| 1 | #! /bin/sh |
| 2 | |
| 3 | proc_stat_parse() { |
| 4 | proc_stat="$1" |
| 5 | n='[0-9]\+' |
| 6 | echo "$proc_stat" \ |
| 7 | | grep "^cpu$n $n $n $n $n $n $n $n $n $n $n$" \ |
| 8 | | awk ' |
| 9 | { |
| 10 | cpu = $1; |
| 11 | user = $2; |
| 12 | sys = $4; |
| 13 | idle = $5; |
| 14 | |
| 15 | total = user + sys + idle; |
| 16 | busy = user + sys; |
| 17 | |
| 18 | if (NR > 1) {printf " "}; |
| 19 | |
| 20 | out = sprintf("%s %d %d", cpu, total, busy); |
| 21 | #print out >> "cpu_usage_debug.txt"; |
| 22 | printf "%s", out; |
| 23 | } |
| 24 | END { |
| 25 | #print "" >> "cpu_usage_debug.txt"; |
| 26 | print ""; |
| 27 | } |
| 28 | ' |
| 29 | } |
| 30 | |
| 31 | calc_delta() { |
| 32 | for proc_stat in "$1" "$2"; do |
| 33 | proc_stat_parse "$proc_stat" |
| 34 | done \ |
| 35 | | awk ' |
| 36 | { |
| 37 | t = NR; |
| 38 | for (i = 1; i <= (NF - 2); i += 3) { |
| 39 | cpu_count[t]++; |
| 40 | cpu_id = $i; # For occasional debugging |
| 41 | total = $(i + 1); |
| 42 | busy = $(i + 2); |
| 43 | cpu[cpu_count[t], "total", t] = total; |
| 44 | cpu[cpu_count[t], "busy" , t] = busy; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | END { |
| 49 | for (c=1; c<=cpu_count[2]; c++) { |
| 50 | total_1 = cpu[c, "total", 1]; |
| 51 | total_2 = cpu[c, "total", 2]; |
| 52 | busy_1 = cpu[c, "busy" , 1]; |
| 53 | busy_2 = cpu[c, "busy" , 2]; |
| 54 | total_d = total_2 - total_1; |
| 55 | busy_d = busy_2 - busy_1; |
| 56 | percent_busy = (busy_d / total_d) * 100; |
| 57 | |
| 58 | #printf(\ |
| 59 | # "c: %d, total_1: %f total_2: %f, total_d: %f\n", |
| 60 | # c, total_1, total_2, total_d \ |
| 61 | #) >> "cpu_usage_debug.txt"; |
| 62 | #printf(\ |
| 63 | # "c: %d, busy_1: %f busy_2: %f, busy_d: %f\n", |
| 64 | # c, busy_1, busy_2, busy_d \ |
| 65 | #) >> "cpu_usage_debug.txt"; |
| 66 | #printf(\ |
| 67 | # "c: %d, percent_busy: %f\n", |
| 68 | # c, percent_busy \ |
| 69 | #) >> "cpu_usage_debug.txt"; |
| 70 | |
| 71 | if (c > 1) {printf " "}; |
| 72 | out = sprintf("%3.0f%%", percent_busy) |
| 73 | #printf "c: %d, out: %s\n", c, out >> "cpu_usage_debug.txt"; |
| 74 | printf "%s", out; |
| 75 | } |
| 76 | #print "" >> "cpu_usage_debug.txt"; |
| 77 | print ""; |
| 78 | } |
| 79 | ' |
| 80 | } |
| 81 | |
| 82 | main() { |
| 83 | last_proc_stat="$HOME/var/run/cpu_usage_from_proc_since_last_check/last_proc_stat" |
| 84 | |
| 85 | if [ ! -f "$last_proc_stat" ] |
| 86 | then |
| 87 | mkdir -p `dirname "$last_proc_stat"` |
| 88 | cat /proc/stat > "$last_proc_stat" |
| 89 | sleep 0.1 |
| 90 | fi |
| 91 | |
| 92 | previous=`cat $last_proc_stat`; |
| 93 | cat /proc/stat > "$last_proc_stat" |
| 94 | current=`cat $last_proc_stat`; |
| 95 | |
| 96 | calc_delta "$previous" "$current" |
| 97 | } |
| 98 | |
| 99 | main $@ |