aec5cd08bd
WHAT: Merge the PMIx branch into the devel repo, creating a new
OPAL “lmix” framework to abstract PMI support for all RTEs.
Replace the ORTE daemon-level collectives with a new PMIx
server and update the ORTE grpcomm framework to support
server-to-server collectives
WHY: We’ve had problems dealing with variations in PMI implementations,
and need to extend the existing PMI definitions to meet exascale
requirements.
WHEN: Mon, Aug 25
WHERE: https://github.com/rhc54/ompi-svn-mirror.git
Several community members have been working on a refactoring of the current PMI support within OMPI. Although the APIs are common, Slurm and Cray implement a different range of capabilities, and package them differently. For example, Cray provides an integrated PMI-1/2 library, while Slurm separates the two and requires the user to specify the one to be used at runtime. In addition, several bugs in the Slurm implementations have caused problems requiring extra coding.
All this has led to a slew of #if’s in the PMI code and bugs when the corner-case logic for one implementation accidentally traps the other. Extending this support to other implementations would have increased this complexity to an unacceptable level.
Accordingly, we have:
* created a new OPAL “pmix” framework to abstract the PMI support, with separate components for Cray, Slurm PMI-1, and Slurm PMI-2 implementations.
* Replaced the current ORTE grpcomm daemon-based collective operation with an integrated PMIx server, and updated the grpcomm APIs to provide more flexible, multi-algorithm support for collective operations. At this time, only the xcast and allgather operations are supported.
* Replaced the current global collective id with a signature based on the names of the participating procs. The allows an unlimited number of collectives to be executed by any group of processes, subject to the requirement that only one collective can be active at a time for a unique combination of procs. Note that a proc can be involved in any number of simultaneous collectives - it is the specific combination of procs that is subject to the constraint
* removed the prior OMPI/OPAL modex code
* added new macros for executing modex send/recv to simplify use of the new APIs. The send macros allow the caller to specify whether or not the BTL supports async modex operations - if so, then the non-blocking “fence” operation is used, if the active PMIx component supports it. Otherwise, the default is a full blocking modex exchange as we currently perform.
* retained the current flag that directs us to use a blocking fence operation, but only to retrieve data upon demand
This commit was SVN r32570.
122 строки
4.2 KiB
C
122 строки
4.2 KiB
C
/*
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* Copyright (c) 2004-2007 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) 2004-2005 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) 2007 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2012 Los Alamos National Security, LLC
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* All rights reserved
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* Copyright (c) 2014 Intel 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 "orte_config.h"
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#include "orte/constants.h"
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#include <errno.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif /* HAVE_STRING_H */
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#include "opal/dss/dss.h"
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#include "orte/mca/rml/rml.h"
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#include "orte/mca/rml/rml_types.h"
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#include "orte/mca/errmgr/errmgr.h"
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#include "orte/runtime/orte_globals.h"
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#include "orte/mca/grpcomm/grpcomm.h"
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#include "orte/util/name_fns.h"
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#include "orte/mca/iof/iof.h"
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#include "orte/mca/iof/base/base.h"
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#include "iof_hnp.h"
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int orte_iof_hnp_send_data_to_endpoint(orte_process_name_t *host,
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orte_process_name_t *target,
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orte_iof_tag_t tag,
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unsigned char *data, int numbytes)
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{
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opal_buffer_t *buf;
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int rc;
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orte_grpcomm_signature_t *sig;
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/* if the host is a daemon and we are in the process of aborting,
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* then ignore this request. We leave it alone if the host is not
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* a daemon because it might be a tool that wants to watch the
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* output from an abort procedure
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*/
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if (ORTE_JOB_FAMILY(host->jobid) == ORTE_JOB_FAMILY(ORTE_PROC_MY_NAME->jobid)
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&& orte_job_term_ordered) {
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return ORTE_SUCCESS;
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}
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buf = OBJ_NEW(opal_buffer_t);
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/* pack the tag - we do this first so that flow control messages can
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* consist solely of the tag
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*/
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if (ORTE_SUCCESS != (rc = opal_dss.pack(buf, &tag, 1, ORTE_IOF_TAG))) {
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ORTE_ERROR_LOG(rc);
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OBJ_RELEASE(buf);
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return rc;
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}
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/* pack the name of the target - this is either the intended
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* recipient (if the tag is stdin and we are sending to a daemon),
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* or the source (if we are sending to anyone else)
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*/
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if (ORTE_SUCCESS != (rc = opal_dss.pack(buf, target, 1, ORTE_NAME))) {
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ORTE_ERROR_LOG(rc);
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OBJ_RELEASE(buf);
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return rc;
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}
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/* if data is NULL, then we are done */
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if (NULL != data) {
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/* pack the data - if numbytes is zero, we will pack zero bytes */
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if (ORTE_SUCCESS != (rc = opal_dss.pack(buf, data, numbytes, OPAL_BYTE))) {
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ORTE_ERROR_LOG(rc);
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OBJ_RELEASE(buf);
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return rc;
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}
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}
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/* if the target is wildcard, then this needs to go to everyone - xcast it */
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if (ORTE_PROC_MY_NAME->jobid == host->jobid &&
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ORTE_VPID_WILDCARD == host->vpid) {
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/* xcast this to everyone - the local daemons will know how to handle it */
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sig = OBJ_NEW(orte_grpcomm_signature_t);
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sig->signature = (orte_process_name_t*)malloc(sizeof(orte_process_name_t));
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sig->signature[0].jobid = ORTE_PROC_MY_NAME->jobid;
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sig->signature[0].vpid = ORTE_VPID_WILDCARD;
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(void)orte_grpcomm.xcast(sig, ORTE_RML_TAG_IOF_PROXY, buf);
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OBJ_RELEASE(buf);
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OBJ_RELEASE(sig);
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return ORTE_SUCCESS;
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}
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/* send the buffer to the host - this is either a daemon or
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* a tool that requested IOF
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*/
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if (0 > (rc = orte_rml.send_buffer_nb(host, buf, ORTE_RML_TAG_IOF_PROXY,
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orte_rml_send_callback, NULL))) {
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ORTE_ERROR_LOG(rc);
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return rc;
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}
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return ORTE_SUCCESS;
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}
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