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| 1 | +#!/bin/sh |
| 2 | + |
| 3 | +# Display memory usage information on FreeBSD |
| 4 | +# This function is a shell re-writting of the perl script: |
| 5 | +## freebsd-memory -- List Total System Memory Usage |
| 6 | +## Copyright (c) 2003-2004 Ralf S. Engelschall <rse@engelschall.com> |
| 7 | +## http://www.cyberciti.biz/files/scripts/freebsd-memory.pl.txt |
| 8 | + |
| 9 | +# round the physical memory size to the next power of two which is |
| 10 | +# reasonable for memory cards. We do this by first determining the |
| 11 | +# guessed memory card size under the assumption that usual computer |
| 12 | +# hardware has an average of a maximally eight memory cards installed |
| 13 | +# and those are usually of equal size. |
| 14 | + |
| 15 | +# Strict script |
| 16 | +set -eu |
| 17 | + |
| 18 | +mem_rounded () { |
| 19 | + mem_size=$1 |
| 20 | + chip_size=1 |
| 21 | + chip_guess=$(echo "$mem_size / 8 - 1" | bc) |
| 22 | + while [ $chip_guess != 0 ]; do |
| 23 | + chip_guess=$(echo "$chip_guess / 2" | bc) |
| 24 | + chip_size=$(echo "$chip_size * 2" | bc) |
| 25 | + done |
| 26 | + mem_round=$(echo "( $mem_size / $chip_size + 1 ) * $chip_size" | bc) |
| 27 | + echo $mem_round |
| 28 | + exit 0 |
| 29 | +} |
| 30 | + |
| 31 | +free_memory () { |
| 32 | + # determine the individual known information |
| 33 | + # NOTICE: forget hw.usermem, it is just (hw.physmem - vm.stats.vm.v_wire_count). |
| 34 | + # NOTICE: forget vm.stats.misc.zero_page_count, it is just the subset of |
| 35 | + # vm.stats.vm.v_free_count which is already pre-zeroed. |
| 36 | + mem_phys=$(sysctl -n hw.physmem) |
| 37 | + set +e |
| 38 | + mem_hw=$(mem_rounded $mem_phys) |
| 39 | + set -e |
| 40 | + sysctl_pagesize=$(sysctl -n hw.pagesize) |
| 41 | + mem_all=$(echo "$(sysctl -n vm.stats.vm.v_page_count) * $sysctl_pagesize" | bc) |
| 42 | + mem_wire=$(echo "$(sysctl -n vm.stats.vm.v_wire_count) * $sysctl_pagesize" | bc) |
| 43 | + mem_active=$(echo "$(sysctl -n vm.stats.vm.v_active_count) * $sysctl_pagesize" | bc) |
| 44 | + mem_inactive=$(echo "$(sysctl -n vm.stats.vm.v_inactive_count) * $sysctl_pagesize" | bc) |
| 45 | + if sysctl -q vm.stats.vm.v_cache_count > /dev/null 2>&1 ; then |
| 46 | + mem_cache=$(echo "$(sysctl -n vm.stats.vm.v_cache_count) * $sysctl_pagesize" | bc) |
| 47 | + mem_laundry="" |
| 48 | + else |
| 49 | + mem_laundry=$(echo "$(sysctl -n vm.stats.vm.v_laundry_count) * $sysctl_pagesize" | bc) |
| 50 | + mem_cache="" |
| 51 | + fi |
| 52 | + mem_free=$(echo "$(sysctl -n vm.stats.vm.v_free_count) * $sysctl_pagesize" | bc) |
| 53 | + # determine the individual unknown information |
| 54 | + if [ -n "${mem_cache}" ]; then |
