dfb952fa78
Replace our old, clunky timing setup with a much nicer one that is only available if configured with --enable-timing. Add a tool for profiling clock differences between the nodes so you can get more precise timing measurements. I'll ask Artem to update the Github wiki with full instructions on how to use this setup. This commit was SVN r32738.
449 строки
15 KiB
C
449 строки
15 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2004-2010 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) 2004-2011 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) 2006-2013 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2006-2014 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2006 University of Houston. All rights reserved.
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* Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.
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* Copyright (c) 2011 Sandia National Laboratories. All rights reserved.
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* Copyright (c) 2014 Intel, Inc. All rights reserved.
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*
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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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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#include "opal/mca/event/event.h"
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#include "opal/util/output.h"
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#include "opal/runtime/opal_progress.h"
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#include "opal/mca/base/base.h"
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#include "opal/sys/atomic.h"
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#include "opal/runtime/opal.h"
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#include "opal/util/show_help.h"
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#include "opal/mca/mpool/base/base.h"
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#include "opal/mca/mpool/base/mpool_base_tree.h"
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#include "opal/mca/rcache/base/base.h"
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#include "opal/mca/allocator/base/base.h"
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#include "opal/mca/pmix/pmix.h"
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#include "opal/util/timings.h"
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#include "mpi.h"
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#include "ompi/constants.h"
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#include "ompi/errhandler/errcode.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/datatype/ompi_datatype.h"
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#include "ompi/message/message.h"
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#include "ompi/op/op.h"
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#include "ompi/file/file.h"
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#include "ompi/info/info.h"
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#include "ompi/runtime/mpiruntime.h"
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#include "ompi/attribute/attribute.h"
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#include "ompi/mca/pml/pml.h"
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#include "ompi/mca/bml/bml.h"
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#include "ompi/mca/pml/base/base.h"
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#include "ompi/mca/bml/base/base.h"
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#include "ompi/mca/osc/base/base.h"
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#include "ompi/mca/coll/base/base.h"
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#include "ompi/mca/rte/rte.h"
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#include "ompi/mca/rte/base/base.h"
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#include "ompi/mca/topo/base/base.h"
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#include "ompi/mca/io/io.h"
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#include "ompi/mca/io/base/base.h"
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#include "ompi/mca/pml/base/pml_base_bsend.h"
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#include "ompi/runtime/params.h"
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#include "ompi/mca/dpm/base/base.h"
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#include "ompi/mca/pubsub/base/base.h"
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#include "ompi/mpiext/mpiext.h"
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#if OPAL_ENABLE_FT_CR == 1
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#include "ompi/mca/crcp/crcp.h"
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#include "ompi/mca/crcp/base/base.h"
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#endif
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#include "ompi/runtime/ompi_cr.h"
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extern bool ompi_enable_timing;
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int ompi_mpi_finalize(void)
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{
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int ret;
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static int32_t finalize_has_already_started = 0;
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opal_list_item_t *item;
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ompi_proc_t** procs;
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size_t nprocs;
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OPAL_TIMING_DECLARE(tm);
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OPAL_TIMING_INIT(&tm);
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/* Be a bit social if an erroneous program calls MPI_FINALIZE in
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two different threads, otherwise we may deadlock in
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ompi_comm_free() (or run into other nasty lions, tigers, or
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bears) */
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if (! opal_atomic_cmpset_32(&finalize_has_already_started, 0, 1)) {
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/* Note that if we're already finalized, we cannot raise an
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MPI exception. The best that we can do is write something
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to stderr. */
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char hostname[MAXHOSTNAMELEN];
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pid_t pid = getpid();
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gethostname(hostname, sizeof(hostname));
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opal_show_help("help-mpi-runtime.txt",
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"mpi_finalize:invoked_multiple_times",
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true, hostname, pid);
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return MPI_ERR_OTHER;
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}
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ompi_mpiext_fini();
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/* Per MPI-2:4.8, we have to free MPI_COMM_SELF before doing
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anything else in MPI_FINALIZE (to include setting up such that
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MPI_FINALIZED will return true). */
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if (NULL != ompi_mpi_comm_self.comm.c_keyhash) {
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ompi_attr_delete_all(COMM_ATTR, &ompi_mpi_comm_self,
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ompi_mpi_comm_self.comm.c_keyhash);
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OBJ_RELEASE(ompi_mpi_comm_self.comm.c_keyhash);
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ompi_mpi_comm_self.comm.c_keyhash = NULL;
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}
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/* Proceed with MPI_FINALIZE */
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ompi_mpi_finalized = true;
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/* As finalize is the last legal MPI call, we are allowed to force the release
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* of the user buffer used for bsend, before going anywhere further.
