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profiler.rb
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profiler.rb
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module Rubinius
module Profiler
##
# Interface to VM's instrumenting profiler.
class Instrumenter
include Stats::Units
attr_reader :info, :options
def self.available?
Rubinius::Tooling.available?
end
def self.active?
Rubinius::Tooling.active?
end
@loaded = false
def self.load
return if @loaded
Rubinius::Tooling.load File.expand_path("../profiler_vm", __FILE__)
@loaded = true
end
def initialize(options = {})
Instrumenter.load
@options = { :sort => :percent }
set_options options
set_options :full_report => true if Config["profiler.full_report"]
set_options :graph => true if Config["profiler.graph"]
if path = Config["profiler.json"]
set_options :json => path
end
if Config['profiler.cumulative_percentage']
set_options :cumulative_percentage => true
end
if Config['profiler.classes']
set_options :classes => true
end
end
# Set options for profiler output. Presently, the only option
# is :sort. It takes a single symbol or an array of symbols to
# specify the column(s) to sort by. The recognized symbols are:
#
# Symbol Profiler heading
# :percent % time
# :total_seconds cumulative seconds
# :self_seconds self seconds
# :calls calls
# :self_ms self ms/call
# :total_ms total ms/call
# :name name
#
# @todo Add options for GC allocation counts
def set_options(options)
@options.merge!(options)
end
def start
Rubinius::Tooling.enable
end
def __stop__
Rubinius::Tooling.disable
end
def stop
@info = __stop__
end
# Convenience method to profile snippets of code in a larger script or
# program. Enables the profiler and yields to the given block.
#
# pr = Rubinius::Profiler::Instrumenter.new
# pr.profile { # do some work here }
def profile(display = true)
start
yield if block_given?
stop
show if display
@info
end
SHORT_LINES = 45
def show(out=$stdout)
unless self.class.available? and @info
out.puts "No profiling data was available"
return
end
if options[:json]
json options[:json]
elsif options[:graph]
graph out
else
flat out
end
nil
end
def epilogue(out, size, calls)
unless options[:full_report] or size < SHORT_LINES
out.puts "\n#{comma(size-SHORT_LINES)} methods omitted"
end
out.puts "\n#{comma(size)} methods called a total of #{comma(calls)} times"
end
def flat(out)
keys = @info.keys.sort
keys.each do |t_id|
thread_flat out, t_id, @info[t_id]
puts
end
end
def thread_flat(out, t_id, info)
total_calls = 0
total = 0.0
all_selves = 0.0
# Because the info is actually in a tree form and we to just see it
# flat for each method, we need to go through and collect all the stats
# for each unique method.
info[:nodes].each do |n_id, data|
sub = data[4].inject(0) { |a,n| a + info[:nodes][n][1] }
meth = info[:methods][data[0]]
if cur = meth[:edge_total]
meth[:edge_total] = cur + sub
else
meth[:edge_total] = sub
end
end
data = info[:methods].values.map do |m|
cumulative = m[:cumulative]
method_total = m[:total]
edges_total = m[:edge_total]
self_total = method_total - edges_total
called = m[:called]
total += method_total
total_calls += called
all_selves += self_total
name = m[:name]
name = "#toplevel" if name == "<metaclass>#__script__ {}"
[ 0,
sec(cumulative),
sec(self_total),
called,
msec(self_total) / called,
msec(cumulative) / called,
name ]
end
all_selves = sec(all_selves)
if options[:cumulative_percentage]
data.each do |d|
d[0] = (d[1] / sec(info[:runtime])) * 100
end
else
data.each do |d|
d[0] = (d[2] / all_selves) * 100
end
end
columns = sort_order
data = data.sort_by do |row|
columns.map {|col| row[col] }
end.reverse
out.puts "Thread #{t_id}: total running time: #{sec(info[:runtime])}s"
out.puts ""
out.puts " % cumulative self self total"
out.puts " time seconds seconds calls ms/call ms/call name"
out.puts "------------------------------------------------------------"
report = options[:full_report] ? data : data.first(SHORT_LINES)
report.each do |d|
out.printf " %6s", ("%.2f" % d[0])
out.printf "%8.2f %8.2f %10d %8.2f %8.2f %s\n", *d.last(6)
end
epilogue out, data.size, total_calls
if options[:classes]
classes = Hash.new { |h,k| h[k] = 0.0 }
data.each do |row|
if m = /(.*)[#\.]/.match(row.last)
classes[m[1]] += ((row[2] / all_selves) * 100)
end
end
out.puts "\nUsage percentage by class:"
sorted = classes.to_a.sort_by { |row| row[1] }.reverse
sorted.each do |row|
out.printf "%6s: %s\n", ("%.2f" % row[1]), row[0]
end
end
end
def json(path)
File.open path, "w" do |f|
