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January 3, 2015 01:29
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| # Minimal example that demonstrates a memory leak in Celluloid. | |
| # Adapted from @debrasetton example: https://github.com/mperham/sidekiq/issues/2107 | |
| # Adapted from @grosser example: https://github.com/mperham/sidekiq/blob/master/examples/leak.rb | |
| # Run with LEAK=0 for no memory leak or LEAK=1 for memory leak, like so: | |
| # LEAK=1 ruby ./leak.rb > /dev/null | |
| require 'celluloid/autostart' | |
| Celluloid.logger = nil | |
| $counter = 0 | |
| $jobs = 5_000 | |
| class MyWorker | |
| include Celluloid | |
| def perform | |
| report_memory | |
| check_done | |
| # Normally, we'd perform some work here: | |
| # ... | |
| # Now, assume that the something went wrong for whatever reason and | |
| # we'd like to retry the job. | |
| if ENV['LEAK'].to_i == 1 | |
| # If the error is raised using this line, it will cause a memory leak. | |
| raise Exception.new("Exception - Job failed for some reason") | |
| else | |
| # On the other hand, if this line is used, memory usage remains ok. | |
| raise "RuntimeError - Job failed for some reason" | |
| end | |
| end | |
| def report_memory | |
| $counter += 1 | |
| if $counter % 100 == 0 | |
| GC.start | |
| memory = `ps -o rss -p #{Process.pid}`.chomp.split("\n").last.to_i | |
| $stderr.puts "#{$counter.to_s.ljust(5)} - Memory usage: #{memory}" | |
| end | |
| end | |
| def check_done | |
| if $counter > $jobs | |
| exit | |
| end | |
| end | |
| end | |
| pool = MyWorker.pool | |
| # Enqueue jobs | |
| $jobs.times { pool.async.perform } | |
| while pool.busy_size > 0 | |
| sleep(1) | |
| end |
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| LEAK=0 bundle exec ruby ./script.rb > /dev/null | |
| 100 - Memory usage: 25388 | |
| 200 - Memory usage: 25672 | |
| 302 - Memory usage: 25704 | |
| 402 - Memory usage: 25704 | |
| 502 - Memory usage: 25740 | |
| 602 - Memory usage: 25984 | |
| 702 - Memory usage: 26112 | |
| 801 - Memory usage: 26144 | |
| 901 - Memory usage: 26136 | |
| 1000 - Memory usage: 26320 | |
| 1101 - Memory usage: 26312 | |
| 1201 - Memory usage: 26312 | |
| 1301 - Memory usage: 26312 | |
| 1400 - Memory usage: 26312 | |
| 1502 - Memory usage: 26320 | |
| 1602 - Memory usage: 26320 | |
| 1702 - Memory usage: 26312 | |
| 1802 - Memory usage: 26312 | |
| 1902 - Memory usage: 26312 | |
| 2003 - Memory usage: 26356 | |
| 2102 - Memory usage: 26388 | |
| 2200 - Memory usage: 26396 | |
| 2302 - Memory usage: 26404 | |
| 2400 - Memory usage: 26412 | |
| 2500 - Memory usage: 26412 | |
| 2600 - Memory usage: 26412 | |
| 2701 - Memory usage: 26432 | |
| 2802 - Memory usage: 26432 | |
| 2902 - Memory usage: 26468 | |
| 3002 - Memory usage: 26460 | |
| 3101 - Memory usage: 26460 | |
| 3202 - Memory usage: 26512 | |
| 3300 - Memory usage: 26512 | |
| 3402 - Memory usage: 26512 | |
| 3501 - Memory usage: 26512 | |
| 3601 - Memory usage: 26520 | |
| 3702 - Memory usage: 26512 | |
| 3800 - Memory usage: 26520 | |
| 3903 - Memory usage: 26520 | |
| 4001 - Memory usage: 26640 | |
| 4102 - Memory usage: 26632 | |
| 4202 - Memory usage: 26640 | |
| 4303 - Memory usage: 26640 | |
| 4400 - Memory usage: 26640 | |
| 4503 - Memory usage: 26640 | |
| 4600 - Memory usage: 26640 | |
| 4701 - Memory usage: 26640 | |
| 4801 - Memory usage: 26632 | |
| 4904 - Memory usage: 26632 | |
| 5000 - Memory usage: 26632 | |
| LEAK=1 bundle exec ruby ./script.rb > /dev/null | |
| 102 - Memory usage: 28120 | |
| 200 - Memory usage: 33864 | |
| 302 - Memory usage: 39700 | |
| 401 - Memory usage: 45352 | |
| 503 - Memory usage: 51440 | |
| 600 - Memory usage: 56876 | |
| 700 - Memory usage: 62920 | |
| 802 - Memory usage: 68732 | |
| 901 - Memory usage: 74736 | |
| 1000 - Memory usage: 80360 | |
| 1100 - Memory usage: 86220 | |
| 1201 - Memory usage: 92096 | |
| 1301 - Memory usage: 97892 | |
| 1402 - Memory usage: 103660 | |
| 1502 - Memory usage: 109512 | |
| 1600 - Memory usage: 114952 | |
| 1702 - Memory usage: 121052 | |
| 1801 - Memory usage: 127256 | |
| 1901 - Memory usage: 132868 | |
| 2000 - Memory usage: 138472 | |
| 2101 - Memory usage: 144476 | |
| 2202 - Memory usage: 150176 | |
| 2301 - Memory usage: 155796 | |
| 2400 - Memory usage: 161428 | |
| 2502 - Memory usage: 167448 | |
| 2600 - Memory usage: 172836 | |
| 2701 - Memory usage: 178804 | |
| 2803 - Memory usage: 184696 | |
| 2902 - Memory usage: 190484 | |
| 3002 - Memory usage: 196080 | |
| 3101 - Memory usage: 201980 | |
| 3202 - Memory usage: 207812 | |
| 3300 - Memory usage: 213228 | |
| 3401 - Memory usage: 219296 | |
| 3500 - Memory usage: 224936 | |
| 3600 - Memory usage: 230856 | |
| 3701 - Memory usage: 237540 | |
| 3802 - Memory usage: 243492 | |
| 3900 - Memory usage: 249012 | |
| 4002 - Memory usage: 255104 | |
| 4100 - Memory usage: 260792 | |
| 4201 - Memory usage: 266544 | |
| 4302 - Memory usage: 272428 | |
| 4401 - Memory usage: 277904 | |
| 4502 - Memory usage: 284144 | |
| 4602 - Memory usage: 289648 | |
| 4703 - Memory usage: 295508 | |
| 4801 - Memory usage: 301120 | |
| 4902 - Memory usage: 307012 | |
| 5000 - Memory usage: 312684 |
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