]>
git.proxmox.com Git - pve-common.git/blob - src/PVE/CpuSet.pm
7 our $MAX_CPUID = 256; # should be enough for the next years
12 my $class = ref($this) || $this;
14 my $self = bless { members
=> {} }, $class;
20 my ($this, $cgroup, $kind) = @_;
24 my $filename = "/sys/fs/cgroup/cpuset/$cgroup/cpuset.$kind";
25 my $set_text = PVE
::Tools
::file_read_firstline
($filename) // '';
27 my $cpuset = $this->new();
29 my $members = $cpuset->{members
};
33 foreach my $part (split(/,/, $set_text)) {
34 if ($part =~ /^\s*(\d+)(?:-(\d+))?\s*$/) {
35 my ($from, $to) = ($1, $2);
37 die "cpu id '$from' is out of range\n" if $from >= $MAX_CPUID;
38 die "cpu id '$to' is out of range\n" if $to >= $MAX_CPUID;
39 die "invalid range: $part ($to < $from)\n" if $to < $from;
40 for (my $i = $from; $i <= $to; $i++) {
45 die "invalid range: $part\n";
49 die "got empty cpuset for cgroup '$cgroup'\n"
56 my ($self, $cgroup) = @_;
58 my $filename = "/sys/fs/cgroup/cpuset/$cgroup/cpuset.cpus";
61 my @members = $self->members();
62 foreach my $cpuid (@members) {
63 $value .= ',' if length($value);
67 die "unable to write empty cpu set\n" if !length($value);
69 open(my $fh, '>', $filename) || die "failed to open '$filename' - $!\n";
70 PVE
::Tools
::safe_print
($filename, $fh, "$value\n");
75 my ($self, @members) = @_;
79 foreach my $cpu (@members) {
80 die "cpu id '$cpu' is out of range\n" if $cpu >= $MAX_CPUID;
81 next if $self->{members
}->{$cpu};
82 $self->{members
}->{$cpu} = 1;
90 my ($self, @members) = @_;
94 foreach my $cpu (@members) {
95 die "cpu id '$cpu' is out of range\n" if $cpu >= $MAX_CPUID;
96 next if !$self->{members
}->{$cpu};
97 delete $self->{members
}->{$cpu};
105 my ($self, $cpuid) = @_;
107 return $self->{members
}->{$cpuid};
110 # members: this list is always sorted!
114 return sort keys %{$self->{members
}};
120 return scalar(keys %{$self->{members
}});
124 my ($self, $set2) = @_;
126 my $members1 = $self->{members
};
127 my $members2 = $set2->{members
};
129 foreach my $id (keys %$members1) {
130 return 0 if !$members2->{$id};
132 foreach my $id (keys %$members2) {
133 return 0 if !$members1->{$id};
142 my @members = $self->members();
146 foreach my $cpu (@members) {
147 if (!defined($last)) {
148 $last = $next = $cpu;
149 } elsif (($next + 1) == $cpu) {
152 $res .= ',' if length($res);
153 $res .= "$last-$next";
154 $last = $next = undef;
158 if (defined($last)) {
159 $res .= ',' if length($res);
160 if ($last != $next) {
161 $res .= "$last-$next";