13643f5b6e
This commit makes the folowing changes: - Add support for the knem single-copy mechanism. Initially vader will only support the synchronous copy mode. Asynchronous copy support may be added int the future. - Improve Linux cross memory attach (CMA) when using restrictive ptrace settings. This will allow Open MPI to use CMA without modifying the system settings to support ptrace attach (see /etc/sysctl.d/10-ptrace.conf). - Allow runtime selection of the single copy mechanism. The default behavior is to use the best available. The priority list of single-copy mehanisms is as follows: xpmem, cma, and knem. - Allow disabling support for kernel-assisted single copy. - Some tuning and bug fixes.
47 строки
1.6 KiB
Bash
47 строки
1.6 KiB
Bash
# -*- shell-script -*-
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#
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# Copyright (c) 2009 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) 2009-2010 Cisco Systems, Inc. All rights reserved.
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# Copyright (c) 2010-2012 IBM Corporation. All rights reserved.
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# Copyright (c) 2013-2014 Los Alamos National Security, LLC. All rights
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# 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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# OPAL_CHECK_CMA(prefix, [action-if-found], [action-if-not-found])
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# --------------------------------------------------------
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# check if cma support is wanted.
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AC_DEFUN([OPAL_CHECK_CMA],[
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OPAL_VAR_SCOPE_PUSH([ompi_check_cma_happy ompi_check_cma_need_defs])
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ompi_check_cma_happy="no"
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AC_ARG_WITH([cma],
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[AC_HELP_STRING([--with-cma],
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[Build Cross Memory Attach support (default: no)])])
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AC_MSG_CHECKING([if user requested CMA build])
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if test "$with_cma" = "yes" ; then
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ompi_check_cma_happy="yes"
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AC_MSG_RESULT([yes])
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AC_CHECK_FUNC(process_vm_readv, [ompi_check_cma_need_defs=0],
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[ompi_check_cma_need_defs=1])
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AC_DEFINE_UNQUOTED([OPAL_CMA_NEED_SYSCALL_DEFS],
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[$ompi_check_cma_need_defs],
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[Need CMA syscalls defined])
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AC_CHECK_HEADERS([sys/prctl.h])
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else
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AC_MSG_RESULT([no])
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fi
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AS_IF([test "$ompi_check_cma_happy" = "yes"],
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[$2],
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[$3])
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OPAL_VAR_SCOPE_POP
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])dnl
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