ax_count_cpus.m4 (5928B)
1 # =========================================================================== 2 # https://www.gnu.org/software/autoconf-archive/ax_count_cpus.html 3 # =========================================================================== 4 # 5 # SYNOPSIS 6 # 7 # AX_COUNT_CPUS([ACTION-IF-DETECTED],[ACTION-IF-NOT-DETECTED]) 8 # 9 # DESCRIPTION 10 # 11 # Attempt to count the number of logical processor cores (including 12 # virtual and HT cores) currently available to use on the machine and 13 # place detected value in CPU_COUNT variable. 14 # 15 # On successful detection, ACTION-IF-DETECTED is executed if present. If 16 # the detection fails, then ACTION-IF-NOT-DETECTED is triggered. The 17 # default ACTION-IF-NOT-DETECTED is to set CPU_COUNT to 1. 18 # 19 # LICENSE 20 # 21 # Copyright (c) 2014,2016 Karlson2k (Evgeny Grin) <k2k@narod.ru> 22 # Copyright (c) 2012 Brian Aker <brian@tangent.org> 23 # Copyright (c) 2008 Michael Paul Bailey <jinxidoru@byu.net> 24 # Copyright (c) 2008 Christophe Tournayre <turn3r@users.sourceforge.net> 25 # 26 # Copying and distribution of this file, with or without modification, are 27 # permitted in any medium without royalty provided the copyright notice 28 # and this notice are preserved. This file is offered as-is, without any 29 # warranty. 30 31 #serial 22 32 33 AC_DEFUN([AX_COUNT_CPUS],[dnl 34 AC_REQUIRE([AC_CANONICAL_HOST])dnl 35 AC_REQUIRE([AC_PROG_EGREP])dnl 36 AC_MSG_CHECKING([the number of available CPUs]) 37 CPU_COUNT="0" 38 39 # Try generic methods 40 41 # 'getconf' is POSIX utility, but '_NPROCESSORS_ONLN' and 42 # 'NPROCESSORS_ONLN' are platform-specific 43 command -v getconf >/dev/null 2>&1 && \ 44 CPU_COUNT=`getconf _NPROCESSORS_ONLN 2>/dev/null || getconf NPROCESSORS_ONLN 2>/dev/null` || CPU_COUNT="0" 45 AS_IF([[test "$CPU_COUNT" -gt "0" 2>/dev/null || ! command -v nproc >/dev/null 2>&1]],[[: # empty]],[dnl 46 # 'nproc' is part of GNU Coreutils and is widely available 47 CPU_COUNT=`OMP_NUM_THREADS='' nproc 2>/dev/null` || CPU_COUNT=`nproc 2>/dev/null` || CPU_COUNT="0" 48 ])dnl 49 50 AS_IF([[test "$CPU_COUNT" -gt "0" 2>/dev/null]],[[: # empty]],[dnl 51 # Try platform-specific preferred methods 52 AS_CASE([[$host_os]],dnl 53 [[*linux*]],[[CPU_COUNT=`lscpu -p 2>/dev/null | $EGREP -e '^@<:@0-9@:>@+,' -c` || CPU_COUNT="0"]],dnl 54 [[*darwin*]],[[CPU_COUNT=`sysctl -n hw.logicalcpu 2>/dev/null` || CPU_COUNT="0"]],dnl 55 [[freebsd*]],[[command -v sysctl >/dev/null 2>&1 && CPU_COUNT=`sysctl -n kern.smp.cpus 2>/dev/null` || CPU_COUNT="0"]],dnl 56 [[netbsd*]], [[command -v sysctl >/dev/null 2>&1 && CPU_COUNT=`sysctl -n hw.ncpuonline 2>/dev/null` || CPU_COUNT="0"]],dnl 57 [[solaris*]],[[command -v psrinfo >/dev/null 2>&1 && CPU_COUNT=`psrinfo 2>/dev/null | $EGREP -e '^@<:@0-9@:>@.