Railway•16mo ago

YJIT Ruby 3.2

I have a Rails app deployed on Railway using Ruby 3.2 with nixpacks. How can I enable the Ruby to be compiled with YJIT enabled?

Solution:

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15 Replies

Percy•16mo ago

Project ID: d1c85c02-8ca5-43c3-adc6-4a24cb066e33

macwilko•16mo ago

d1c85c02-8ca5-43c3-adc6-4a24cb066e33

Solution

Brody•16mo ago

is this helpful?

macwilko•16mo ago

Thankyou I’ll try it and reply here

#7 [stage-0  3/15] COPY .nixpacks/nixpkgs-293a28df6d7ff3dec1e61e37cc4ee6e6c0fb0847.nix .nixpacks/nixpkgs-293a28df6d7ff3dec1e61e37cc4ee6e6c0fb0847.nix
#7 CACHED
 
#8 [stage-0  4/15] RUN nix-env -if .nixpacks/nixpkgs-293a28df6d7ff3dec1e61e37cc4ee6e6c0fb0847.nix && nix-collect-garbage -d
#8 CACHED
 
#9 [stage-0  5/15] RUN apt-get update && apt-get install -y --no-install-recommends default-libmysqlclient-dev procps default-libmysqlclient-dev git curl autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm6 libgdbm-dev libdb-dev
#9 CACHED
 
#10 [stage-0  6/15] RUN  curl -fsSL https://github.com/rbenv/rbenv-installer/raw/HEAD/bin/rbenv-installer | bash -s stable && printf '\neval "$(~/.rbenv/bin/rbenv init -)"' >> /root/.profile && . /root/.profile && rbenv install 3.2.2 && rbenv global 3.2.2 && gem install bundler:2.4.6
 
#10 1.149 Installing rbenv with git...
#10 1.160 Initialized empty Git repository in /root/.rbenv/.git/
#10 1.160 hint: Using 'master' as the name for the initial branch. This default branch name
#10 1.160 hint: is subject to change. To configure the initial branch name to use in all
#10 1.160 hint: of your new repositories, which will suppress this warning, call:
#10 1.160 hint:
#10 1.160 hint:     git config --global init.defaultBranch <name>
#10 1.160 hint:
 
#10 1.160 hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
#10 1.160 hint: 'development'. The just-created branch can be renamed via this command:
#10 1.160 hint:
#10 1.160 hint:     git branch -m <name>
#10 1.172 Updating origin
 
#10 1.808 From https://github.com/rbenv/rbenv
#10 1.808  * [new branch]      master     -> origin/master
#10 1.836  * [new tag]         v0.1.0     -> v0.1.0
#10 1.836  * [new tag]         v0.1.1     -> v0.1.1
#10 1.836  * [new tag]         v0.1.2     -> v0.1.2
#10 1.836  * [new tag]         v0.2.0     -> v0.2.0
#10 1.836  * [new tag]         v0.2.1     -> v0.2.1
#10 1.836  * [new tag]         v0.3.0     -> v0.3.0
#10 1.836  * [new tag]         v0.4.0     -> v0.4.0
#10 1.836  * [new tag]         v1.0.0     -> v1.0.0
#10 1.836  * [new tag]         v1.1.0     -> v1.1.0
 
#10 1.836  * [new tag]         v1.1.1     -> v1.1.1
#10 1.836  * [new tag]         v1.1.2     -> v1.1.2
#10 1.836  * [new tag]         v1.2.0     -> v1.2.0
#10 1.861 Already on 'master'
#10 1.861 Branch 'master' set up to track remote branch 'master' from 'origin'.
 
#10 1.884
#10 1.884 Installing ruby-build with git...
#10 1.900 Cloning into '/root/.rbenv/plugins/ruby-build'...
 
#10 2.960
#10 2.960 All done!
#10 2.962 Note that this installer does NOT edit your shell configuration files:
#10 2.962 1. Run `~/.rbenv/bin/rbenv init' to view instructions on how to configure rbenv for your shell.
#10 2.962 2. Launch a new terminal window after editing shell configuration files.
#10 2.962
 
#10 3.210 To follow progress, use 'tail -f /tmp/ruby-build.20230721073358.132.log' or pass --verbose
 
#10 3.244 Downloading ruby-3.2.2.tar.gz...
#10 3.244 -> https://cache.ruby-lang.org/pub/ruby/3.2/ruby-3.2.2.tar.gz
 
#10 5.642 Installing ruby-3.2.2...
 
