482d84b6e5
The expected sequence of events for processing info during object creation
is that if there's an incoming info arg, it is opal_info_dup()ed into the obj
at obj->s_info first. Then interested components register callbacks for
keys they want to know about using opal_infosubscribe_infosubscribe().
Inside info_subscribe_subscribe() the specified callback() is called with
whatever matching k/v is in the object's info, or with the default. The
return string from the callback goes into the new k/v stored in info, and
the input k/v is saved as __IN_<key>/<val>. It's saved the same way
whether the input came from info or whether it was a default. A null return
from the callback indicates an ignored key/val, and no k/v is stored for
it, but an __IN_<key>/<val> is still kept so we still have access to the
original.
At MPI_*_set_info() time, opal_infosubscribe_change_info() is used. That
function calls the registered callbacks for each item in the provided info.
If the callback returns non-null, the info is updated with that k/v, or if
the callback returns null, that key is deleted from info. An __IN_<key>/<val>
is saved either way, and overwrites any previously saved value.
When MPI_*_get_info() is called, opal_info_dup_mpistandard() is used, which
allows relatively easy changes in interpretation of the standard, by looking
at both the <key>/<val> and __IN_<key>/<val> in info. Right now it does
1. includes system extras, eg k/v defaults not expliclty set by the user
2. omits ignored keys
3. shows input values, not callback modifications, eg not the internal values
Currently the callbacks are doing things like
return some_condition ? "true" : "false"
that is, returning static strings that are not to be freed. If the return
strings start becoming more dynamic in the future I don't see how unallocated
strings could support that, so I'd propose a change for the future that
the callback()s registered with info_subscribe_subscribe() do a strdup on
their return, and we change the callers of callback() to free the strings
it returns (there are only two callers).
Rough outline of the smaller changes spread over the less central files:
comm.c
initialize comm->super.s_info to NULL
copy into comm->super.s_info in comm creation calls that provide info
OBJ_RELEASE comm->super.s_info at free time
comm_init.c
initialize comm->super.s_info to NULL
file.c
copy into file->super.s_info if file creation provides info
OBJ_RELEASE file->super.s_info at free time
win.c
copy into win->super.s_info if win creation provides info
OBJ_RELEASE win->super.s_info at free time
comm_get_info.c
file_get_info.c
win_get_info.c
change_info() if there's no info attached (shouldn't happen if callbacks
are registered)
copy the info for the user
The other category of change is generally addressing compiler warnings where
ompi_info_t and opal_info_t were being used a little too interchangably. An
ompi_info_t* contains an opal_info_t*, at &(ompi_info->super)
Also this commit updates the copyrights.
Signed-off-by: Mark Allen <markalle@us.ibm.com>
557 строки
17 KiB
C
557 строки
17 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2017 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2008-2016 University of Houston. All rights reserved.
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* Copyright (c) 2015 Research Organization for Information Science
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* and Technology (RIST). All rights reserved.
