Class: OsCtl::Cli::Top::Host

Inherits:
Top::Container
  • Object
show all
Defined in:
lib/osctl/cli/top/host.rb

Defined Under Namespace

Classes: Cpu

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(iostat_reader) ⇒ Host

Returns a new instance of Host.

Parameters:

  • iostat_reader (OsCtl::Lib::Zfs::IOStat, nil) 


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# File 'lib/osctl/cli/top/host.rb', line 60

def initialize(iostat_reader)
  super(id: '[host]', pool: nil, group_path: '', state: 'running')
  @iostat_reader = iostat_reader
  @pools = []
  @cpu = []
  @zfs = []
  @objsets = nil
  @netifs = :all
  @netif_stats = OsCtl::Lib::NetifStats.new
end

Instance Attribute Details

#iostat_reader ⇒ Object (readonly, protected)

Returns the value of attribute iostat_reader.



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# File 'lib/osctl/cli/top/host.rb', line 108

def iostat_reader
  @iostat_reader
end

#netif_stats ⇒ Object (readonly)

Returns the value of attribute netif_stats.



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# File 'lib/osctl/cli/top/host.rb', line 57

def netif_stats
  @netif_stats
end

#objsets ⇒ Object (readonly)

Returns the value of attribute objsets.



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# File 'lib/osctl/cli/top/host.rb', line 57

def objsets
  @objsets
end

#pools ⇒ Object (readonly)

Returns the value of attribute pools.



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# File 'lib/osctl/cli/top/host.rb', line 57

def pools
  @pools
end

Instance Method Details

#container? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/osctl/cli/top/host.rb', line 75

def container?
  false
end

#cpu_result ⇒ Object 



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# File 'lib/osctl/cli/top/host.rb', line 98

def cpu_result
  @cpu[1].diff(@cpu[0])
end

#diff_arcstats(current, previous) ⇒ Object (protected)

Parameters:



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# File 'lib/osctl/cli/top/host.rb', line 143

def diff_arcstats(current, previous)
  {
    arc: {
      c_max: current.c_max,
      c: current.c,
      size: current.size,
      hit_rate: current.hit_rate(previous),
      misses: current.misses(previous)
    },
    l2arc: {
      size: current.l2_size,
      asize: current.l2_asize,
      hit_rate: current.l2_hit_rate(previous),
      misses: current.l2_misses(previous)
    }
  }
end

#diff_zfs(current, previous) ⇒ Object (protected)

Parameters:

  • current (Hash)
  • previous (Hash) 


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# File 'lib/osctl/cli/top/host.rb', line 134

def diff_zfs(current, previous)
  {
    arcstats: diff_arcstats(current[:arcstats], previous[:arcstats]),
    iostat: current[:iostat] && get_iostat(current[:iostat])
  }
end

#get_iostat(current) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/host.rb', line 161

def get_iostat(current)
  {
    io_read: current.io_read,
    io_written: current.io_written,
    bytes_read: current.bytes_read,
    bytes_written: current.bytes_written
  }
end

#measure(subsystems) ⇒ Object 



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# File 'lib/osctl/cli/top/host.rb', line 79

def measure(subsystems)
  netif_stats.reset
  measure_objsets
  super(self, subsystems)
  measure_host_cpu_hz
  measure_zfs
end

#measure_host_cpu_hz ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/host.rb', line 110

def measure_host_cpu_hz
  f = File.open('/proc/stat')
  str = f.readline
  f.close

  values = str.strip.split
  @cpu << Cpu.new(* values[1..].map(&:to_i))
  @cpu.shift if @cpu.size > 2
end

#measure_objsets ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/host.rb', line 128

def measure_objsets
  @objsets = OsCtl::Lib::Zfs::ObjsetStats.read_pools(pools)
end

#measure_zfs ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/host.rb', line 120

def measure_zfs
  @zfs << {
    arcstats: Top::ArcStats.new,
    iostat: iostat_reader && iostat_reader.current_all
  }
  @zfs.shift if @zfs.size > 2
end

#result(mode, meminfo, lavg) ⇒ Object 



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# File 'lib/osctl/cli/top/host.rb', line 87

def result(mode, meminfo, lavg)
  ret = super(mode)

  # memory from the root cgroup does not account for all used memory
  ret[:memory] = meminfo.used * 1024

  ret[:nproc] = lavg.total

  ret
end

#running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/osctl/cli/top/host.rb', line 71

def running?
  true
end

#zfs_result ⇒ Object 



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# File 'lib/osctl/cli/top/host.rb', line 102

def zfs_result
  diff_zfs(@zfs[1], @zfs[0])
end