Re: [問題] script 紀錄資源

[coldnew (夜影)]

※ 引述《paulyanzi (消失)》之銘言：
: 請問要怎麼利用 script 去記錄某支程式每一秒吃的資源呢?
: 例如去記錄吃的 CPU, MEM, (不知道還有什麼可以記錄來比較?)
: 謝謝

這是以前用 perl 寫的紀錄CPU使用率的腳本, 資訊是從 /proc 取得的


#!/usr/bin/env perl
# utilities for CPU Usage, written by coldnew

use strict;
use warnings;

my $IDLE_PREV = 0;
my $TOTAL_PREV = 0;

while (1) {
        open(STAT, "</proc/stat");
        my @CPU = split(/\s+/, <STAT>);
        close(STAT);

        shift(@CPU);                # remove first element
        my $IDLE = $CPU[3];         # get idle CPU time

        # Calculate total CPU time
        my $TOTAL = 0;
        foreach my $i (@CPU) {
                $TOTAL += $i;
        }

        $IDLE -= $IDLE_PREV;
        $TOTAL -= $TOTAL_PREV;

        my $CPU_USAGE    = 100 * ($TOTAL-$IDLE) / $TOTAL ;

        printf "CPU:%4.2f%% \n", $CPU_USAGE;

        $IDLE_PREV = $IDLE;
        $TOTAL_PREV = $TOTAL;

        sleep 2;
}

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