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docker_cpu: handle cgroup v2

This commit is contained in:
Andreas Perhab 2023-03-16 11:13:29 +01:00
parent 5ca6f09fb7
commit 3b4acf90df
1 changed files with 44 additions and 0 deletions
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44
plugins/docker/docker_cpu
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@ -80,6 +80,50 @@ for my $i (1 .. $#containers)
push @result, {'name'=>$name, 'label'=>$label, 'total_cpu_ns'=>$total_cpu_ns, 'ncpu'=>$#ncpu};
}
}
elsif (open($file, '<', "/sys/fs/cgroup/system.slice/docker-$id.scope/cpu.stat"))
{
# handle cpu stats with cgroup v2
# hexdump -C /sys/fs/cgroup/system.slice/docker-01fc4fa4d6cf7ad66efabc818dd1d99cc51fd8cebf6ba2345988b145029df09a.scope/cpu.stat
# 00000000 75 73 61 67 65 5f 75 73 65 63 20 32 35 37 36 33 |usage_usec 25763|
# 00000010 37 34 31 0a 75 73 65 72 5f 75 73 65 63 20 32 30 |741.user_usec 20|
# 00000020 37 34 31 35 37 37 0a 73 79 73 74 65 6d 5f 75 73 |741577.system_us|
# 00000030 65 63 20 35 30 32 32 31 36 33 0a 6e 72 5f 70 65 |ec 5022163.nr_pe|
# 00000040 72 69 6f 64 73 20 30 0a 6e 72 5f 74 68 72 6f 74 |riods 0.nr_throt|
# 00000050 74 6c 65 64 20 30 0a 74 68 72 6f 74 74 6c 65 64 |tled 0.throttled|
# 00000060 5f 75 73 65 63 20 30 0a |_usec 0.|
# 00000068
my $total_cpu_ns = <$file>;
$total_cpu_ns =~ s/^usage_usec ([0-9]+).*/$1/;
$total_cpu_ns *= 1000;
close $file;
if (open($file, '<', "/sys/fs/cgroup/system.slice/docker-$id.scope/cpuset.cpus.effective"))
{
# hexdump -C /sys/fs/cgroup/system.slice/docker-5915a2718628754f9185a052b96c4ac4249692269ad03c54f9037cd9e530f93c.scope/cpuset.cpus.effective
# 00000000 30 2d 31 31 0a |0-11.|
# 00000005
#
# docker run --cpuset-cpus 0,2,3,5,6,7,8 --rm bash sleep 60
# 00000000 30 2c 32 2d 33 2c 35 2d 38 0a |0,2-3,5-8.|
# 0000000a
my $cpus = <$file>;
$cpus =~ s/\s+$//;
close $file;
my $ncpu = 0;
for $c (split /,/, $cpus)
{
@cpu_range = split /-/, $c;
if ($#cpu_range == 0)
{
$ncpu += 1;
}
else
{
$ncpu += $cpu_range[1] - $cpu_range[0] + 1;
}
}
push @result, {'name'=>$name, 'label'=>$label, 'total_cpu_ns'=>$total_cpu_ns, 'ncpu'=>$ncpu};
}
}
}
if (defined $ARGV[0] and $ARGV[0] eq "config")