t_final = @info.size - 1
t_idx = 0
f.puts "["
@info.each do |t_id, info|
f.puts "{"
f.puts " \"thread_id\": #{t_id},"
f.puts " \"runtime\": #{info[:runtime]},"
f.puts " \"total_nodes\": #{info[:total_nodes]},"
roots = info[:roots].map { |x| x.to_s.dump }.join(',')
f.puts " \"roots\": [ #{roots} ],"
f.puts " \"nodes\": {"
idx = 0
final = info[:nodes].size - 1
info[:nodes].each do |n_id, data|
f.puts " \"#{n_id}\": {"
f.puts " \"method\": #{data[0]}, \"total\": #{data[1]}, \"called\": #{data[2]},"
f.puts " \"total_nodes\": #{data[3]}, \"sub_nodes\": [ #{data[4].join(', ')} ]"
if idx == final
f.puts " }"
else
f.puts " },"
end
idx += 1
end
f.puts " },"
f.puts " \"methods\": {"
idx = 0
final = info[:methods].size - 1
info[:methods].each do |m_id, m|
f.puts " \"#{m_id}\": {"
f.puts " \"name\": \"#{m[:name]}\", \"file\": \"#{m[:file]}\", \"line\": #{m[:line] || 0},"
f.puts " \"cumulative\": #{m[:cumulative]}, \"total\": #{m[:total]}, \"called\": #{m[:called]}"
if idx == final
f.puts " }"
else
f.puts " },"
end
idx += 1
end
f.puts " }"
if t_idx == t_final
f.puts "}"
else
f.puts "},"
end
t_idx += 1
end
f.puts "]"
end
puts "Wrote JSON to: #{path}"
end
def graph(out)
keys = @info.keys.sort
keys.each do |t_id|
thread_graph out, t_id, @info[t_id]
out.puts
end
end
# Prints an entry for each method, along with the method's callers and
# the methods called. The entry is delimited by the dashed lines. The
# line for the method itself is called the "primary" line. The callers
# are printed above the primary line and the methods called are printed
# below.
def thread_graph(out, t_id, info)
total_calls = 0
run_total = 0.0
data = info[:nodes]
methods = info[:methods]
run_total = info[:runtime].to_f
all_callers = Hash.new { |h,k| h[k] = [] }
data.each do |n_id, n_data|
n_data[4].each do |sub|
all_callers[sub] << n_id
end
end
indexes = data.keys.sort do |a, b|
data[b][1] <=> data[a][1]
end
indexes = indexes.first(SHORT_LINES) unless options[:full_report]
shown_indexes = {}
indexes.each_with_index do |id, index|
shown_indexes[id] = index + 1
end
out.puts "===== Thread #{t_id} ====="
out.puts "Total running time: #{sec(info[:runtime])}s"
out.puts "index % time self children called name"
out.puts "----------------------------------------------------------"
primary = "%-7s%6s %8.2f %9.2f %8d %s [%d]\n"
secondary = " %8.2f %9.2f %8d %s%s\n"
indexes.each do |id|
m_id, total, called, tn, sub_nodes = data[id]
# The idea is to report information about caller as a ratio of the
# time it called method.
#
callers = all_callers[id].sort_by do |c_id|
clr = data[c_id]
clr[total]
end
callers = callers.first(10) unless options[:full_report]
callers.each do |c_id|
clr_m_id, clr_total, clr_called, clr_tn, clr_sub = data[c_id]
sub_total = clr_sub.inject(0) { |a,s| a + data[s][1] }
self_total = clr_total - sub_total
out.printf(secondary, sec(self_total),
sec(sub_total),
clr_called,
methods[clr_m_id][:name],
graph_method_index(shown_indexes[c_id]))
end
# Now the primary line.
children = sub_nodes.inject(0) { |a,s| a + data[s][1] }
# children = method[:cumulative] * (method[:edges_total].to_f / method[:total])
self_total = total - children
out.printf primary, ("[%d]" % shown_indexes[id]),
percentage(total, run_total, 1, nil),
sec(self_total),
sec(children),
called,
methods[m_id][:name],
shown_indexes[id]
# Same as caller, the idea is to report information about callee methods
# as a ratio of the time it was called from method.
#
edges = sub_nodes.sort_by do |e_id|
if edge = data[e_id]
edge[1]
else
0.0
end
end
edges = edges.last(10) unless options[:full_report]
# method[:edges] = method[:edges].first(10) unless options[:full_report]
edges.reverse_each do |e_id|
c_m_id, c_total, c_called, c_tn, c_sub_nodes = data[e_id]
grandchildren = c_sub_nodes.inject(0) { |a,s| a + data[s][1] }
grandchildren = 0 if grandchildren < 0
self_total = c_total - grandchildren
out.printf secondary, sec(self_total),
sec(grandchildren),
c_called,
methods[c_m_id][:name],
graph_method_index(shown_indexes[e_id])
end
out.puts "-------------------------------------------------------"
end
epilogue out, data.size, total_calls
end
def graph_method_index(index)
index ? " [#{index}]" : ""
end
HEADER_INDEX = {
:percent => 0,
:total_seconds => 1,
:self_seconds => 2,
:calls => 3,
:self_ms => 4,
:total_ms => 5,
:name => 6
}
def sort_order
# call to_i so if unrecognized symbol is passed, column will be percent
Array(@options[:sort]).map { |header| HEADER_INDEX[header].to_i }
end
end
end
end