From: "xtkoba (Tee KOBAYASHI)" Date: 2021-08-29T03:19:28+00:00 Subject: [ruby-core:105083] [Ruby master Bug#18134] Memory leak with master Issue #18134 has been updated by xtkoba (Tee KOBAYASHI). I can confirm this, and also that the leak stops by reverting commit:0ef2923c2b9 (#16996). ``` $ ./miniruby bug18134.rb USER PID PPID VSIZE RSS WCHAN PC NAME u0_a116 12366 10224 50636 7388 poll_sched b6e3cd28 S ./miniruby Duped hash 500000 times USER PID PPID VSIZE RSS WCHAN PC NAME u0_a116 12366 10224 168728 125492 poll_sched b6e3cd28 S ./miniruby $ ./miniruby.revert bug18134.rb USER PID PPID VSIZE RSS WCHAN PC NAME u0_a116 12374 10224 50636 7388 poll_sched b6e34d28 S ./miniruby.revert Duped hash 500000 times USER PID PPID VSIZE RSS WCHAN PC NAME u0_a116 12374 10224 51608 8376 poll_sched b6e34d28 S ./miniruby.revert ``` BTW, the first line of the repro should be something like: ```ruby loops = (ARGV[0] || 500_000).to_i ``` ---------------------------------------- Bug #18134: Memory leak with master https://bugs.ruby-lang.org/issues/18134#change-93488 * Author: MSP-Greg (Greg L) * Status: Open * Priority: Normal * ruby -v: ruby 3.1.0dev (2021-08-26T10:47:48Z master ef10e8a1eb) [x64-mingw32] * Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN ---------------------------------------- While working on code to test Puma���s performance, I noticed a memory leak using WSL2 Ubuntu 20.04 and Ruby master. The leak seemed proportional to the number of requests made, and independent of the response size, either headers or body. Locally, I was running up to 2 million requests. The code used @ioquatix���s version of wrk and smem for measuring memory use. I ran GC.start and GC.compact before checking memory. The Puma configuration was using `fork`. I���ve got a lot of Ruby versions on Windows, but haven���t created the same setup for Ubuntu. So, I took the above code and ran it on GitHub Actions Ubuntu 20.04. Ruby 2.5.9, 2.7.4, and 3.0.2 did not have the memory leak, but master had the same leak I saw locally. Puma and one of its dependencies (nio4r) are both extension gems. Has there been an ABI change that might affect the code? I can try to bisect it if that would be helpful. Thanks, Greg -- https://bugs.ruby-lang.org/ Unsubscribe: