5 (modi4) w/parallel & FORTRAN
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Code cleanup
Description:
Change MPI-I/O code to use the address of the dataset for the displacement,
instead of having a separate displacement value. Removed displacement
parameter from H5FD_mpio_setup parameters.
Platforms tested:
Linux 2.2.x (eirene) w/parallel & IRIX64 6.5 (modi4) w/parallel.
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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
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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++
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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)
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Code cleanup
Description:
Broke the FUNC_ENTER macro into several macros, with more specialized
uses (which followup mail will describe). This was designed to move
most/all of the checks which could be done at compile time to that point,
instead of needlessly performing them (over & over :-) at run-time.
This reduces the library's size (and thus staticly linked binaries) and
has a minor speedup effect also.
Platforms tested:
IRIX64 6.5 (modi4) with parallel & FORTRAN enabled, and additional testing
on FreeBSD and Solaris immediately after the checkin.
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Code cleanup.
Description:
Took Robb's recent ideas for improving the FUNC_ENTER/FUNC_LEAVE macros
equivalents in the SAF library and adapted them to our library. I added
an additional macro which is equivalent to FUNC_ENTER:
FUNC_ENTER_NOINIT - Has the API tracing code, etc. from FUNC_ENTER but
none of the library or interface initialization code. This is to
be used _only_ for static functions and those which explicitly
cannot have the library or interface initialization code enabled
(like the API termination routines, etc.).
This allowed many more of the functions in the library [but not all yet :-(]
to be wrapped with FUNC_ENTER[_NOINIT]/FUNC_LEAVE pairs.
It also reduced the size of the library and executables (by cutting out a
bunch of code which was never executed), I'll e-mail the exact results when
I've finished editing it.
Platforms tested:
IRIX64 6.5 (modi4)
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Code cleanup
Description:
Guard against getting into metadata broadcast in write routine and clean
up some error handling.
Platforms tested:
IRIX64 6.5 (modi4)
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New feature
Description:
Add 'closing' parameter to H5FDflush and VFL "flush" functions, per
http://hdf.ncsa.uiuc.edu/RFC/VFLFlush/VFLFlush.html
Platforms tested:
IRIX64 6.5 (modi4)
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Bug fix/Code improvement.
Description:
Currently, the chunk data allocation routine invoked to allocate space for
the entire dataset is inefficient. It writes out each chunk in the dataset,
whether it is already allocated or not. Additionally, this happens not
only when it is created, but also anytime it is opened for writing, or the
dataset is extended. Worse, there's too much parallel I/O syncronization,
which slows things down even more.
Solution:
Only attempt to write out chunks that don't already exist. Additionally,
share the I/O writing between all the nodes, instead of writing everything
with process 0. Then, only block with MPI_Barrier if chunks were actually
created.
Platforms tested:
IRIX64 6.5 (modi4)
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Bug fix.
Description:
Added barrier to flush routine to prevent race condition where file could
be truncated.
Platforms tested:
IRIX64 6.5 (modi4)
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Code cleanup/Performance enhancement
Description:
The code to extend the file size in H5FD_mpio_flush is getting run even when
the file size doesn't change. Also, it's sort of sidestepping MPI-I/O when
extending the file, instead of using MPI-I/O features to set the file's size.
Solution:
Only extend the file's size when the allocated size has increased. Also
use MPI_File_set_size() to change the file's size.
Platforms tested:
IRIX64 6.5 (modi4)
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Bug fix
Description:
Calling MPI_Get_count needs to be done with the same MPI type as was used
for the transfer and we are always using MPI_BYTE, even when a different
MPI type was used for the transfer.
Solution:
Only query MPI_Get_count with MPI_BYTE when we really used MPI_BYTE for the
transfer. Wait for later to query MPI_Get_count with other MPI types.
Platforms tested:
IRIX64 6.5 (modi4)
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Performance enhancement
Description:
Doing an MPI_File_sync() just before a file is closed causing a large
performance loss.
Solution:
Add flag to MPI file driver to avoid performance the MPI_File_sync() when
the flag is set before a call to H5F_flush().
Platforms tested:
IRIX64 6.5 (modi4)
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Back out changes.
Description:
Back out changes to VFL 'flush' API function, pending review.
Platforms tested:
IRIX64 6.5 (modi4)
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New Feature
Description:
The VFL flush function is called immediately before a file is closed.
This can cause duplicate syncronization actions to occur, if the VFL
close function also performs them.
Solution:
Added 'closing' parameter to VFL 'flush' operation. This allows the VFL
flush function to bypass operations that will be duplicated within the VFL
close function.
Additionally, use the 'closing' parameter to bypass calls to MPI_File_sync()
when set. Since MPI_File_close() also syncronizes the file, this avoids
the terrible performance hit taken when calling MPI_File_sync() as the file
is closing.
