141 lines
4.5 KiB
Plaintext
141 lines
4.5 KiB
Plaintext
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# ===========================================================================
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# http://autoconf-archive.cryp.to/ax_cache_size.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_CACHE_SIZE
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#
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# DESCRIPTION
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#
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# Find L1 and L2 caches size by reading the corresponding file on UNIX or
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# by requesting cpuid. The results are available in the substituted variables
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# M4RI_CPU_L1_CACHE and M4RI_CPU_L2_CACHE.
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#
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# This macro depends on AX_GCC_X86_CPUID, AC_PROG_SED, and AX_CPU_VENDOR.
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#
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# LAST MODIFICATION
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#
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# 2011-04-11
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#
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# COPYLEFT
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#
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# Copyright (c) 2008 Christophe Tournayre <turn3r@users.sourceforge.net>
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#
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# Patched by:
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#
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# Copyright (c) 2008 Martin Albrecht <M.R.Albrecht@rhul.ac.uk>
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# Copyright (c) 2008 Arnaud Bergeron <abergeron@gmail.com>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved.
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AC_DEFUN([AX_CACHE_SIZE],
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[
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AC_REQUIRE([AC_PROG_SED])
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AC_REQUIRE([AX_GCC_X86_CPUID])
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AC_REQUIRE([AX_CPU_VENDOR])
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AX_CPU_VENDOR
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ax_l1_size=
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ax_l2_size=
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#Check if the variable is present
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if test -e /sys/devices/system/cpu/cpu0/cache/index0/size; then
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for idx in `seq 0 3`; do
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if test -e /sys/devices/system/cpu/cpu0/cache/index$idx/size ; then
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level=`cat /sys/devices/system/cpu/cpu0/cache/index$idx/level`
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size=`cat /sys/devices/system/cpu/cpu0/cache/index$idx/size`
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eval CPU0\_L$level\_CACHE="$size"
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fi
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done
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ax_l1_size=$CPU0_L1_CACHE
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ax_l2_size=$CPU0_L2_CACHE
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ax_l3_size=$CPU0_L3_CACHE
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else
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if test "x$ax_cv_cpu_vendor" != "xUnknown"; then
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#Or use CPUID
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AX_GCC_X86_CPUID(0x80000000)
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cpu_exthigh=`echo $ax_cv_gcc_x86_cpuid_0x80000000 | cut -d ":" -f 1`
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if test "x$cpu_exthi" > "x80000004"; then
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AX_GCC_X86_CPUID(0x80000005) # For L1 cache
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l1_hexval=`echo $ax_cv_gcc_x86_cpuid_0x80000005 | cut -d ":" -f 4`
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ax_l1_size=$((0x$l1_hexval >> 24))
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fi
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if test "x$cpu_exthi" > "x80000005"; then
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AX_GCC_X86_CPUID(0x80000006) # For L2 cache
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l2_hexval=`echo $ax_cv_gcc_x86_cpuid_0x80000006 | cut -d ":" -f 3`
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ax_l2_size=$((0x$l2_hexval >> 16))
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fi
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if test "x$cpu_exthi" > "x80000005"; then
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AX_GCC_X86_CPUID(0x80000006) # For L3 cache
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l2_hexval=`echo $ax_cv_gcc_x86_cpuid_0x80000006 | cut -d ":" -f 4`
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ax_l2_size=$((0x$l2_hexval >> 18))*512
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fi
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fi
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#Or use sysctl
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sysctl_exe=
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if test -x /usr/sbin/sysctl ; then
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sysctl_exe=/usr/sbin/sysctl
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elif test -x /sbin/sysctl ; then
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sysctl_exe=/sbin/sysctl
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fi
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if test -n "$sysctl_exe"; then
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if test -z "$ax_l2_size" -o "$ax_l2_size" = "0"; then
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sysctl_out=`$sysctl_exe -n hw.l2cachesize 2>/dev/null`;
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if test ! -z "$sysctl_out"; then
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ax_l2_size=$(($sysctl_out / 1024))
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fi;
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fi
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if test -z "$ax_l1_size" -o "$ax_l1_size" = "0" ; then
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sysctl_out=`$sysctl_exe -n hw.l1dcachesize 2>/dev/null`;
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if test ! -z "$sysctl_out"; then
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ax_l1_size=$(($sysctl_out / 1024))
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fi;
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fi
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if test -z "$ax_l1_size" -o "ax_l1_size" = "0" ; then
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sysctl_out=`$sysctl_exe -n hw.l1cachesize 2>/dev/null`;
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if test ! -z "$sysctl_out"; then
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ax_l1_size=$(($sysctl_out / 1024))
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fi;
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fi
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fi
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fi
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test -z "$ax_l1_size" && ax_l1_size=0
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test -z "$ax_l2_size" && ax_l2_size=0
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test -z "$ax_l3_size" && ax_l3_size=$ax_l2_size
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# Keep only digits if there is a unit (ie 1024K -> 1024) and convert in Bytes
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AC_MSG_CHECKING(the L1 cache size)
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ax_l1_size=`echo $ax_l1_size | $SED 's/\([[0-9]]\)[[A-Za-z]]$/\1/g'`
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ax_l1_size=$(($ax_l1_size*1024))
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AC_MSG_RESULT( $ax_l1_size Bytes)
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AC_MSG_CHECKING(the L2 cache size)
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ax_l2_size=`echo $ax_l2_size | $SED 's/\([[0-9]]\)[[A-Za-z]]$/\1/g'`
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ax_l2_size=$(($ax_l2_size*1024))
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AC_MSG_RESULT( $ax_l2_size Bytes)
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AC_MSG_CHECKING(the L3 cache size)
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ax_l3_size=`echo $ax_l3_size | $SED 's/\([[0-9]]\)[[A-Za-z]]$/\1/g'`
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ax_l3_size=$(($ax_l3_size*1024))
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AC_MSG_RESULT( $ax_l3_size Bytes)
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M4RI_CPU_L1_CACHE=${ax_l1_size}
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M4RI_CPU_L2_CACHE=${ax_l2_size}
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M4RI_CPU_L3_CACHE=${ax_l3_size}
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AC_SUBST(M4RI_CPU_L1_CACHE)
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AC_SUBST(M4RI_CPU_L2_CACHE)
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AC_SUBST(M4RI_CPU_L3_CACHE)
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])
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