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137 lines
3.5 KiB
Ruby
137 lines
3.5 KiB
Ruby
#!/usr/bin/env ruby
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# from: https://gist.github.com/kenn/5105061/raw/ac7ebc6be7008c35b72560cc4e05b7cc14eb4919/memstats.rb
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#------------------------------------------------------------------------------
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# Aggregate Print useful information from /proc/[pid]/smaps
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#
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# pss - Roughly the amount of memory that is "really" being used by the pid
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# swap - Amount of swap this process is currently using
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#
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# Reference:
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# http://www.mjmwired.net/kernel/Documentation/filesystems/proc.txt#361
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#
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# Example:
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# # ./memstats.rb 4386
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# Process: 4386
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# Command Line: /usr/bin/mongod -f /etc/mongo/mongod.conf
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# Memory Summary:
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# private_clean 107,132 kB
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# private_dirty 2,020,676 kB
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# pss 2,127,860 kB
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# rss 2,128,536 kB
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# shared_clean 728 kB
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# shared_dirty 0 kB
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# size 149,281,668 kB
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# swap 1,719,792 kB
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#------------------------------------------------------------------------------
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class Mapping
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FIELDS = %w[ size rss shared_clean shared_dirty private_clean private_dirty swap pss ]
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attr_reader :address_start
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attr_reader :address_end
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attr_reader :perms
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attr_reader :offset
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attr_reader :device_major
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attr_reader :device_minor
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attr_reader :inode
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attr_reader :region
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attr_accessor :size
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attr_accessor :rss
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attr_accessor :shared_clean
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attr_accessor :shared_dirty
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attr_accessor :private_dirty
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attr_accessor :private_clean
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attr_accessor :swap
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attr_accessor :pss
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def initialize( lines )
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FIELDS.each do |field|
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self.send("#{field}=", 0)
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end
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parse_first_line( lines.shift )
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lines.each do |l|
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parse_field_line(l)
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end
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end
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def parse_first_line( line )
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parts = line.strip.split
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@address_start, @address_end = parts[0].split("-")
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@perms = parts[1]
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@offset = parts[2]
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@device_major, @device_minor = parts[3].split(":")
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@inode = parts[4]
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@region = parts[5] || "anonymous"
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end
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def parse_field_line( line )
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parts = line.strip.split
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field = parts[0].downcase.sub(':','')
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if respond_to? "#{field}="
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value = Float(parts[1]).to_i
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self.send( "#{field}=", value )
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end
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end
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end
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def consume_mapping( map_lines, totals )
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m = Mapping.new( map_lines )
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Mapping::FIELDS.each do |field|
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totals[field] += m.send( field )
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end
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return m
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end
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abort 'usage: memstats [pid]' unless ARGV.first
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pid = ARGV.shift.to_i
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totals = Hash.new(0)
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mappings = []
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File.open( "/proc/#{pid}/smaps" ) do |smaps|
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map_lines = []
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loop do
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break if smaps.eof?
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line = smaps.readline.strip
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case line
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when /\w+:\s+/
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map_lines << line
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when /[0-9a-f]+:[0-9a-f]+\s+/
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if map_lines.size > 0 then
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mappings << consume_mapping( map_lines, totals )
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end
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map_lines.clear
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map_lines << line
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else
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break
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end
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end
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end
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# http://rubyforge.org/snippet/download.php?type=snippet&id=511
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def format_number( n )
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n.to_s.gsub(/(\d)(?=\d{3}+(?:\.|$))(\d{3}\..*)?/,'\1,\2')
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end
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def get_commandline( pid )
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commandline = IO.read( "/proc/#{pid}/cmdline" ).split("\0")
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if commandline.first =~ /java$/ then
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loop { break if commandline.shift == "-jar" }
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return "[java] #{commandline.shift}"
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end
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return commandline.join(' ')
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end
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puts "#{"Process:".ljust(20)} #{pid}"
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puts "#{"Command Line:".ljust(20)} #{get_commandline(pid)}"
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puts "Memory Summary:"
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totals.keys.sort.each do |k|
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puts " #{k.ljust(20)} #{format_number( totals[k] ).rjust(12)} kB"
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end
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