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openmpi/ompi/win/win.h
Mark Allen 482d84b6e5 fixes for Dave's get/set info code 
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>
2017-05-17 01:12:49 -04:00

181 строка
5.9 KiB
C
Исходник Ответственный История

/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2007 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2006-2012 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2013-2015 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2016-2017 IBM Corporation. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#ifndef OMPI_WIN_H
#define OMPI_WIN_H
#include "ompi_config.h"
#include "mpi.h"
#include "opal/class/opal_object.h"
#include "opal/class/opal_hash_table.h"
#include "opal/util/info_subscriber.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/info/info.h"
#include "ompi/communicator/communicator.h"
#include "ompi/group/group.h"
#include "ompi/mca/osc/osc.h"
BEGIN_C_DECLS
/* flags */
#define OMPI_WIN_FREED 0x00000001
#define OMPI_WIN_INVALID 0x00000002
#define OMPI_WIN_NO_LOCKS 0x00000004
#define OMPI_WIN_SAME_DISP 0x00000008
#define OMPI_WIN_SAME_SIZE 0x00000010
enum ompi_win_accumulate_ops_t {
OMPI_WIN_ACCUMULATE_OPS_SAME_OP_NO_OP,
OMPI_WIN_ACCUMULATE_OPS_SAME_OP,
};
typedef enum ompi_win_accumulate_ops_t ompi_win_accumulate_ops_t;
/**
* Accumulate ordering flags. The default accumulate ordering in
* MPI-3.1 is rar,war,raw,waw.
*/
enum ompi_win_accumulate_order_flags_t {
/** no accumulate ordering (may valid with any other flag) */
OMPI_WIN_ACC_ORDER_NONE = 0x01,
/** read-after-read ordering */
OMPI_WIN_ACC_ORDER_RAR = 0x02,
/** write-after-read ordering */
OMPI_WIN_ACC_ORDER_WAR = 0x04,
/** read-after-write ordering */
OMPI_WIN_ACC_ORDER_RAW = 0x08,
/** write-after-write ordering */
OMPI_WIN_ACC_ORDER_WAW = 0x10,
};
OMPI_DECLSPEC extern mca_base_var_enum_t *ompi_win_accumulate_ops;
OMPI_DECLSPEC extern mca_base_var_enum_flag_t *ompi_win_accumulate_order;
OMPI_DECLSPEC extern opal_pointer_array_t ompi_mpi_windows;
struct ompi_win_t {
opal_infosubscriber_t super;
opal_mutex_t w_lock;
char w_name[MPI_MAX_OBJECT_NAME];
/* Group associated with this window. */
ompi_group_t *w_group;
/* Information about the state of the window. */
uint16_t w_flags;
/** Window flavor */
uint16_t w_flavor;
/** Accumulate ops */
ompi_win_accumulate_ops_t w_acc_ops;
/* Attributes */
opal_hash_table_t *w_keyhash;
/* index in Fortran <-> C translation array */
int w_f_to_c_index;
/* Error handling. This field does not have the "w_" prefix so
that the OMPI_ERRHDL_* macros can find it, regardless of
whether it's a comm, window, or file. */
ompi_errhandler_t *error_handler;
ompi_errhandler_type_t errhandler_type;
/* one sided interface */
ompi_osc_base_module_t *w_osc_module;
/** Accumulate ordering (see ompi_win_accumulate_order_flags_t above) */
int32_t w_acc_order;
};
typedef struct ompi_win_t ompi_win_t;
OMPI_DECLSPEC OBJ_CLASS_DECLARATION(ompi_win_t);
/**
* Padded struct to maintain back compatibiltiy.
* See ompi/communicator/communicator.h comments with struct ompi_communicator_t
* for full explanation why we chose the following padding construct for predefines.
*/
#define PREDEFINED_WIN_PAD (sizeof(void*) * 64)
struct ompi_predefined_win_t {
struct ompi_win_t win;
char padding[PREDEFINED_WIN_PAD - sizeof(ompi_win_t)];
};
typedef struct ompi_predefined_win_t ompi_predefined_win_t;
OMPI_DECLSPEC extern ompi_predefined_win_t ompi_mpi_win_null;
OMPI_DECLSPEC extern ompi_predefined_win_t *ompi_mpi_win_null_addr;
int ompi_win_init(void);
int ompi_win_finalize(void);
int ompi_win_create(void *base, size_t size, int disp_unit,
ompi_communicator_t *comm, opal_info_t *info,
ompi_win_t **newwin);
int ompi_win_allocate(size_t size, int disp_unit, opal_info_t *info,
ompi_communicator_t *comm, void *baseptr, ompi_win_t **newwin);
int ompi_win_allocate_shared(size_t size, int disp_unit, opal_info_t *info,
ompi_communicator_t *comm, void *baseptr, ompi_win_t **newwin);
int ompi_win_create_dynamic(opal_info_t *info, ompi_communicator_t *comm, ompi_win_t **newwin);
int ompi_win_free(ompi_win_t *win);
OMPI_DECLSPEC int ompi_win_set_name(ompi_win_t *win, const char *win_name);
OMPI_DECLSPEC int ompi_win_get_name(ompi_win_t *win, char *win_name, int *length);
OMPI_DECLSPEC int ompi_win_group(ompi_win_t *win, ompi_group_t **group);
/* Note that the defintion of an "invalid" window is closely related
to the defintion of an "invalid" communicator. See a big comment
in ompi/communicator/communicator.h about this. */
static inline int ompi_win_invalid(ompi_win_t *win) {
if (NULL == win ||
MPI_WIN_NULL == win ||
(OMPI_WIN_INVALID & win->w_flags) ||
(OMPI_WIN_FREED & win->w_flags)) {
return true;
} else {
return false;
}
}
static inline int ompi_win_peer_invalid(ompi_win_t *win, int peer) {
if (win->w_group->grp_proc_count <= peer || peer < 0) return true;
return false;
}
static inline int ompi_win_rank(ompi_win_t *win) {
return win->w_group->grp_my_rank;
}
static inline bool ompi_win_allow_locks(ompi_win_t *win) {
return (0 == (win->w_flags & OMPI_WIN_NO_LOCKS));
}
END_C_DECLS
#endif
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