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annotate ovz_statshow.pl @ 2:4080b53fd4a2

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ovz_statshow: Works but vestat seems buggy
author Peter Gervai <grin@grin.hu>
date Mon, 23 Mar 2009 17:00:16 +0100
parents 068d0e1deb08
children 4cd907a693d1
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efb595e3b0a2 ovz_statshow v0.0
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1 #!/usr/bin/perl
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2 #$Id$
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3 #(C)Peter Gervai, 2009
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4 # email: grin.grin.hu
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5 #
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6 # Released under GPL v2 or later and CC-BY-SA-3.0
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7
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8 use strict;
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9 use warnings;
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10
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11 use IO::File;
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12
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13
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14 my $f_stat = "/proc/vz/vestat";
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15 my $stat_ver = "2.2";
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16 # jiffie per second ( zgrep ^CONFIG_HZ /proc/config.gz )
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17 my $jiffies = 100;
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19
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20 my @fields = (1,2,3,4,5,7,8);
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21 my @fieldname = qw( user nice sys up idle up_c used_c );
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22 my (%ve, %ve1);
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23
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24 my $cpu_mhz = qx( egrep '^cpu MHz' /proc/cpuinfo | head -n1 | awk '{print \$4}' );
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25 chomp $cpu_mhz;
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26 $cpu_mhz = $cpu_mhz * 1_048_576;
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27 print "Running on $cpu_mhz MHz CPU(s)\n";
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28
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30 while(1) {
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31 my $f = new IO::File "< $f_stat" or die $!;
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32
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33 my $fdata;
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34 # have to read one chunk at once :-/ length is arbitrary
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35 sysread $f, $fdata, 65535;
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36 $f->close;
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37
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38 my @vestat = split /\n/, $fdata;
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39
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40 if( $vestat[0] !~ /Version: $stat_ver/ ) {
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41 die "Unknown file version $vestat[0], required $stat_ver";
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42 }
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43 my $debug_proc = "";
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44 for my $i ( 2 .. $#vestat ) {
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45 my $l = $vestat[$i];
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46 #chomp $l;
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47 $l =~ s/^\s*(.*?)\s*$/$1/;
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48 #print "##$l##\n";
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49 $debug_proc .= "$l\n";
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50 my @d = split /\s+/, $l;
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51 # 0veid, 1user, 2nice, 3systm, 4uptime, <- jiffy
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52 # 5idle, (6strv), 7uptime, 8used, (9maxlat, 10totlat, 11numched) <- cycles
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53 $ve{$d[0]} = [ @d[0..11] ];
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54 }
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55
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56 for my $veid ( sort {$a<=>$b} keys %ve ) {
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57 if( defined( $ve1{$veid} ) ) {
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58 printf "%03d:", $veid;
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59 for my $i ( 0..$#fields ) {
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60 my $field = $fields[$i];
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61 #print "[$field,", $ve{$veid}, ",", $ve1{$veid} ,",", $ve{$veid}->[$field],",", $ve1{$veid}->[$field], "] ";
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62 my $val = $ve{$veid}->[$field] - $ve1{$veid}->[$field];
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63 printf "%6s(%3d)=", $fieldname[$i], $field;
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64
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65 if( $val < 0 ) {
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66 # debug
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67 print "\n#", $ve{$veid}->[$field], ' ', $ve1{$veid}->[$field], "#$_#\n";
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68 print "$debug_proc\n";
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69 }
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70
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71 if( $field < 5 ) {
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72 printf "%4d", &jiffie2ms( $val );
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73 } else {
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74 printf "%4d", &cycle2ms( $val );
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75 }
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76 print "; ";
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77 if( $field == 7 ) {
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78 printf "<%4d> ", &cycle2ms( $val - ($ve{$veid}->[5] - $ve1{$veid}->[5]) );
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79 }
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80 }
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81 print "\n";
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82 }
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83 $ve1{$veid} = $ve{$veid};
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84 }
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85 print "\n";
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86 sleep(1);
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87 }
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89
2
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90 sub cycle2ms ($) {
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91 return int( (shift) / $cpu_mhz * 1000 );
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92 }
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94
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95 sub jiffie2ms ($) {
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96 return int( (shift) / $jiffies * 1000 );
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97 }
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98