Platforms tested:
IRIX64 6.5 (modi4)
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Code cleanup
Description:
The parallel I/O file driver is optimized to only write metadata with one
process (and broadcast the results to the other processes). This is
currently enabled by a separate call to H5FD_mpio_tas_allsame() before
each metadata write to the file. This can easily lead to problems where
the prelude function call is omitted before the actual write code or, in
a threaded environment, lead to race condititions where the value set is
reset before being used.
Solution:
Since we only want to write metadata from one process, key off of the 'type'
parameter (which has information about whether the data being written it
metadata or raw data) to H5FD_mpio_write() as the method for determining
whether to only write from one process or not.
Platforms tested:
IRIX64 6.5 (modi4)
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New Feature
Description:
Currently, only process 0 writes metadata to disk, leading to a potential
performance bottleneck as the other processors wait for it to catch up.
Solution:
Rotate the metadata responsibilities among all processes, speading out the
work.
Platforms tested:
IRIX64 6.5 (modi4)
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Small code cleanup/improvement
Description:
Query the MPI rank only once and store it in the file structure for each
process.
Platforms tested:
IRIX64 6.5 (modi4)
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Features.
Description:
Error stack used to report only hdf5 predefined error messages
because it takes only static strings. Runtime defined messages
were not pushed to the stack.
Added the means and macros to push MPI error strings onto the
hdf5 error stack. Added a new minor error class as H5E_MPIERR
for this class of messages.
H5Epulbic.h, H5E.c:
Added H5E_MPIERR and its minor class description.
H5Eprivate.h:
Added HMPI_XXX macros to push MPI error strings to the stack.
H5FDmpio.c:
Changed couple places to use the new macros to test the new
macros. A more through changes to make use of these new
macros will be done later.
Platforms tested:
eirene (serial, parallel)
modi4(parallel)
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Purpose:
Bug Fix
Description:
Committing the changes in the MPI/IO stuff so that parallel HDF5
will work on HP-UX. It seems that on HP-UX, the MPI_Status variable
needs to be initialized to 0 for it to work (i.e., in some other MPI
calls, if there's garbage in the MPI_Status variable, then it will
barf).
Solution:
Initialized to 0.
Platforms tested:
HP-UX parallel, Linux.
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Purpose:
Modify H5Fclose behavior
Description:
The HDF5 actual file close behaves in several ways in terms of if there
are still objects(dataset, group, datatype) opened in file.
Solution:
Added a new file access property, file close degree. It has four values,
H5F_CLOSE_DEFAULT
H5F_CLOSE_WEAK
H5F_CLOSE_SEMI
H5F_CLOSE_STRONG
The way a file is closed is decided by these values.
Platforms tested:
IRIX64 6.5, SunOS 5.6, FreeBSD 4.4
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Bug fix
Description:
A couple more compile problems from the recent elimination of IDs from
internal function calls.
Platforms tested:
IRIX64 6.5 (modi4)
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Code cleanup
Description:
Get rid of IDs from internal function calls and some small cleanups from
the old-stype => generic property list conversion.
Platforms tested:
FreeBSD 4.4 (hawkwind)
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Code cleanup
Description:
Clean up various compiler warnings from generic property updates.
Platforms tested:
FreeBSD 4.4 (hawkwind)
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Purpose:
Followup file access property list changes.
Platforms tested:
IRIX64, SunOS 5.7, FreeBSD.
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Purpose:
Generic Property List Change
Description:
Changed file access list to the new generic list.
Platforms tested:
IRIX64, SunOS5.7, FreeBSD
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Fix on Kludge
Description:
Forgot another chunk of parallel I/O code that needed to change for the
generic property list kludge... :-/
Platforms tested:
Parallel Linux 2.2.18smp (eirene)
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bug fix
Description:
H5FD_mpio_flush() would try to file seek negative if the
file->eoa is 0 (e.g., doing mpio on the raw-file of the
split file driver). Put in a code to catch this case
by returning succeed immediately.
Platforms tested:
modi4(pp)
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Code cleanup (sorta)
Description:
When the first versions of the HDF5 library were designed, I remembered
vividly the difficulties of porting code from a 32-bit platform to a 16-bit
platform and asked that people use intn & uintn instead of int & unsigned
int, respectively. However, in hindsight, this was overkill and
unnecessary since we weren't going to be porting the HDF5 library to
16-bit architectures.
Currently, the extra uintn & intn typedefs are causing problems for users
who'd like to include both the HDF5 and HDF4 header files in one source
module (like Kent's h4toh5 library).
Solution:
Changed the uintn & intn's to unsigned and int's respectively.
Platforms tested:
FreeBSD 4.4 (hawkwind)
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More code cleanups
Description:
Wrap up the code cleanups for changing the dataset transfer property lists
over to using the generic property list code.