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* Copyright (c) 2016 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2016-2017 IBM Corporation. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/info/info.h"
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#include "ompi/file/file.h"
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#include "ompi/mca/io/base/base.h"
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#include "ompi/mca/fs/fs.h"
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#include "ompi/mca/fs/base/base.h"
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#include "ompi/mca/fcoll/fcoll.h"
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#include "ompi/mca/fcoll/base/base.h"
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#include "ompi/mca/fbtl/fbtl.h"
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#include "ompi/mca/fbtl/base/base.h"
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#include "ompi/mca/sharedfp/sharedfp.h"
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#include "ompi/mca/sharedfp/base/base.h"
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#include <unistd.h>
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#include <math.h>
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#include "io_ompio.h"
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#include "ompi/mca/topo/topo.h"
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int mca_io_ompio_file_open (ompi_communicator_t *comm,
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const char *filename,
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int amode,
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opal_info_t *info,
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ompi_file_t *fh)
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{
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int ret = OMPI_SUCCESS;
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mca_io_ompio_data_t *data=NULL;
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bool use_sharedfp = true;
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/* No locking required for file_open according to my understanding
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There is virtually no way on how to reach this point from multiple
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threads simultaniously
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*/
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data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
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if ( NULL == data ) {
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return OMPI_ERR_OUT_OF_RESOURCE;
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}
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/*save pointer back to the file_t structure */
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data->ompio_fh.f_fh = fh;
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/* No lock required for file_open even in multi-threaded scenarios,
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since only one collective operation per communicator
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is allowed anyway */
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ret = mca_common_ompio_file_open(comm,filename,amode,info,&data->ompio_fh,use_sharedfp);
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if ( OMPI_SUCCESS == ret ) {
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fh->f_flags |= OMPIO_FILE_IS_OPEN;
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}
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return ret;
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}
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int mca_io_ompio_file_close (ompi_file_t *fh)
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{
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int ret = OMPI_SUCCESS;
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mca_io_ompio_data_t *data;
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data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
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if ( NULL == data ) {
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/* structure has already been freed, this is an erroneous call to file_close */
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return ret;
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}
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/* No locking required for file_close according to my understanding.
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Multiple threads closing the same file handle at the same time
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is a clear user error.
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*/
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ret = mca_common_ompio_file_close(&data->ompio_fh);
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if ( NULL != data ) {
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free ( data );
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}
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return ret;
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}
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int mca_io_ompio_file_delete (const char *filename,
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struct opal_info_t *info)
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{
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int ret = OMPI_SUCCESS;
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/* No locking required for file_delete according to my understanding.
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One thread will succeed, the other ones silently ignore the
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error that the file is already deleted.
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*/
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ret = unlink(filename);
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if (0 > ret ) {
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if ( ENOENT == errno ) {
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return MPI_ERR_NO_SUCH_FILE;
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} else {
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opal_output (0, "mca_io_ompio_file_delete: Could not remove file %s errno = %d %s\n", filename,
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errno, strerror(errno));
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return MPI_ERR_ACCESS;
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}
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}
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return OMPI_SUCCESS;
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}
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int mca_io_ompio_file_preallocate (ompi_file_t *fh,
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OMPI_MPI_OFFSET_TYPE diskspace)
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{
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int ret = OMPI_SUCCESS, cycles, i;
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OMPI_MPI_OFFSET_TYPE tmp, current_size, size, written, len;
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mca_io_ompio_data_t *data;
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char *buf = NULL;
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ompi_status_public_t *status = NULL;
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data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
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OPAL_THREAD_LOCK(&fh->f_mutex);
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tmp = diskspace;
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ret = data->ompio_fh.f_comm->c_coll->coll_bcast (&tmp,
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1,
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OMPI_OFFSET_DATATYPE,
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OMPIO_ROOT,
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data->ompio_fh.f_comm,
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data->ompio_fh.f_comm->c_coll->coll_bcast_module);
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if ( OMPI_SUCCESS != ret ) {
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_ERROR;
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}
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if (tmp != diskspace) {
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_ERROR;
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}
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ret = data->ompio_fh.f_fs->fs_file_get_size (&data->ompio_fh,
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¤t_size);
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if ( OMPI_SUCCESS != ret ) {
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_ERROR;
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}
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if ( current_size > diskspace ) {
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_SUCCESS;
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}
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/* ROMIO explanation
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On file systems with no preallocation function, we have to
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explicitly write to allocate space. Since there could be holes in the file,
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we need to read up to the current file size, write it back,
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and then write beyond that depending on how much
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preallocation is needed.
