98 lines
2.7 KiB
Ruby
Executable file
98 lines
2.7 KiB
Ruby
Executable file
#!/usr/bin/env ruby
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# frozen_string_literal: true
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####
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# Loads GitLab application classes with a variety of GC settings and prints
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# GC stats and timing data to standard out as CSV.
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#
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# The degree of parallelism can be increased by setting the PAR environment
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# variable (default: 2).
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require 'benchmark'
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SETTINGS = {
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'DEFAULTS' => [''],
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# Default: 10_000
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'RUBY_GC_HEAP_INIT_SLOTS' => %w[100000 1000000 5000000],
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# Default: 1.8
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'RUBY_GC_HEAP_GROWTH_FACTOR' => %w[1.2 1 0.8],
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# Default: 0 (disabled)
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'RUBY_GC_HEAP_GROWTH_MAX_SLOTS' => %w[10000 100000 1000000],
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# Default: 2.0
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'RUBY_GC_HEAP_OLDOBJECT_LIMIT_FACTOR' => %w[2.5 1.5 1],
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# Default: 4096 (= 2^12)
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'RUBY_GC_HEAP_FREE_SLOTS' => %w[16384 2048 0],
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# Default: 0.20 (20%)
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'RUBY_GC_HEAP_FREE_SLOTS_MIN_RATIO' => %w[0.1 0.01 0.001],
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# Default: 0.40 (40%)
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'RUBY_GC_HEAP_FREE_SLOTS_GOAL_RATIO' => %w[0.2 0.01 0.001],
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# Default: 0.65 (65%)
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'RUBY_GC_HEAP_FREE_SLOTS_MAX_RATIO' => %w[0.2 0.02 0.002],
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# Default: 16MB
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'RUBY_GC_MALLOC_LIMIT' => %w[8388608 4194304 1048576],
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# Default: 32MB
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'RUBY_GC_MALLOC_LIMIT_MAX' => %w[16777216 8388608 1048576],
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# Default: 1.4
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'RUBY_GC_MALLOC_LIMIT_GROWTH_FACTOR' => %w[1.6 1 0.8],
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# Default: 16MB
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'RUBY_GC_OLDMALLOC_LIMIT' => %w[8388608 4194304 1048576],
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# Default: 128MB
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'RUBY_GC_OLDMALLOC_LIMIT_MAX' => %w[33554432 16777216 1048576],
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# Default: 1.2
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'RUBY_GC_OLDMALLOC_LIMIT_GROWTH_FACTOR' => %w[1.4 1 0.8]
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}.freeze
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USED_GCSTAT_KEYS = [
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:minor_gc_count,
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:major_gc_count,
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:heap_live_slots,
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:heap_free_slots,
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:total_allocated_pages,
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:total_freed_pages,
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:malloc_increase_bytes,
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:malloc_increase_bytes_limit,
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:oldmalloc_increase_bytes,
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:oldmalloc_increase_bytes_limit
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].freeze
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CSV_USED_GCSTAT_KEYS = USED_GCSTAT_KEYS.join(',')
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CSV_HEADER = "setting,value,#{CSV_USED_GCSTAT_KEYS},RSS,gc_time_s,cpu_utime_s,cpu_stime_s,real_time_s\n"
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SCRIPT_PATH = __dir__
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RAILS_ROOT = "#{SCRIPT_PATH}/../../../"
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def collect_stats(setting, value)
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warn "Testing #{setting} = #{value} ..."
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env = {
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setting => value,
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'RAILS_ROOT' => RAILS_ROOT,
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'SETTING_CSV' => "#{setting},#{value}",
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'GC_STAT_KEYS' => CSV_USED_GCSTAT_KEYS
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}
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system(env, 'ruby', "#{SCRIPT_PATH}/print_gc_stats.rb")
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end
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par = ENV['PAR']&.to_i || 2
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batch_size = (SETTINGS.size.to_f / par).ceil
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batches = SETTINGS.each_slice(batch_size)
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warn "Requested parallelism: #{par} (batches: #{batches.size}, batch size: #{batch_size})"
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puts CSV_HEADER
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elapsed = Benchmark.realtime do
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threads = batches.each_with_index.map do |settings_batch, n|
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Thread.new do
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settings_batch.each do |setting, values|
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values.each do |v|
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collect_stats(setting, v)
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end
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end
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end
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end
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threads.each(&:join)
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end
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warn "All done in #{elapsed} sec"
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