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Commit | Line | Data |
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1 | package PVE::CpuSet; | |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | use PVE::Tools; | |
6 | use PVE::ProcFSTools; | |
7 | ||
8 | sub new { | |
9 | my ($this) = @_; | |
10 | ||
11 | my $class = ref($this) || $this; | |
12 | ||
13 | my $self = bless { members => {} }, $class; | |
14 | ||
15 | return $self; | |
16 | } | |
17 | ||
18 | sub new_from_cgroup { | |
19 | my ($this, $cgroup, $kind) = @_; | |
20 | ||
21 | $kind //= 'cpus'; | |
22 | ||
23 | my $filename = "/sys/fs/cgroup/cpuset/$cgroup/cpuset.$kind"; | |
24 | my $set_text = PVE::Tools::file_read_firstline($filename) // ''; | |
25 | ||
26 | my $cpuset = $this->new(); | |
27 | ||
28 | my $members = $cpuset->{members}; | |
29 | ||
30 | my $count = 0; | |
31 | ||
32 | foreach my $part (split(/,/, $set_text)) { | |
33 | if ($part =~ /^\s*(\d+)(?:-(\d+))?\s*$/) { | |
34 | my ($from, $to) = ($1, $2); | |
35 | $to //= $1; | |
36 | die "invalid range: $part ($to < $from)\n" if $to < $from; | |
37 | for (my $i = $from; $i <= $to; $i++) { | |
38 | $members->{$i} = 1; | |
39 | $count++; | |
40 | }; | |
41 | } else { | |
42 | die "invalid range: $part\n"; | |
43 | } | |
44 | } | |
45 | ||
46 | die "got empty cpuset for cgroup '$cgroup'\n" | |
47 | if !$count; | |
48 | ||
49 | return $cpuset; | |
50 | } | |
51 | ||
52 | sub write_to_cgroup { | |
53 | my ($self, $cgroup) = @_; | |
54 | ||
55 | my $filename = "/sys/fs/cgroup/cpuset/$cgroup/cpuset.cpus"; | |
56 | ||
57 | my $value = ''; | |
58 | my @members = $self->members(); | |
59 | foreach my $cpuid (@members) { | |
60 | $value .= ',' if length($value); | |
61 | $value .= $cpuid; | |
62 | } | |
63 | ||
64 | die "unable to write empty cpu set\n" if !length($value); | |
65 | ||
66 | open(my $fh, '>', $filename) || die "failed to open '$filename' - $!\n"; | |
67 | PVE::Tools::safe_print($filename, $fh, "$value\n"); | |
68 | close($fh) || die "failed to close '$filename' - $!\n"; | |
69 | } | |
70 | ||
71 | sub insert { | |
72 | my ($self, @members) = @_; | |
73 | ||
74 | my $count = 0; | |
75 | ||
76 | foreach my $cpu (@members) { | |
77 | next if $self->{members}->{$cpu}; | |
78 | $self->{members}->{$cpu} = 1; | |
79 | $count++; | |
80 | } | |
81 | ||
82 | return $count; | |
83 | } | |
84 | ||
85 | sub delete { | |
86 | my ($self, @members) = @_; | |
87 | ||
88 | my $count = 0; | |
89 | ||
90 | foreach my $cpu (@members) { | |
91 | next if !$self->{members}->{$cpu}; | |
92 | delete $self->{members}->{$cpu}; | |
93 | $count++; | |
94 | } | |
95 | ||
96 | return $count; | |
97 | } | |
98 | ||
99 | sub has { | |
100 | my ($self, $cpuid) = @_; | |
101 | ||
102 | return $self->{members}->{$cpuid}; | |
103 | } | |
104 | ||
105 | # members: this list is always sorted! | |
106 | sub members { | |
107 | my ($self) = @_; | |
108 | ||
109 | return sort { $a <=> $b } keys %{$self->{members}}; | |
110 | } | |
111 | ||
112 | sub size { | |
113 | my ($self) = @_; | |
114 | ||
115 | return scalar(keys %{$self->{members}}); | |
116 | } | |
117 | ||
118 | sub is_equal { | |
119 | my ($self, $set2) = @_; | |
120 | ||
121 | my $members1 = $self->{members}; | |
122 | my $members2 = $set2->{members}; | |
123 | ||
124 | foreach my $id (keys %$members1) { | |
125 | return 0 if !$members2->{$id}; | |
126 | } | |
127 | foreach my $id (keys %$members2) { | |
128 | return 0 if !$members1->{$id}; | |
129 | } | |
130 | ||
131 | return 1; | |
132 | } | |
133 | ||
134 | sub short_string { | |
135 | my ($self) = @_; | |
136 | ||
137 | my @members = $self->members(); | |
138 | ||
139 | my $res = ''; | |
140 | my ($last, $next); | |
141 | foreach my $cpu (@members) { | |
142 | if (!defined($last)) { | |
143 | $last = $next = $cpu; | |
144 | } elsif (($next + 1) == $cpu) { | |
145 | $next = $cpu; | |
146 | } else { | |
147 | $res .= ',' if length($res); | |
148 | if ($last != $next) { | |
149 | $res .= "$last-$next"; | |
150 | } else { | |
151 | $res .= "$last"; | |
152 | } | |
153 | $last = $next = $cpu; | |
154 | } | |
155 | } | |
156 | ||
157 | if (defined($last)) { | |
158 | $res .= ',' if length($res); | |
159 | if ($last != $next) { | |
160 | $res .= "$last-$next"; | |
161 | } else { | |
162 | $res .= "$last"; | |
163 | } | |
164 | } | |
165 | ||
166 | return $res; | |
167 | } | |
168 | ||
169 | 1; |