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*/
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(void)mca_pml_base_bsend_detach(NULL, NULL);
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#if OPAL_ENABLE_PROGRESS_THREADS == 0
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opal_progress_set_event_flag(OPAL_EVLOOP_ONCE | OPAL_EVLOOP_NONBLOCK);
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#endif
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/* Redo ORTE calling opal_progress_event_users_increment() during
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MPI lifetime, to get better latency when not using TCP */
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opal_progress_event_users_increment();
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/* check to see if we want timing information */
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OPAL_TIMING_EVENT((&tm,"Start barrier"));
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/* NOTE: MPI-2.1 requires that MPI_FINALIZE is "collective" across
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*all* connected processes. This only means that all processes
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have to call it. It does *not* mean that all connected
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processes need to synchronize (either directly or indirectly).
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For example, it is quite easy to construct complicated
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scenarios where one job is "connected" to another job via
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transitivity, but have no direct knowledge of each other.
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Consider the following case: job A spawns job B, and job B
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later spawns job C. A "connectedness" graph looks something
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like this:
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A <--> B <--> C
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So what are we *supposed* to do in this case? If job A is
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still connected to B when it calls FINALIZE, should it block
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until jobs B and C also call FINALIZE?
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After lengthy discussions many times over the course of this
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project, the issue was finally decided at the Louisville Feb
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2009 meeting: no.
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Rationale:
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- "Collective" does not mean synchronizing. It only means that
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every process call it. Hence, in this scenario, every
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process in A, B, and C must call FINALIZE.
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- KEY POINT: if A calls FINALIZE, then it is erroneous for B or
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C to try to communicate with A again.
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- Hence, OMPI is *correct* to only effect a barrier across each
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jobs' MPI_COMM_WORLD before exiting. Specifically, if A
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calls FINALIZE long before B or C, it's *correct* if A exits
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at any time (and doesn't notify B or C that it is exiting).
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- Arguably, if B or C do try to communicate with the now-gone
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A, OMPI should try to print a nice error ("you tried to
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communicate with a job that is already gone...") instead of
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segv or other Badness. However, that is an *extremely*
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difficult problem -- sure, it's easy for A to tell B that it
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is finalizing, but how can A tell C? A doesn't even know
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about C. You'd need to construct a "connected" graph in a
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distributed fashion, which is fraught with race conditions,
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etc.
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Hence, our conclusion is: OMPI is *correct* in its current
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behavior (of only doing a barrier across its own COMM_WORLD)
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before exiting. Any problems that occur are as a result of
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erroneous MPI applications. We *could* tighten up the erroneous
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cases and ensure that we print nice error messages / don't
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crash, but that is such a difficult problem that we decided we
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have many other, much higher priority issues to handle that deal
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with non-erroneous cases. */
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/* Wait for everyone to reach this point. This is a grpcomm
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barrier instead of an MPI barrier for (at least) two reasons:
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1. An MPI barrier doesn't ensure that all messages have been
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transmitted before exiting (e.g., a BTL can lie and buffer a
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message without actually injecting it to the network, and
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therefore require further calls to that BTL's progress), so
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the possibility of a stranded message exists.
