533a8e6dae
This support broke when we enabled CMA by default. Addreses the issue raised by #3270. Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
137 строки
4.0 KiB
Bash
137 строки
4.0 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) 2009-2016 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) 2013-2016 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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AC_ARG_WITH([cma],
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[AC_HELP_STRING([--with-cma],
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[Build Cross Memory Attach support (default: autodetect)])])
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if test "x$with_cma" = "xno" ; then
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opal_check_cma_happy=0
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fi
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# We only need to do the back-end test once
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if test -z "$opal_check_cma_happy" ; then
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OPAL_CHECK_CMA_BACKEND
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fi
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AS_IF([test $opal_check_cma_happy -eq 1],
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[$2],
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[if test "$with_cma" = "yes"; then
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AC_MSG_WARN([--with-cma support requested, but not available])
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AC_MSG_ERROR([Cannot continue])
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fi
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$3])
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])
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AC_DEFUN([OPAL_CHECK_CMA_BACKEND],
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[
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OPAL_VAR_SCOPE_PUSH([opal_check_cma_need_defs opal_check_cma_kernel_version opal_check_cma_CFLAGS opal_check_cma_msg])
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# Some systems have process_cm_readv() in libc, which means CMA is
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# supported. Other systems do not have process_cm_readv() in
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# libc, but have support for it in the kernel if we invoke it
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# directly. Check for both.
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AC_CHECK_HEADERS([sys/prctl.h])
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AC_CHECK_FUNC([process_vm_readv], [opal_check_cma_need_defs=0],
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[opal_check_cma_need_defs=1])
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AC_DEFINE_UNQUOTED([OPAL_CMA_NEED_SYSCALL_DEFS],
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[$opal_check_cma_need_defs],
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[Need CMA syscalls defined])
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if test $opal_check_cma_need_defs -eq 1 ; then
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opal_check_cma_CFLAGS=$CFLAGS
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# Need some extra include paths to locate the appropriate headers
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CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/opal/include"
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AC_MSG_CHECKING([if internal syscall numbers for Linux CMA work])
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AC_RUN_IFELSE([AC_LANG_PROGRAM([[
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/uio.h>
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#include <sys/wait.h>
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#include <sys/syscall.h>
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#include "opal/include/opal/sys/cma.h"
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static void do_check (pid_t pid, int *in, int *out)
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{
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int check[4] = {0, 0, 0, 0}, i;
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struct iovec rem_iov = {out, sizeof (check)};
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struct iovec loc_iov = {check, sizeof (check)};
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ssize_t rc;
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rc = process_vm_readv (pid, &loc_iov, 1, &rem_iov, 1, 0);
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if (sizeof (check) != rc) {
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exit (1);
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}
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for (i = 0 ; i < 4 ; ++i) {
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if (check[i] != i) {
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exit (1);
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}
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check[i] = i * 2;
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}
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rem_iov.iov_base = in;
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rc = process_vm_writev (pid, &loc_iov, 1, &rem_iov, 1, 0);
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if (sizeof (check) != rc) {
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exit (1);
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}
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exit (0);
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}
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]],[[
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int i, in[4] = {-1, -1, -1, -1}, out[4] = {0, 1, 2, 3};
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do_check (getpid (), in, out);
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for (i = 0 ; i < 4 ; ++i) {
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if (in[i] != 2 * i) {
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return 1;
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}
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}
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/* all good */
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return 0;
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]])],
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[AC_MSG_RESULT([yes])
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opal_check_cma_happy=1],
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[AC_MSG_RESULT([no])
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opal_check_cma_happy=0],
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[AC_MSG_RESULT([no (cross-compiling)])
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opal_check_cma_happy=0])
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CFLAGS=$opal_check_cma_CFLAGS
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else
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# If we didn't need the defs, then we have process_vm_readv(),
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# and CMA is happy.
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opal_check_cma_happy=1
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fi
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OPAL_VAR_SCOPE_POP
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AS_IF([test $opal_check_cma_happy -eq 1],
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[opal_check_cma_msg=yes],
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[opal_check_cma_msg=no])
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OPAL_SUMMARY_ADD([[Transports]],[[Shared memory/Linux CMA]],[$1],[$opal_check_cma_msg])
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])
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