svn commit: r282201 - in head: contrib/gcclibs/libgomp contrib/gcclibs/libgomp/config/bsd gnu/lib/libgomp
Pedro F. Giffuni
pfg at FreeBSD.org
Tue Apr 28 21:32:30 UTC 2015
Author: pfg
Date: Tue Apr 28 21:32:27 2015
New Revision: 282201
URL: https://svnweb.freebsd.org/changeset/base/282201
Log:
libgomp: bring initial BSD support from upstream.
Initial support for FreeBSD specific routines related to counting
online processors and dynamic load balancing.
Fix "detection" of the <sys/sysctl> header which upstream seems to have
done wrong.
Obtained from: GCC pre-4.4 branch (rev. 140497; LGPLv2.1+)
Added:
head/contrib/gcclibs/libgomp/ChangeLog.gcc44
head/contrib/gcclibs/libgomp/config/bsd/
head/contrib/gcclibs/libgomp/config/bsd/proc.c (contents, props changed)
Modified:
head/contrib/gcclibs/libgomp/config.h.in
head/contrib/gcclibs/libgomp/configure
head/contrib/gcclibs/libgomp/configure.ac
head/contrib/gcclibs/libgomp/configure.tgt
head/gnu/lib/libgomp/config.h
Added: head/contrib/gcclibs/libgomp/ChangeLog.gcc44
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/contrib/gcclibs/libgomp/ChangeLog.gcc44 Tue Apr 28 21:32:27 2015 (r282201)
@@ -0,0 +1,8 @@
+2008-09-19 Jakub Jelinek <jakub at redhat.com> (r140497)
+ Andreas Tobler <a.tobler at schweiz.org>
+
+ * config/bsd/proc.c: New file.
+ * configure.tgt (*-*-darwin*): Use config_path "darwin posix".
+ * configure.ac: Check for header <sys/sysctl.h>
+ * configure: Regenerate.
+ * config.h.in: Likewise.
Modified: head/contrib/gcclibs/libgomp/config.h.in
==============================================================================
--- head/contrib/gcclibs/libgomp/config.h.in Tue Apr 28 20:33:31 2015 (r282200)
+++ head/contrib/gcclibs/libgomp/config.h.in Tue Apr 28 21:32:27 2015 (r282201)
@@ -57,6 +57,9 @@
/* Define to 1 if you have the <sys/stat.h> header file. */
#undef HAVE_SYS_STAT_H
+/* Define to 1 if you have the <sys/sysctl.h> header file. */
+#undef HAVE_SYS_SYSCTL_H
+
/* Define to 1 if you have the <sys/time.h> header file. */
#undef HAVE_SYS_TIME_H
Added: head/contrib/gcclibs/libgomp/config/bsd/proc.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/contrib/gcclibs/libgomp/config/bsd/proc.c Tue Apr 28 21:32:27 2015 (r282201)
@@ -0,0 +1,117 @@
+/* Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
+ Contributed by Richard Henderson <rth at redhat.com>.
+
+ This file is part of the GNU OpenMP Library (libgomp).
+
+ Libgomp is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+ more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with libgomp; see the file COPYING.LIB. If not, write to the
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ MA 02110-1301, USA. */
+
+/* As a special exception, if you link this library with other files, some
+ of which are compiled with GCC, to produce an executable, this library
+ does not by itself cause the resulting executable to be covered by the
+ GNU General Public License. This exception does not however invalidate
+ any other reasons why the executable file might be covered by the GNU
+ General Public License. */
+
+/* This file contains system specific routines related to counting
+ online processors and dynamic load balancing. It is expected that
+ a system may well want to write special versions of each of these.