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*/
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if (OMPIO_ROOT == data->ompio_fh.f_rank) {
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OMPI_MPI_OFFSET_TYPE prev_offset;
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mca_common_ompio_file_get_position (&data->ompio_fh, &prev_offset );
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size = diskspace;
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if (size > current_size) {
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size = current_size;
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}
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cycles = (size + OMPIO_PREALLOC_MAX_BUF_SIZE - 1)/
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OMPIO_PREALLOC_MAX_BUF_SIZE;
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buf = (char *) malloc (OMPIO_PREALLOC_MAX_BUF_SIZE);
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if (NULL == buf) {
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opal_output(1, "OUT OF MEMORY\n");
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ret = OMPI_ERR_OUT_OF_RESOURCE;
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goto exit;
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}
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written = 0;
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for (i=0; i<cycles; i++) {
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len = OMPIO_PREALLOC_MAX_BUF_SIZE;
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if (len > size-written) {
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len = size - written;
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}
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ret = mca_common_ompio_file_read (&data->ompio_fh, buf, len, MPI_BYTE, status);
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if (ret != OMPI_SUCCESS) {
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goto exit;
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}
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ret = mca_common_ompio_file_write (&data->ompio_fh, buf, len, MPI_BYTE, status);
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if (ret != OMPI_SUCCESS) {
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goto exit;
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}
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written += len;
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}
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if (diskspace > current_size) {
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memset(buf, 0, OMPIO_PREALLOC_MAX_BUF_SIZE);
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size = diskspace - current_size;
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cycles = (size + OMPIO_PREALLOC_MAX_BUF_SIZE - 1) /
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OMPIO_PREALLOC_MAX_BUF_SIZE;
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for (i=0; i<cycles; i++) {
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len = OMPIO_PREALLOC_MAX_BUF_SIZE;
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if (len > diskspace-written) {
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len = diskspace - written;
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}
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ret = mca_common_ompio_file_write (&data->ompio_fh, buf, len, MPI_BYTE, status);
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if (ret != OMPI_SUCCESS) {
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goto exit;
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}
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written += len;
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}
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}
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// This operation should not affect file pointer position.
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mca_common_ompio_set_explicit_offset ( &data->ompio_fh, prev_offset);
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}
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exit:
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free ( buf );
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fh->f_comm->c_coll->coll_bcast ( &ret, 1, MPI_INT, OMPIO_ROOT, fh->f_comm,
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fh->f_comm->c_coll->coll_bcast_module);
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if ( diskspace > current_size ) {
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data->ompio_fh.f_fs->fs_file_set_size (&data->ompio_fh, diskspace);
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}
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return ret;
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}
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int mca_io_ompio_file_set_size (ompi_file_t *fh,
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OMPI_MPI_OFFSET_TYPE size)
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{
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int ret = OMPI_SUCCESS;
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OMPI_MPI_OFFSET_TYPE tmp;
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mca_io_ompio_data_t *data;
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data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
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tmp = size;
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OPAL_THREAD_LOCK(&fh->f_mutex);
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ret = data->ompio_fh.f_comm->c_coll->coll_bcast (&tmp,
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1,
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OMPI_OFFSET_DATATYPE,
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OMPIO_ROOT,
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data->ompio_fh.f_comm,
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data->ompio_fh.f_comm->c_coll->coll_bcast_module);
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if ( OMPI_SUCCESS != ret ) {
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opal_output(1, ",mca_io_ompio_file_set_size: error in bcast\n");
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return ret;
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}