Platforms tested:
IRIX64 6.5 (modi4)
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Bug Fix, Code Cleanup, Code Optimization, etc.
Description:
Fold in the hyperslab speedups, clean up compile warnings and change a
few things from using 'unsigned' or 'hsize_t' to use 'size_t' instead.
Platforms tested:
FreeBSD 4.3 (hawkwind), Solaris 2.7 (arabica), Irix64 6.5 (modi4)
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Replace Kludge with Another Kludge
Description:
The MPI_Get_count function isn't found on most systems. We need to
replace this with a configure call which checks and defines the macro
H5_HAVE_MPI_GET_COUNT or something.
Solution:
If-def'ed out the code for everyone (since H5_HAVE_MPI_GET_COUNT is
never defined anywhere).
Platforms tested:
SDSC HP N9000
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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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Typo fix and comment
Description:
The FUNC_ENTER of H5FD_mpio_flush had a wrong function name. Corrected
it. Also filled in the missing original author name.
Added a 'this is collective.' to all collective functions.
Platforms tested:
It was just editing. Can't go wrong. :-)
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2000-12-29 13:26:28 Robb Matzke <matzke@llnl.gov>
* H5FD_mpio_write: Avoid MPI_Get_count() when using the LAM implementation of MPI.
This code must have other problems anyway because Kim
Yates has a similar kludge in place to avoid negative
return values from the same function.
2000-12-29 13:25:30 Robb Matzke <matzke@llnl.gov>
* H5FD_mpio_read: Avoid MPI_Get_count() when using the LAM implementation of MPI.
This code must have other problems anyway because Kim
Yates has a similar kludge in place to avoid negative
return values from the same function.
2000-12-29 11:28:13 Robb Matzke <matzke@llnl.gov>
* H5FD_mpio_flush: Read and rewrite the last allocated byte of the file to insure
that EOF>=EOA.
2000-12-29 09:32:49 Robb Matzke <matzke@llnl.gov>
* H5FD_mpio_write: Removed unused variable.
2000-12-29 09:32:15 Robb Matzke <matzke@llnl.gov>
* H5FD_mpio_write: Fixed a failure return value that should have been FAIL instead
of NULL.
2000-12-29 09:31:47 Robb Matzke <matzke@llnl.gov>
* H5FD_mpio_read: Removed unused variable.
2000-12-28 16:09:31 Robb Matzke <matzke@llnl.gov>
* H5FD_mpio_query: The `flags' argument is advertised to be output only. Therefore I
added code to zero its value before the feature bits
are assigned.
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Bug fix
Description:
In H5FD_mpio_open, there was a mem-xfree of the file variable
before it ever gets alloc'ed. This is inside a failure condition
that rarely happened. But if it happens, it would be freeing
a null pointer.
Solution:
Removed the error code.
Platforms tested:
Modi4 -64 parallel. (Everything still works. :-)
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Bug fix
Description:
When the v1.2 compatibility code was turned on, internal functions in the
library were getting confused.
Solution:
Separated guts of H5Pget_driver call into an API function (the definition
of which depends on the compatibility switch) and an internal function
which always behaves like the v1.3/4 function. Replaced API function calls
in the library code with the internal function.
Platforms tested:
FreeBSD 4.2 (hawkwind)
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Backward compatibility code
Description:
Add in code to allow the library to emulate the v1.2 API and behavior.
Platforms tested:
FreeBSD 4.2 (hawkwind)
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Bug fix
Description:
The optimized MPIO code was not working with the TFLOPS machine.
It kept reporting "can't convert from size to size_i" errors in
H5FD_mpio_write() and H5FD_mpio_read().
Solution:
The error was actually in H5S_mpio_spaces_xfer() in H5Smpio.c
in which the variable mpi_count was declared as size_t (only
4 bytes big in TFLOPS) when it should be hsize_t (8 bytes big in TFLOPS).
Corrected and also changed to use the (hsize_t) to case size_i in
H5FD_mpio_write() and H5FD_mpio_read() since that is what it should
be.
Platforms tested:
TFLOPS and modi4 (-64, parallel)
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Purpose:
Bug fix.
Description:
The names of some entries did not correspond with the names in the
FUNC_ENTER macro. This would cause inaccuracies during Pablo tracing.
Solution:
The names were changed in FUNC_ENTER to agree with the entry names.
Platforms tested:
Solaris, Irix, AIX, HP Vclass
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Purpose:
Bug fix
Description:
H5FD_close() wiped clean the public information before
closing the FD. This caused problem to the lower level
close() which wants to verify it has indeed handed a valid
file-driver to close because that information is wiped out
prematurely.
Solution:
Moved the public information part cleaning after it is closed.
H5FDmpio.c:
Added in a bunch of assertion to make sure the file handle is indeed
an MPIO file.
Platforms tested:
IRIX64 -64 parallel
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