| 55 | + mem_gap_vm=$(echo "$mem_all - ( $mem_wire + $mem_active + \ |
| 56 | + $mem_inactive + $mem_cache + $mem_free )" | bc) |
| 57 | + else |
| 58 | + mem_gap_vm=$(echo "$mem_all - ( $mem_wire + $mem_active + \ |
| 59 | + $mem_inactive + $mem_laundry + $mem_free )" | bc) |
| 60 | + fi |
| 61 | + mem_gap_sys=$(echo "$mem_phys - $mem_all" | bc) |
| 62 | + mem_gap_hw=$(echo "$mem_hw - $mem_phys" | bc) |
| 63 | + |
| 64 | + # determine logical summary information |
| 65 | + mem_total=$mem_hw |
| 66 | + if [ -n "${mem_cache}" ]; then |
| 67 | + mem_avail=$(echo "$mem_inactive + $mem_cache + $mem_free" | bc) |
| 68 | + else |
| 69 | + mem_avail=$(echo "$mem_inactive + $mem_laundry + $mem_free" | bc) |
| 70 | + fi |
| 71 | + mem_used=$(echo "$mem_total - $mem_avail" | bc) |
| 72 | + |
| 73 | + # Swap |
| 74 | + swap_info=$(swapctl -sk) |
| 75 | + swap_total=$(echo "$(echo "$swap_info" | awk 'BEGIN {FS=" "} {print $2}' | bc) * 1024" | bc) |
| 76 | + swap_used=$(echo "$(echo "$swap_info" | awk 'BEGIN {FS=" "} {print $3}' | bc) * 1024" | bc) |
| 77 | + swap_avail=$(echo "$swap_total - $swap_used" | bc) |
| 78 | + |
| 79 | + # print system results |
| 80 | + printf "SYSTEM MEMORY INFORMATION:\n" |
| 81 | + printf "mem_wire: %12d (%7dMB) [%3d%%] %s\n" $mem_wire \ |
| 82 | + $(echo "$mem_wire / ( 1024 * 1024 )" | bc) $(echo "$mem_wire \ |
| 83 | + * 100 / $mem_all" | bc) "Wired: disabled for paging out" |
| 84 | + printf "mem_active: + %12d (%7dMB) [%3d%%] %s\n" $mem_active \ |
| 85 | + $(echo "$mem_active / ( 1024 * 1024 )" | bc) $(echo "$mem_active \ |
| 86 | + * 100 / $mem_all" | bc) "Active: recently referenced" |
| 87 | + printf "mem_inactive:+ %12d (%7dMB) [%3d%%] %s\n" $mem_inactive \ |
| 88 | + $(echo "$mem_inactive / ( 1024 * 1024 )" | bc) $(echo "$mem_inactive \ |
| 89 | + * 100 / $mem_all" | bc) "Inactive: recently not referenced" |
| 90 | + if [ -n "${mem_cache}" ]; then |
| 91 | + printf "mem_cache: + %12d (%7dMB) [%3d%%] %s\n" $mem_cache \ |
| 92 | + $(echo "$mem_cache / ( 1024 * 1024 )" | bc) $(echo "$mem_cache \ |
| 93 | + * 100 / $mem_all" | bc) "Cached: almost avail. for allocation" |
| 94 | + else |
| 95 | + printf "mem_laundry: + %12d (%7dMB) [%3d%%] %s\n" $mem_laundry \ |
| 96 | + $(echo "$mem_laundry / ( 1024 * 1024 )" | bc) $(echo "$mem_laundry \ |
| 97 | + * 100 / $mem_all" | bc) "Laundry: Pages eligible for laundering" |
| 98 | + fi |
| 99 | + printf "mem_free: + %12d (%7dMB) [%3d%%] %s\n" $mem_free \ |
| 100 | + $(echo "$mem_free / ( 1024 * 1024 )" | bc) $(echo "$mem_free \ |
| 101 | + * 100 / $mem_all" | bc) "Free: fully available for allocation" |
| 102 | + printf "mem_gap_vm: + %12d (%7dMB) [%3d%%] %s\n" $mem_gap_vm \ |