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if (tmp != size) {
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_ERROR;
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}
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ret = data->ompio_fh.f_fs->fs_file_set_size (&data->ompio_fh, size);
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if ( OMPI_SUCCESS != ret ) {
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opal_output(1, ",mca_io_ompio_file_set_size: error in fs->set_size\n");
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return ret;
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}
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ret = data->ompio_fh.f_comm->c_coll->coll_barrier (data->ompio_fh.f_comm,
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data->ompio_fh.f_comm->c_coll->coll_barrier_module);
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if ( OMPI_SUCCESS != ret ) {
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opal_output(1, ",mca_io_ompio_file_set_size: error in barrier\n");
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return ret;
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}
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return ret;
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}
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int mca_io_ompio_file_get_size (ompi_file_t *fh,
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OMPI_MPI_OFFSET_TYPE *size)
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{
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int ret = OMPI_SUCCESS;
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mca_io_ompio_data_t *data;
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data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
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OPAL_THREAD_LOCK(&fh->f_mutex);
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ret = mca_common_ompio_file_get_size(&data->ompio_fh,size);
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return ret;
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}
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int mca_io_ompio_file_get_amode (ompi_file_t *fh,
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int *amode)
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{
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mca_io_ompio_data_t *data;
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data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
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/* No lock necessary in this case, amode is set in file_open, and
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not modified later on*/
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*amode = data->ompio_fh.f_amode;
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return OMPI_SUCCESS;
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}
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int mca_io_ompio_file_get_type_extent (ompi_file_t *fh,
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struct ompi_datatype_t *datatype,
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MPI_Aint *extent)
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{
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opal_datatype_type_extent (&datatype->super, extent);
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return OMPI_SUCCESS;
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}
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int mca_io_ompio_file_set_atomicity (ompi_file_t *fh,
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int flag)
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{
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int tmp;
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mca_io_ompio_data_t *data;
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data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
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OPAL_THREAD_LOCK(&fh->f_mutex);
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if (flag) {
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flag = 1;
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}
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/* check if the atomicity flag is the same on all processes */
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tmp = flag;
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data->ompio_fh.f_comm->c_coll->coll_bcast (&tmp,
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1,
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MPI_INT,
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OMPIO_ROOT,
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data->ompio_fh.f_comm,
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data->ompio_fh.f_comm->c_coll->coll_bcast_module);
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if (tmp != flag) {
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_ERROR;
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}
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data->ompio_fh.f_atomicity = flag;
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_SUCCESS;
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}
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int mca_io_ompio_file_get_atomicity (ompi_file_t *fh,
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int *flag)
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{
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mca_io_ompio_data_t *data;
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data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
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OPAL_THREAD_LOCK(&fh->f_mutex);
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*flag = data->ompio_fh.f_atomicity;
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_SUCCESS;
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}
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int mca_io_ompio_file_sync (ompi_file_t *fh)
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{
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int ret = OMPI_SUCCESS;
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mca_io_ompio_data_t *data;
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data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