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2. If the MPI communication is using an unreliable transport,
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there's a problem of knowing that everyone has *left* the
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barrier. E.g., one proc can send its ACK to the barrier
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message to a peer and then leave the barrier, but the ACK
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can get lost and therefore the peer is left in the barrier.
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Point #1 has been known for a long time; point #2 emerged after
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we added the first unreliable BTL to Open MPI and fixed the
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del_procs behavior around May of 2014 (see
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https://svn.open-mpi.org/trac/ompi/ticket/4669#comment:4 for
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more details). */
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opal_pmix.fence(NULL, 0);
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/* check for timing request - get stop time and report elapsed
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time if so */
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OPAL_TIMING_EVENT((&tm,"Finish barrier"));
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OPAL_TIMING_REPORT(ompi_enable_timing, &tm, "MPI_Finish");
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OPAL_TIMING_RELEASE(&tm);
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/*
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* Shutdown the Checkpoint/Restart Mech.
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*/
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if (OMPI_SUCCESS != (ret = ompi_cr_finalize())) {
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OMPI_ERROR_LOG(ret);
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}
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/* Shut down any bindings-specific issues: C++, F77, F90 */
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/* Remove all memory associated by MPI_REGISTER_DATAREP (per
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MPI-2:9.5.3, there is no way for an MPI application to
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*un*register datareps, but we don't want the OMPI layer causing
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memory leaks). */
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while (NULL != (item = opal_list_remove_first(&ompi_registered_datareps))) {
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OBJ_RELEASE(item);
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}
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OBJ_DESTRUCT(&ompi_registered_datareps);
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/* Remove all F90 types from the hash tables. As the OBJ_DESTRUCT will
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* call a special destructor able to release predefined types, we can
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* simply call the OBJ_DESTRUCT on the hash table and all memory will
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* be correctly released.
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*/
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OBJ_DESTRUCT( &ompi_mpi_f90_integer_hashtable );
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OBJ_DESTRUCT( &ompi_mpi_f90_real_hashtable );
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OBJ_DESTRUCT( &ompi_mpi_f90_complex_hashtable );
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/* Free communication objects */
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/* free file resources */
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if (OMPI_SUCCESS != (ret = ompi_file_finalize())) {
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return ret;
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}
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/* free window resources */
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if (OMPI_SUCCESS != (ret = ompi_win_finalize())) {
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return ret;
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}
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if (OMPI_SUCCESS != (ret = ompi_osc_base_finalize())) {
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return ret;
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}
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/* free communicator resources. this MUST come before finalizing the PML
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* as this will call into the pml */
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if (OMPI_SUCCESS != (ret = ompi_comm_finalize())) {
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return ret;
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}
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nprocs = 0;
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procs = ompi_proc_world(&nprocs);
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MCA_PML_CALL(del_procs(procs, nprocs));
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free(procs);
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/* free pml resource */
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if(OMPI_SUCCESS != (ret = mca_pml_base_finalize())) {
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return ret;
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}
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/* free requests */
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if (OMPI_SUCCESS != (ret = ompi_request_finalize())) {
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return ret;
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}
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if (OMPI_SUCCESS != (ret = ompi_message_finalize())) {
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return ret;
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}
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/* If requested, print out a list of memory allocated by ALLOC_MEM
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but not freed by FREE_MEM */
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if (0 != ompi_debug_show_mpi_alloc_mem_leaks) {
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mca_mpool_base_tree_print(ompi_debug_show_mpi_alloc_mem_leaks);
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}
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/* Now that all MPI objects dealing with communications are gone,
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shut down MCA types having to do with communications */
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if (OMPI_SUCCESS != (ret = mca_base_framework_close(&ompi_pml_base_framework) ) ) {
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OMPI_ERROR_LOG(ret);
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return ret;
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}
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/* shut down buffered send code */
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mca_pml_base_bsend_fini();
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#if OPAL_ENABLE_FT_CR == 1
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/*
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* Shutdown the CRCP Framework, must happen after PML shutdown
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*/
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if (OMPI_SUCCESS != (ret = mca_base_framework_close(&ompi_crcp_base_framework) ) ) {
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OMPI_ERROR_LOG(ret);
