Class: OsCtl::Cli::Ps::Main

Inherits:
Command
  • Object
show all
Defined in:
lib/osctl/cli/ps/main.rb

Defined Under Namespace

Classes: SlowOsProcess

Constant Summary collapse

READ_TIMEOUT = 
1

Instance Method Summary collapse

Methods inherited from Command

#cli_opt, #format_output, #osctld_call, #osctld_fmt, #osctld_open, #osctld_resp, run

Instance Method Details

#get_process_list(ctids, filters) ⇒ Object (protected) 



103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
 
# File 'lib/osctl/cli/ps/main.rb', line 103

def get_process_list(ctids, filters)
   = TTY::Spinner.new("[:spinner] :title", clear: true)
  .update(title: 'Listing processes...')
  .auto_spin

  list_queue = OsCtl::Lib::Queue.new
  list_thread = Thread.new { list_processes(list_queue, ctids, filters) }
  update_queue = OsCtl::Lib::Queue.new
  update_thread = Thread.new { update_loop(update_queue) }
  last_os_proc = nil
  last_time = nil
  slow_os_procs = []
  @update_count = false
  total = 0
  error = false
  ret = nil

  loop do
    v = list_queue.pop(timeout: READ_TIMEOUT)

    if v.is_a?(Array)
      ret = v
      ret << slow_os_procs
      break
    end

    os_proc = v

    if os_proc.nil? && !error
      msg =
        if last_os_proc.nil?
          'Taking long to list /proc entries'
        else
          sprintf('Taking long to process pid %d', last_os_proc.pid)
        end

      set_title(, msg)

      if last_os_proc
        slow_os_procs << SlowOsProcess.new(last_os_proc, 0)
        last_time = Time.now - READ_TIMEOUT
      end

      error = true
      next
    end

    if os_proc && last_time
      slow_os_procs.last.duration = Time.now - last_time
      last_time = nil
    end

    total += 1
    last_os_proc = os_proc

    if os_proc && error
      set_title(, sprintf('Listing processes... %8d', total))
      error = false
    elsif os_proc
      set_title(, sprintf('Listing processes... %8d', total))
      @update_count = false
    end
  end

  if last_time
    slow_os_procs.last.duration = Time.now - last_time
    last_time = nil
  end

  update_queue << :stop
  list_thread.join
  update_thread.join
  .stop
  ret
end

#list_processes(queue, ctids, filters) ⇒ Object (protected) 



183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
 
# File 'lib/osctl/cli/ps/main.rb', line 183

def list_processes(queue, ctids, filters)
  pools = {}
  pl = OsCtl::Lib::ProcessList.new(parse_stat: false, parse_status: false) do |p|
    # Signal which pid we're on
    queue << p

    # Filter processes
    pool, id = p.ct_id

    if !ctids.empty? \
       && !(pool.nil? && ctids[:host]) \
       && !(pool && (ctids.has_key?(id) || ctids.has_key?("#{pool}:#{id}")))
      next(false)
    end

    # Parse process files
    p.parse
    p.cmdline

    next(false) if filters.detect { |f| !f.match?(p) }

    pools[pool] = true if pool
    true
  end

  queue << [pl, pools]
end

#print_slow_processes(slow_os_procs) ⇒ Object (protected) 



81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
 
# File 'lib/osctl/cli/ps/main.rb', line 81

def print_slow_processes(slow_os_procs)
  warn "\nSlow processes:"
  slow_os_procs.sort do |a, b|
    b.duration <=> a.duration
  end.each do |slow_proc|
    begin
      pool, id = slow_proc.os_process.ct_id
      ctid = pool.nil? ? '[host]' : "#{pool}:#{id}"
    rescue OsCtl::Lib::Exceptions::OsProcessNotFound
      ctid = "[unknown]"
    end

    warn(sprintf(
      '%16s: %10d %-18s %.2fs',
      ctid,
      slow_proc.os_process.pid,
      slow_proc.os_process.name,
      slow_proc.duration,
    ))
  end
end

#run ⇒ Object 



10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
 
# File 'lib/osctl/cli/ps/main.rb', line 10

def run
  param_selector = OsCtl::Lib::Cli::ParameterSelector.new(
    all_params: Ps::Columns::COLS,
  )

  if opts[:list]
    puts param_selector
    return
  end

  require_args!(optional: %w(id), strict: false)

  filters = opts[:parameter].map { |v| Ps::Filter.new(v) }

  ctids = {}

  args.each do |arg|
    if arg == '-'
      ctids[:host] = true
    elsif arg.index(':')
      pool, id = arg.split(':')
      ctids["#{pool}:#{id}"] = true
    else
      pool = gopts[:pool]
      id = arg

      if pool
        ctids["#{pool}:#{id}"] = true
      else
        ctids[id] = true
      end
    end
  end

  pl, pools, slow_os_procs = get_process_list(ctids, filters)

  default_cols =
    if ctids.size == 1
      Ps::Columns::DEFAULT_ONE_CT
    elsif pools.size == 1
      Ps::Columns::DEFAULT_ONE_POOL
    else
      Ps::Columns::DEFAULT_MULTIPLE_POOLS
    end

  out_cols, out_data = Ps::Columns.generate(
    pl,
    param_selector.parse_option(opts[:output], default_params: default_cols),
    gopts[:parsable],
  )

  OsCtl::Lib::Cli::OutputFormatter.print(
    out_data,
    cols: out_cols,
    layout: :columns,
    header: opts['hide-header'] ? false : true,
    sort: opts[:sort] && param_selector.parse_option(opts[:sort]),
  )

  if pl.size > 1
    warn "#{pl.size} processes"
  elsif pl.size == 1
    warn "#{pl.size} process"
  else
    warn "No processes found"
  end

  print_slow_processes(slow_os_procs) if slow_os_procs.any?
end

#set_title(spinner, str) ⇒ Object (protected) 



179
180
181
 
# File 'lib/osctl/cli/ps/main.rb', line 179

def set_title(, str)
  .tokens[:title] = sprintf('%-40s', str)
end

#update_loop(queue) ⇒ Object (protected) 



211
212
213
214
215
216
 
# File 'lib/osctl/cli/ps/main.rb', line 211

def update_loop(queue)
  loop do
    return if queue.pop(timeout: 0.2) == :stop
    @update_count = true
  end
end