+
+ The following implementation uses a mix of POSIX and BSD routines. */
+
+#include "libgomp.h"
+#include <unistd.h>
+#include <stdlib.h>
+#ifdef HAVE_GETLOADAVG
+# ifdef HAVE_SYS_LOADAVG_H
+# include <sys/loadavg.h>
+# endif
+#endif
+#ifdef HAVE_SYS_SYSCTL_H
+# include <sys/sysctl.h>
+#endif
+
+static int
+get_num_procs (void)
+{
+#ifdef _SC_NPROCESSORS_ONLN
+ return sysconf (_SC_NPROCESSORS_ONLN);
+#elif defined HW_NCPU
+ int ncpus = 1;
+ size_t len = sizeof(ncpus);
+ sysctl((int[2]) {CTL_HW, HW_NCPU}, 2, &ncpus, &len, NULL, 0);
+ return ncpus;
+#else
+ return 0;
+#endif
+}
+
+/* At startup, determine the default number of threads. It would seem
+ this should be related to the number of cpus online. */
+
+void
+gomp_init_num_threads (void)
+{
+ int ncpus = get_num_procs ();
+
+ if (ncpus > 0)
+ gomp_global_icv.nthreads_var = ncpus;
+}
+
+/* When OMP_DYNAMIC is set, at thread launch determine the number of
+ threads we should spawn for this team. */
+/* ??? I have no idea what best practice for this is. Surely some
+ function of the number of processors that are *still* online and
+ the load average. Here I use the number of processors online
+ minus the 15 minute load average. */
+
+unsigned
+gomp_dynamic_max_threads (void)
+{
+ unsigned n_onln, loadavg;
+ unsigned nthreads_var = gomp_icv (false)->nthreads_var;
+
+ n_onln = get_num_procs ();
+ if (!n_onln || n_onln > nthreads_var)
+ n_onln = nthreads_var;
+
+ loadavg = 0;
+#ifdef HAVE_GETLOADAVG
+ {
+ double dloadavg[3];
+ if (getloadavg (dloadavg, 3) == 3)
+ {
+ /* Add 0.1 to get a kind of biased rounding. */
+ loadavg = dloadavg[2] + 0.1;
+ }
+ }
+#endif
+
+ if (loadavg >= n_onln)
+ return 1;
+ else
+ return n_onln - loadavg;
+}
+
+int
+omp_get_num_procs (void)
+{
+ int ncpus = get_num_procs ();
+ if (ncpus <= 0)
+ ncpus = gomp_icv (false)->nthreads_var;
+ return ncpus;
+}
+
+ialias (omp_get_num_procs)
Modified: head/contrib/gcclibs/libgomp/configure
==============================================================================
--- head/contrib/gcclibs/libgomp/configure Tue Apr 28 20:33:31 2015 (r282200)
+++ head/contrib/gcclibs/libgomp/configure Tue Apr 28 21:32:27 2015 (r282201)
@@ -13428,7 +13428,7 @@ fi
-for ac_header in unistd.h semaphore.h sys/loadavg.h sys/time.h
+for ac_header in unistd.h semaphore.h sys/loadavg.h sys/sysctl.h sys/time.h
do
as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
if eval "test \"\${$as_ac_Header+set}\" = set"; then
Modified: head/contrib/gcclibs/libgomp/configure.ac
==============================================================================
--- head/contrib/gcclibs/libgomp/configure.ac Tue Apr 28 20:33:31 2015 (r282200)
+++ head/contrib/gcclibs/libgomp/configure.ac Tue Apr 28 21:32:27 2015 (r282201)
@@ -154,7 +154,7 @@ AC_SUBST(libtool_VERSION)
# Check header files.
AC_STDC_HEADERS
AC_HEADER_TIME
-AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h)
+AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/sysctl.h sys/time.h)
GCC_HEADER_STDINT(gstdint.h)
Modified: head/contrib/gcclibs/libgomp/configure.tgt
==============================================================================
--- head/contrib/gcclibs/libgomp/configure.tgt Tue Apr 28 20:33:31 2015 (r282200)
+++ head/contrib/gcclibs/libgomp/configure.tgt Tue Apr 28 21:32:27 2015 (r282201)
@@ -107,6 +107,10 @@ case "${target}" in
XLDFLAGS="${XLDFLAGS} -lposix4"
;;
+ *-*-darwin*)
+ config_path="bsd posix"
+ ;;
+
*)
;;
Modified: head/gnu/lib/libgomp/config.h
==============================================================================
--- head/gnu/lib/libgomp/config.h Tue Apr 28 20:33:31 2015 (r282200)
+++ head/gnu/lib/libgomp/config.h Tue Apr 28 21:32:27 2015 (r282201)
@@ -55,6 +55,9 @@
/* Define to 1 if you have the <sys/stat.h> header file. */
#define HAVE_SYS_STAT_H 1
+/* Define to 1 if you have the <sys/sysctl.h> header file. */
+#define HAVE_SYS_SYSCTL_H 1
+
/* Define to 1 if you have the <sys/time.h> header file. */
#define HAVE_SYS_TIME_H 1
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