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OPAL_THREAD_LOCK(&fh->f_mutex);
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ret = data->ompio_fh.f_fs->fs_file_sync (&data->ompio_fh);
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return ret;
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}
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int mca_io_ompio_file_seek (ompi_file_t *fh,
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OMPI_MPI_OFFSET_TYPE off,
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int whence)
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{
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int ret = OMPI_SUCCESS;
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mca_io_ompio_data_t *data;
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OMPI_MPI_OFFSET_TYPE offset, temp_offset;
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data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
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OPAL_THREAD_LOCK(&fh->f_mutex);
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offset = off * data->ompio_fh.f_etype_size;
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switch(whence) {
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case MPI_SEEK_SET:
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if (offset < 0) {
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_ERROR;
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}
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break;
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case MPI_SEEK_CUR:
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offset += data->ompio_fh.f_position_in_file_view;
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offset += data->ompio_fh.f_disp;
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if (offset < 0) {
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_ERROR;
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}
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break;
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case MPI_SEEK_END:
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ret = data->ompio_fh.f_fs->fs_file_get_size (&data->ompio_fh,
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&temp_offset);
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offset += temp_offset;
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if (offset < 0 || OMPI_SUCCESS != ret) {
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_ERROR;
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}
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break;
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default:
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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return OMPI_ERROR;
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}
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ret = mca_common_ompio_set_explicit_offset (&data->ompio_fh,
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offset/data->ompio_fh.f_etype_size);
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OPAL_THREAD_UNLOCK(&fh->f_mutex);
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|
return ret;
|
|
}
|
|
|
|
int mca_io_ompio_file_get_position (ompi_file_t *fd,
|
|
OMPI_MPI_OFFSET_TYPE *offset)
|
|
{
|
|
int ret=OMPI_SUCCESS;
|
|
mca_io_ompio_data_t *data=NULL;
|
|
mca_io_ompio_file_t *fh=NULL;
|
|
|
|
data = (mca_io_ompio_data_t *) fd->f_io_selected_data;
|
|
fh = &data->ompio_fh;
|
|
|
|
OPAL_THREAD_LOCK(&fd->f_mutex);
|
|
ret = mca_common_ompio_file_get_position (fh, offset);
|
|
OPAL_THREAD_UNLOCK(&fd->f_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
int mca_io_ompio_file_get_byte_offset (ompi_file_t *fh,
|
|
OMPI_MPI_OFFSET_TYPE offset,
|
|
OMPI_MPI_OFFSET_TYPE *disp)
|
|
{
|
|
mca_io_ompio_data_t *data;
|
|
int i, k, index;
|
|
size_t temp_offset;
|
|
|
|
data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
|
|
|
|
OPAL_THREAD_LOCK(&fh->f_mutex);
|
|
temp_offset = data->ompio_fh.f_view_extent *
|
|
(offset*data->ompio_fh.f_etype_size / data->ompio_fh.f_view_size);
|
|
|
|
|
|
i = (offset*data->ompio_fh.f_etype_size) % data->ompio_fh.f_view_size;
|
|
index = 0;
|
|
k = 0;
|
|
|
|
while (1) {
|
|
k = data->ompio_fh.f_decoded_iov[index].iov_len;
|
|
if (i >= k) {
|
|
i -= k;
|
|
index++;
|
|
if ( 0 == i ) {
|
|
k=0;
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
k=i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
*disp = data->ompio_fh.f_disp + temp_offset +
|
|
(OMPI_MPI_OFFSET_TYPE)(intptr_t)data->ompio_fh.f_decoded_iov[index].iov_base + k;
|
|
OPAL_THREAD_UNLOCK(&fh->f_mutex);
|
|
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|
|
int mca_io_ompio_file_seek_shared (ompi_file_t *fp,
|
|
OMPI_MPI_OFFSET_TYPE offset,
|
|
int whence)
|
|
{
|
|
int ret = OMPI_SUCCESS;
|
|
mca_io_ompio_data_t *data;
|
|
mca_io_ompio_file_t *fh;
|
|
mca_sharedfp_base_module_t * shared_fp_base_module;
|
|
|
|
data = (mca_io_ompio_data_t *) fp->f_io_selected_data;
|
|
fh = &data->ompio_fh;
|
|
|
|
/*get the shared fp module associated with this file*/
|
|
shared_fp_base_module = fh->f_sharedfp;
|
|
if ( NULL == shared_fp_base_module ){
|
|
opal_output(0, "No shared file pointer component found for this communicator. Can not execute\n");
|
|
return OMPI_ERROR;
|
|
}
|
|
|
|
OPAL_THREAD_LOCK(&fp->f_mutex);
|
|
ret = shared_fp_base_module->sharedfp_seek(fh,offset,whence);
|
|
OPAL_THREAD_UNLOCK(&fp->f_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
int mca_io_ompio_file_get_position_shared (ompi_file_t *fp,
|
|
OMPI_MPI_OFFSET_TYPE * offset)
|
|
{
|
|
int ret = OMPI_SUCCESS;
|
|
mca_io_ompio_data_t *data;
|
|
mca_io_ompio_file_t *fh;
|
|
mca_sharedfp_base_module_t * shared_fp_base_module;
|
|
|
|
data = (mca_io_ompio_data_t *) fp->f_io_selected_data;
|
|
fh = &data->ompio_fh;
|
|
|
|
/*get the shared fp module associated with this file*/
|
|
shared_fp_base_module = fh->f_sharedfp;
|
|
if ( NULL == shared_fp_base_module ){
|
|
opal_output(0, "No shared file pointer component found for this communicator. Can not execute\n");
|
|
return OMPI_ERROR;
|
|
}
|
|
OPAL_THREAD_LOCK(&fp->f_mutex);
|
|
ret = shared_fp_base_module->sharedfp_get_position(fh,offset);
|
|
*offset = *offset / fh->f_etype_size;
|
|
OPAL_THREAD_UNLOCK(&fp->f_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|