| 103 | + $(echo "$mem_gap_vm / ( 1024 * 1024 )" | bc) $(echo "$mem_gap_vm \ |
| 104 | + * 100 / $mem_all" | bc) "Memory gap: UNKNOWN" |
| 105 | + printf "______________ ____________ ___________ ______\n" |
| 106 | + printf "mem_all: = %12d (%7dMB) [100%%] %s\n" $mem_all \ |
| 107 | + $(echo "$mem_all / ( 1024 * 1024 )" | bc) "Total real memory managed" |
| 108 | + printf "mem_gap_sys: + %12d (%7dMB) %s\n" $mem_gap_sys \ |
| 109 | + $(echo "$mem_gap_sys / ( 1024 * 1024 )" | bc) "Memory gap: Kernel?!" |
| 110 | + printf "______________ ____________ ___________\n" |
| 111 | + printf "mem_phys: = %12d (%7dMB) %s\n" $mem_phys \ |
| 112 | + $(echo "$mem_phys / ( 1024 * 1024 )" | bc) "Total real memory available" |
| 113 | + printf "mem_gap_hw: + %12d (%7dMB) %s\n" $mem_gap_hw \ |
| 114 | + $(echo "$mem_gap_hw / ( 1024 * 1024 )" | bc) "Memory gap: Segment Mappings?!" |
| 115 | + printf "______________ ____________ ___________\n" |
| 116 | + printf "mem_hw: = %12d (%7dMB) %s\n" $mem_hw \ |
| 117 | + $(echo "$mem_hw / ( 1024 * 1024 )" | bc) "Total real memory installed" |
| 118 | + printf "\n" |
| 119 | + |
| 120 | + printf "SYSTEM MEMORY SUMMARY:\n" |
| 121 | + printf "mem_used: %12d (%7dMB) [%3d%%] %s\n" $mem_used \ |
| 122 | + $(echo "$mem_used / ( 1024 * 1024 )" | bc) $(echo "$mem_used \ |
| 123 | + * 100 / $mem_total" | bc) "Logically used memory" |
| 124 | + printf "mem_avail: + %12d (%7dMB) [%3d%%] %s\n" $mem_avail \ |
| 125 | + $(echo "$mem_avail / ( 1024 * 1024 )" | bc) $(echo "$mem_avail \ |
| 126 | + * 100 / $mem_total" | bc) "Logically available memory" |
| 127 | + printf "______________ ____________ __________ _______\n" |
| 128 | + printf "mem_total: = %12d (%7dMB) [100%%] %s\n" $mem_total \ |
| 129 | + $(echo "$mem_total / ( 1024 * 1024 )" | bc) "Logically total memory" |
| 130 | + printf "\n" |
| 131 | + if [ $swap_total != 0 ]; then |
| 132 | + printf "SWAP SUMMARY:\n" |
| 133 | + printf "swap_used: %12d (%7dMB) [%3d%%] %s\n" $swap_used \ |
| 134 | + $(echo "$swap_used / ( 1024 * 1024 )" | bc) $(echo "$swap_used \ |
| 135 | + * 100 / $swap_total" | bc) "Used" |
| 136 | + printf "swap_avail: + %12d (%7dMB) [%3d%%] %s\n" $swap_avail \ |
| 137 | + $(echo "$swap_avail / ( 1024 * 1024 )" | bc) $(echo "$swap_avail \ |
| 138 | + * 100 / $swap_total" | bc) "Available" |
| 139 | + printf "______________ ____________ ___________\n" |
| 140 | + printf "swap_total: = %12d (%7dMB) [100%%] %s\n" $swap_total \ |
| 141 | + $(echo "$swap_total / ( 1024 * 1024 )" | bc) "Total" |
| 142 | + fi |
| 143 | + exit 0 |
| 144 | +} |
| 145 | + |
| 146 | +################### |
| 147 | +## Main function ## |
| 148 | +################### |
| 149 | + |
| 150 | +free_memory |
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