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# frozen_string_literal: true
module RubyVM::MJIT
def self.runtime_stats
stats = {}
# Insn exits
INSNS.each_value do |insn|
exits = C.mjit_insn_exits[insn.bin]
if exits > 0
stats[:"exit_#{insn.name}"] = exits
end
end
# Runtime stats
C.rb_mjit_runtime_counters.members.each do |member|
stats[member] = C.rb_mjit_counters.public_send(member)
end
# Other stats are calculated here
stats[:side_exit_count] = stats.select { |name, _count| name.start_with?('exit_') }.sum(&:last)
if stats[:vm_insns_count] > 0
retired_in_mjit = stats[:mjit_insns_count] - stats[:side_exit_count]
stats[:total_insns_count] = retired_in_mjit + stats[:vm_insns_count]
stats[:ratio_in_mjit] = 100.0 * retired_in_mjit / stats[:total_insns_count]
end
stats
end
class << self
private
def print_stats
stats = runtime_stats
$stderr.puts("***MJIT: Printing MJIT statistics on exit***")
print_counters(stats, prefix: 'send_', prompt: 'method call exit reasons')
print_counters(stats, prefix: 'invokesuper_', prompt: 'invokesuper exit reasons')
print_counters(stats, prefix: 'getblockpp_', prompt: 'getblockparamproxy exit reasons')
print_counters(stats, prefix: 'getivar_', prompt: 'getinstancevariable exit reasons')
print_counters(stats, prefix: 'setivar_', prompt: 'setinstancevariable exit reasons')
print_counters(stats, prefix: 'optaref_', prompt: 'opt_aref exit reasons')
print_counters(stats, prefix: 'optgetconst_', prompt: 'opt_getconstant_path exit reasons')
print_counters(stats, prefix: 'expandarray_', prompt: 'expandarray exit reasons')
$stderr.puts "compiled_block_count: #{format_number(13, stats[:compiled_block_count])}"
$stderr.puts "side_exit_count: #{format_number(13, stats[:side_exit_count])}"
$stderr.puts "total_insns_count: #{format_number(13, stats[:total_insns_count])}" if stats.key?(:total_insns_count)
$stderr.puts "vm_insns_count: #{format_number(13, stats[:vm_insns_count])}" if stats.key?(:vm_insns_count)
$stderr.puts "mjit_insns_count: #{format_number(13, stats[:mjit_insns_count])}"
$stderr.puts "ratio_in_mjit: #{format('%12.1f', stats[:ratio_in_mjit])}%" if stats.key?(:ratio_in_mjit)
print_exit_counts(stats)
end
def print_counters(stats, prefix:, prompt:)
$stderr.puts("#{prompt}: ")
counters = stats.filter { |key, _| key.start_with?(prefix) }
counters.filter! { |_, value| value != 0 }
counters.transform_keys! { |key| key.to_s.delete_prefix(prefix) }
if counters.empty?
$stderr.puts(" (all relevant counters are zero)")
return
end
counters = counters.to_a
counters.sort_by! { |(_, counter_value)| counter_value }
longest_name_length = counters.max_by { |(name, _)| name.length }.first.length
total = counters.sum { |(_, counter_value)| counter_value }
counters.reverse_each do |(name, value)|
percentage = value.fdiv(total) * 100
$stderr.printf(" %*s %s (%4.1f%%)\n", longest_name_length, name, format_number(10, value), percentage)
end
end
def print_exit_counts(stats, how_many: 20, padding: 2)
exits = stats.filter_map { |name, count| [name.to_s.delete_prefix('exit_'), count] if name.start_with?('exit_') }.to_h
return if exits.empty?
top_exits = exits.sort_by { |_name, count| -count }.first(how_many).to_h
total_exits = exits.values.sum
$stderr.puts "Top-#{top_exits.size} most frequent exit ops (#{format("%.1f", 100.0 * top_exits.values.sum / total_exits)}% of exits):"
name_width = top_exits.map { |name, _count| name.length }.max + padding
count_width = top_exits.map { |_name, count| format_number(10, count).length }.max + padding
top_exits.each do |name, count|
ratio = 100.0 * count / total_exits
$stderr.puts "#{format("%#{name_width}s", name)}: #{format_number(count_width, count)} (#{format('%4.1f', ratio)}%)"
end
end
# Format large numbers with comma separators for readability
def format_number(pad, number)
integer, decimal = number.to_s.split('.')
d_groups = integer.chars.reverse.each_slice(3)
with_commas = d_groups.map(&:join).join(',').reverse
[with_commas, decimal].compact.join('.').rjust(pad, ' ')
end
end
end
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