1
2
3
4
5
6
7
8
9
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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
# frozen_string_literal: true
module RubyVM::RJIT
# Return a Hash for \RJIT statistics. \--rjit-stats makes more information available.
def self.runtime_stats
stats = {}
# Insn exits
INSNS.each_value do |insn|
exits = C.rjit_insn_exits[insn.bin]
if exits > 0
stats[:"exit_#{insn.name}"] = exits
end
end
# Runtime stats
C.rb_rjit_runtime_counters.members.each do |member|
stats[member] = C.rb_rjit_counters.public_send(member)
end
stats[:vm_insns_count] = C.rb_vm_insns_count
# 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_rjit = stats[:rjit_insns_count] - stats[:side_exit_count]
stats[:total_insns_count] = retired_in_rjit + stats[:vm_insns_count]
stats[:ratio_in_rjit] = 100.0 * retired_in_rjit / stats[:total_insns_count]
else
stats.delete(:vm_insns_count)
end
stats
end
# :nodoc: all
class << self
private
# --yjit-stats at_exit
def print_stats
stats = runtime_stats
$stderr.puts("***RJIT: Printing RJIT statistics on exit***")
print_counters(stats, prefix: 'send_', prompt: 'method call exit reasons')
print_counters(stats, prefix: 'invokeblock_', prompt: 'invokeblock 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 "rjit_insns_count: #{format_number(13, stats[:rjit_insns_count])}"
$stderr.puts "ratio_in_rjit: #{format('%12.1f', stats[:ratio_in_rjit])}%" if stats.key?(:ratio_in_rjit)
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
# --yjit-trace-exits at_exit
def dump_trace_exits
filename = "#{Dir.pwd}/rjit_exit_locations.dump"
File.binwrite(filename, Marshal.dump(exit_traces))
$stderr.puts("RJIT exit locations dumped to:\n#{filename}")
end
# Convert rb_rjit_raw_samples and rb_rjit_line_samples into a StackProf format.
def exit_traces
results = C.rjit_exit_traces
raw_samples = results[:raw].dup
line_samples = results[:lines].dup
frames = results[:frames].dup
samples_count = 0
# Loop through the instructions and set the frame hash with the data.
# We use nonexistent.def for the file name, otherwise insns.def will be displayed
# and that information isn't useful in this context.
RubyVM::INSTRUCTION_NAMES.each_with_index do |name, frame_id|
frame_hash = { samples: 0, total_samples: 0, edges: {}, name: name, file: "nonexistent.def", line: nil, lines: {} }
results[:frames][frame_id] = frame_hash
frames[frame_id] = frame_hash
end
# Loop through the raw_samples and build the hashes for StackProf.
# The loop is based off an example in the StackProf documentation and therefore
# this functionality can only work with that library.
#
# Raw Samples:
# [ length, frame1, frame2, frameN, ..., instruction, count
#
# Line Samples
# [ length, line_1, line_2, line_n, ..., dummy value, count
i = 0
while i < raw_samples.length
stack_length = raw_samples[i] + 1
i += 1 # consume the stack length
prev_frame_id = nil
stack_length.times do |idx|
idx += i
frame_id = raw_samples[idx]
if prev_frame_id
prev_frame = frames[prev_frame_id]
prev_frame[:edges][frame_id] ||= 0
prev_frame[:edges][frame_id] += 1
end
frame_info = frames[frame_id]
frame_info[:total_samples] += 1
frame_info[:lines][line_samples[idx]] ||= [0, 0]
frame_info[:lines][line_samples[idx]][0] += 1
prev_frame_id = frame_id
end
i += stack_length # consume the stack
top_frame_id = prev_frame_id
top_frame_line = 1
sample_count = raw_samples[i]
frames[top_frame_id][:samples] += sample_count
frames[top_frame_id][:lines] ||= {}
frames[top_frame_id][:lines][top_frame_line] ||= [0, 0]
frames[top_frame_id][:lines][top_frame_line][1] += sample_count
samples_count += sample_count
i += 1
end
results[:samples] = samples_count
# Set missed_samples and gc_samples to 0 as their values
# don't matter to us in this context.
results[:missed_samples] = 0
results[:gc_samples] = 0
results
end
end
end
|
