df45221a3e
mpi_leave_pinned when multiple OpenIB HCA ports are found. Specifically, if mpi_leave_pinned == 1 and ultiple HCA ports are found, the MCA parameter btl_openib_max_btls is set to 1. If the MCA parameter btl_openib_warn_leave_pinned_multi_port is true, emit a warning that this happened (having an MCA parameter to control the warning allows users/sysadmins to turn it off instead of being nagged for every run). This commit was SVN r10521.
47 строки
1.8 KiB
Plaintext
47 строки
1.8 KiB
Plaintext
# -*- text -*-
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#
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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) 2004-2005 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) 2004-2006 The Regents of the University of California.
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# 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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# This is the US/English general help file for Open MPI.
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#
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[btl_openib:retry-exceeded]
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The InfiniBand retry count between two MPI processes has been
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exceeded. "Retry count" is defined in the InfiniBand spec 1.2
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(section 12.7.38):
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The total number of times that the sender wishes the receiver to
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retry timeout, packet sequence, etc. errors before posting a
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completion error.
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This error typically means that there is something awry within the
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InfiniBand fabric itself. You should note the hosts on which this
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error has occurred; it has been observed that rebooting or removing a
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particular host from the job can sometimes resolve this issue.
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Two MCA parameters can be used to control Open MPI's behavior with
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respect to the retry count:
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* btl_openib_ib_retry_count - The number of times the sender will
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attempt to retry (defaulted to 7, the maximum value).
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* btl_openib_ib_timeout - The local ACK timeout parameter (defaulted
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to 10). The actual timeout value used is calculated as:
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4.096 microseconds * (2^btl_openib_ib_timeout)
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See the InfiniBand spec 1.2 (section 12.7.34) for more details.
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