*on-line' -c 2>/dev/null` || CPU_COUNT="0"]],dnl 58 [[mingw*]],[[CPU_COUNT=`ls -qpU1 /proc/registry/HKEY_LOCAL_MACHINE/HARDWARE/DESCRIPTION/System/CentralProcessor/ 2>/dev/null | $EGREP -e '^@<:@0-9@:>@+/' -c` || CPU_COUNT="0"]],dnl 59 [[msys*]],[[CPU_COUNT=`ls -qpU1 /proc/registry/HKEY_LOCAL_MACHINE/HARDWARE/DESCRIPTION/System/CentralProcessor/ 2>/dev/null | $EGREP -e '^@<:@0-9@:>@+/' -c` || CPU_COUNT="0"]],dnl 60 [[cygwin*]],[[CPU_COUNT=`ls -qpU1 /proc/registry/HKEY_LOCAL_MACHINE/HARDWARE/DESCRIPTION/System/CentralProcessor/ 2>/dev/null | $EGREP -e '^@<:@0-9@:>@+/' -c` || CPU_COUNT="0"]]dnl 61 )dnl 62 ])dnl 63 64 AS_IF([[test "$CPU_COUNT" -gt "0" 2>/dev/null || ! command -v sysctl >/dev/null 2>&1]],[[: # empty]],[dnl 65 # Try less preferred generic method 66 # 'hw.ncpu' exist on many platforms, but not on GNU/Linux 67 CPU_COUNT=`sysctl -n hw.ncpu 2>/dev/null` || CPU_COUNT="0" 68 ])dnl 69 70 AS_IF([[test "$CPU_COUNT" -gt "0" 2>/dev/null]],[[: # empty]],[dnl 71 # Try platform-specific fallback methods 72 # They can be less accurate and slower then preferred methods 73 AS_CASE([[$host_os]],dnl 74 [[*linux*]],[[CPU_COUNT=`$EGREP -e '^processor' -c /proc/cpuinfo 2>/dev/null` || CPU_COUNT="0"]],dnl 75 [[*darwin*]],[[CPU_COUNT=`system_profiler SPHardwareDataType 2>/dev/null | $EGREP -i -e 'number of cores:'|cut -d : -f 2 -s|tr -d ' '` || CPU_COUNT="0"]],dnl 76 [[freebsd*]],[[CPU_COUNT=`dmesg 2>/dev/null| $EGREP -e '^cpu@<:@0-9@:>@+: '|sort -u|$EGREP -e '^' -c` || CPU_COUNT="0"]],dnl 77 [[netbsd*]], [[CPU_COUNT=`command -v cpuctl >/dev/null 2>&1 && cpuctl list 2>/dev/null| $EGREP -e '^@<:@0-9@:>@+ .* online ' -c` || \ 78 CPU_COUNT=`dmesg 2>/dev/null| $EGREP -e '^cpu@<:@0-9@:>@+ at'|sort -u|$EGREP -e '^' -c` || CPU_COUNT="0"]],dnl 79 [[solaris*]],[[command -v kstat >/dev/null 2>&1 && CPU_COUNT=`kstat -m cpu_info -s state -p 2>/dev/null | $EGREP -c -e 'on-line'` || \ 80 CPU_COUNT=`kstat -m cpu_info 2>/dev/null | $EGREP -c -e 'module: cpu_info'` || CPU_COUNT="0"]],dnl 81 [[mingw*]],[AS_IF([[CPU_COUNT=`reg query 'HKLM\\Hardware\\Description\\System\\CentralProcessor' 2>/dev/null | $EGREP -e '\\\\@<:@0-9@:>@+$' -c`]],dnl 82 [[: # empty]],[[test "$NUMBER_OF_PROCESSORS" -gt "0" 2>/dev/null && CPU_COUNT="$NUMBER_OF_PROCESSORS"]])],dnl 83 [[msys*]],[[test "$NUMBER_OF_PROCESSORS" -gt "0" 2>/dev/null && CPU_COUNT="$NUMBER_OF_PROCESSORS"]],dnl 84 [[cygwin*]],[[test "$NUMBER_OF_PROCESSORS" -gt "0" 2>/dev/null && CPU_COUNT="$NUMBER_OF_PROCESSORS"]]dnl 85 )dnl 86 ])dnl 87 88 AS_IF([[test "x$CPU_COUNT" != "x0" && test "$CPU_COUNT" -gt 0 2>/dev/null]],[dnl 89 AC_MSG_RESULT([[$CPU_COUNT]]) 90 m4_ifvaln([$1],[$1],)dnl 91 ],[dnl 92 m4_ifval([$2],[dnl 93 AS_UNSET([[CPU_COUNT]]) 94 AC_MSG_RESULT([[unable to detect]]) 95 $2 96 ], [dnl 97 CPU_COUNT="1" 98 AC_MSG_RESULT([[unable to detect (assuming 1)]]) 99 ])dnl 100 ])dnl 101 ])dnl