openmpi

Brian Barrett bfbc281e93 Fix slow startup issue with the MX MTL. The problem is caused by mx_connect() being a one-sided operation from the API level, but not being an interrupting call when the target is not entering the MX library. So if most of the processes exit mtl_mx_add_procs() and enter the stage gate 2 barrier, the other processes can only progress their mx_connect() calls when the targets enter the mx library. Because the event library is in EV_ONELOOP mode, this only happens once a second. The mx progress thread (hidden in the MX library) also only wakes up once a second, so mx_connect calls can take a second to complete.

The temporary solution is to switch into EV_NONBLOCK mode earlier (right after the mx_connect loop) so that there isn't a giant slowdown when processes enter the stage gate 2 barrier before other proesses.  They will now not block in the event library for any period of time, which appears to have a 50% speedup when running at > 64 procs.

Refs trac:645

This commit was SVN r12713.

The following Trac tickets were found above:
  Ticket 645 --> https://svn.open-mpi.org/trac/ompi/ticket/645

2006-12-01 02:49:01 +00:00

attribute

Bring over the update to terminate orteds that are generated by a dynamic spawn such as comm_spawn. This introduces the concept of a job "family" - i.e., jobs that have a parent/child relationship. Comm_spawn'ed jobs have a parent (the one that spawned them). We track that relationship throughout the lineage - i.e., if a comm_spawned job in turn calls comm_spawn, then it has a parent (the one that spawned it) and a "root" job (the original job that started things).

2006-11-14 19:34:59 +00:00

class

The correct way to compute the difference between the actual size and the

2006-10-20 19:33:55 +00:00

communicator

Rework the opal_progress interface to better support dynamic processes and at

2006-11-22 02:06:52 +00:00

datatype

Number of one-sided fixes:

2006-11-27 03:22:44 +00:00

debuggers

Remove all warnings from the TotalView interface.

2006-10-11 17:29:29 +00:00

errhandler

Explicit casts for our friendly Windows environment...

2006-11-08 17:02:46 +00:00

etc

Next step in the project split, mainly source code re-arranging

2006-02-12 01:33:29 +00:00

file

They are supposed to be ints not size_t.

2006-11-08 17:05:15 +00:00

group

just a reordering of the arguments in a comparison in order to comply with the

2006-10-23 17:14:23 +00:00

include

Follow on to r12146. For platforms that dont' have a ptrdiff_t definition,

2006-10-20 03:24:59 +00:00

info

The last patch for Windows support. Mostly casting and conversion to C++ friendly headers.

2006-08-24 16:38:08 +00:00

mca

Fix slow startup issue with the MX MTL. The problem is caused by mx_connect() being a one-sided operation from the API level, but not being an interrupting call when the target is not entering the MX library. So if most of the processes exit mtl_mx_add_procs() and enter the stage gate 2 barrier, the other processes can only progress their mx_connect() calls when the targets enter the mx library. Because the event library is in EV_ONELOOP mode, this only happens once a second. The mx progress thread (hidden in the MX library) also only wakes up once a second, so mx_connect calls can take a second to complete.

2006-12-01 02:49:01 +00:00

mpi

Fixes trac:482

2006-11-30 19:48:18 +00:00

The last patch for Windows support. Mostly casting and conversion to C++ friendly headers.

2006-08-24 16:38:08 +00:00

peruse

The last patch for Windows support. Mostly casting and conversion to C++ friendly headers.

2006-08-24 16:38:08 +00:00

proc

2006-11-14 19:34:59 +00:00

request

Explicit casts for our friendly Windows environment...

2006-11-08 17:02:46 +00:00

runtime

Add xcast timing in mpi_init since we cannot directly measure it (tree-based comm).

2006-11-30 15:06:40 +00:00

tools

add odls framework to ompi_info

2006-11-29 16:24:49 +00:00

win

Last set of explicit conversions. We are now close to the zero warnings on

2006-10-20 03:57:44 +00:00

Makefile.am

Install Fortran 77 bindings as a stand-alone library, rather than as part of

2006-09-08 01:35:49 +00:00

README.dox

Update the copyright notices for IU and UTK.

2005-11-05 19:57:48 +00:00

README.dox

/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 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.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */
/** @mainpage

@section mainpage_introduction Introduction

This is the introduction.
This is the introduction.
This is the introduction.
This is the introduction.
This is the introduction.
This is the introduction.
This is the introduction.

@section main_install Installation
 
This is the installation section.
This is the installation section.
This is the installation section.
This is the installation section.
This is the installation section.
This is the installation section.
This is the installation section.

*/