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return ret;
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}
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#endif
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/* Free secondary resources */
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/* free attr resources */
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if (OMPI_SUCCESS != (ret = ompi_attr_finalize())) {
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return ret;
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}
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/* free group resources */
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if (OMPI_SUCCESS != (ret = ompi_group_finalize())) {
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return ret;
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}
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/* free proc resources */
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if ( OMPI_SUCCESS != (ret = ompi_proc_finalize())) {
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return ret;
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}
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/* finalize the pubsub functions */
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if (OMPI_SUCCESS != (ret = mca_base_framework_close(&ompi_pubsub_base_framework) ) ) {
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return ret;
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}
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/* finalize the DPM framework */
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if ( OMPI_SUCCESS != (ret = mca_base_framework_close(&ompi_dpm_base_framework))) {
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return ret;
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}
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/* free internal error resources */
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if (OMPI_SUCCESS != (ret = ompi_errcode_intern_finalize())) {
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return ret;
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}
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/* free error code resources */
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if (OMPI_SUCCESS != (ret = ompi_mpi_errcode_finalize())) {
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return ret;
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}
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/* free errhandler resources */
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if (OMPI_SUCCESS != (ret = ompi_errhandler_finalize())) {
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return ret;
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}
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/* Free all other resources */
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/* free op resources */
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if (OMPI_SUCCESS != (ret = ompi_op_finalize())) {
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return ret;
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}
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/* free ddt resources */
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if (OMPI_SUCCESS != (ret = ompi_datatype_finalize())) {
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return ret;
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}
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/* free info resources */
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if (OMPI_SUCCESS != (ret = ompi_info_finalize())) {
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return ret;
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}
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/* Close down MCA modules */
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/* io is opened lazily, so it's only necessary to close it if it
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was actually opened */
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if (0 < ompi_io_base_framework.framework_refcnt) {
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/* May have been "opened" multiple times. We want it closed now */
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ompi_io_base_framework.framework_refcnt = 1;
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if (OMPI_SUCCESS != mca_base_framework_close(&ompi_io_base_framework)) {
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return ret;
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}
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}
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(void) mca_base_framework_close(&ompi_topo_base_framework);
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if (OMPI_SUCCESS != (ret = mca_base_framework_close(&ompi_osc_base_framework))) {
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return ret;
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}
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if (OMPI_SUCCESS != (ret = mca_base_framework_close(&ompi_coll_base_framework))) {
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return ret;
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}
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if (OMPI_SUCCESS != (ret = mca_base_framework_close(&ompi_bml_base_framework))) {
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return ret;
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}
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if (OMPI_SUCCESS != (ret = mca_base_framework_close(&opal_mpool_base_framework))) {
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return ret;
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}
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if (OMPI_SUCCESS != (ret = mca_base_framework_close(&opal_rcache_base_framework))) {
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return ret;
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}
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if (OMPI_SUCCESS != (ret = mca_base_framework_close(&opal_allocator_base_framework))) {
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return ret;
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}
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if (NULL != ompi_mpi_main_thread) {
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OBJ_RELEASE(ompi_mpi_main_thread);
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ompi_mpi_main_thread = NULL;
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}
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/* Leave the RTE */
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if (OMPI_SUCCESS != (ret = ompi_rte_finalize())) {
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return ret;
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}
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ompi_rte_initialized = false;
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/* now close the rte framework */
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if (OMPI_SUCCESS != (ret = mca_base_framework_close(&ompi_rte_base_framework) ) ) {
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OMPI_ERROR_LOG(ret);
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return ret;
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}
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if (OPAL_SUCCESS != (ret = opal_finalize_util())) {
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return ret;
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}
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/* All done */
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return MPI_SUCCESS;
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}
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