#10 340.3 Installed ruby-3.2.2 to /root/.rbenv/versions/3.2.2
#10 340.3
 
#10 341.3
#10 341.3 NOTE: to activate this Ruby version as the new default, run: rbenv global 3.2.2

#7 [stage-0  3/15] COPY .nixpacks/nixpkgs-293a28df6d7ff3dec1e61e37cc4ee6e6c0fb0847.nix .nixpacks/nixpkgs-293a28df6d7ff3dec1e61e37cc4ee6e6c0fb0847.nix
#7 CACHED
 
#8 [stage-0  4/15] RUN nix-env -if .nixpacks/nixpkgs-293a28df6d7ff3dec1e61e37cc4ee6e6c0fb0847.nix && nix-collect-garbage -d
#8 CACHED
 
#9 [stage-0  5/15] RUN apt-get update && apt-get install -y --no-install-recommends default-libmysqlclient-dev procps default-libmysqlclient-dev git curl autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm6 libgdbm-dev libdb-dev
#9 CACHED
 
#10 [stage-0  6/15] RUN  curl -fsSL https://github.com/rbenv/rbenv-installer/raw/HEAD/bin/rbenv-installer | bash -s stable && printf '\neval "$(~/.rbenv/bin/rbenv init -)"' >> /root/.profile && . /root/.profile && rbenv install 3.2.2 && rbenv global 3.2.2 && gem install bundler:2.4.6
 
#10 1.149 Installing rbenv with git...
#10 1.160 Initialized empty Git repository in /root/.rbenv/.git/
#10 1.160 hint: Using 'master' as the name for the initial branch. This default branch name
#10 1.160 hint: is subject to change. To configure the initial branch name to use in all
#10 1.160 hint: of your new repositories, which will suppress this warning, call:
#10 1.160 hint:
#10 1.160 hint:     git config --global init.defaultBranch <name>
#10 1.160 hint:
 
#10 1.160 hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
#10 1.160 hint: 'development'. The just-created branch can be renamed via this command:
#10 1.160 hint:
#10 1.160 hint:     git branch -m <name>
#10 1.172 Updating origin
 
#10 1.808 From https://github.com/rbenv/rbenv
#10 1.808  * [new branch]      master     -> origin/master
#10 1.836  * [new tag]         v0.1.0     -> v0.1.0
#10 1.836  * [new tag]         v0.1.1     -> v0.1.1
#10 1.836  * [new tag]         v0.1.2     -> v0.1.2
#10 1.836  * [new tag]         v0.2.0     -> v0.2.0
#10 1.836  * [new tag]         v0.2.1     -> v0.2.1
#10 1.836  * [new tag]         v0.3.0     -> v0.3.0
#10 1.836  * [new tag]         v0.4.0     -> v0.4.0
#10 1.836  * [new tag]         v1.0.0     -> v1.0.0
#10 1.836  * [new tag]         v1.1.0     -> v1.1.0
 
#10 1.836  * [new tag]         v1.1.1     -> v1.1.1
#10 1.836  * [new tag]         v1.1.2     -> v1.1.2
#10 1.836  * [new tag]         v1.2.0     -> v1.2.0
#10 1.861 Already on 'master'
#10 1.861 Branch 'master' set up to track remote branch 'master' from 'origin'.
 
#10 1.884
#10 1.884 Installing ruby-build with git...
#10 1.900 Cloning into '/root/.rbenv/plugins/ruby-build'...
 
#10 2.960
#10 2.960 All done!
#10 2.962 Note that this installer does NOT edit your shell configuration files:
#10 2.962 1. Run `~/.rbenv/bin/rbenv init' to view instructions on how to configure rbenv for your shell.
#10 2.962 2. Launch a new terminal window after editing shell configuration files.
#10 2.962
 
#10 3.210 To follow progress, use 'tail -f /tmp/ruby-build.20230721073358.132.log' or pass --verbose
 
#10 3.244 Downloading ruby-3.2.2.tar.gz...
#10 3.244 -> https://cache.ruby-lang.org/pub/ruby/3.2/ruby-3.2.2.tar.gz
 
#10 5.642 Installing ruby-3.2.2...
 
#10 340.3 Installed ruby-3.2.2 to /root/.rbenv/versions/3.2.2
#10 340.3
 
#10 341.3
#10 341.3 NOTE: to activate this Ruby version as the new default, run: rbenv global 3.2.2

It's not clear to me if YJIT is enabled after the ENV variable was set OK I can test something i believe RubyVM::YJIT.enabled?

Matts-Workhorse:zen-api wilko$ railway shell
No service linked, skipping service variables              
Entering subshell with Railway variables available. Type 'exit' to exit.
bash-3.2$ irb
3.2.2 :001 > RubyVM::YJIT.enabled?
 => false 
3.2.2 :002 >

Matts-Workhorse:zen-api wilko$ railway shell
No service linked, skipping service variables              
Entering subshell with Railway variables available. Type 'exit' to exit.
bash-3.2$ irb
3.2.2 :001 > RubyVM::YJIT.enabled?
 => false 
3.2.2 :002 >

seems to not be enabled OK! I've fixed it !

Entering subshell with Railway variables available. Type 'exit' to exit.
bash-3.2$ RUBY_YJIT_ENABLE=1 irb
3.2.2 :001 > RubyVM::YJIT.enabled?
 => true

Entering subshell with Railway variables available. Type 'exit' to exit.
bash-3.2$ RUBY_YJIT_ENABLE=1 irb
3.2.2 :001 > RubyVM::YJIT.enabled?
 => true

I think the way to do this is configure the NIXPACKS_START_CMD with something like

RUBY_YJIT_ENABLE=1 rails s -e production

RUBY_YJIT_ENABLE=1 rails s -e production

yep, confirmed:

2023-07-21T08:35:53.164Z pid=1 tid=4ah INFO: Running in ruby 3.2.2 (2023-03-30 revision e51014f9c0) +YJIT [x86_64-linux]

2023-07-21T08:35:53.164Z pid=1 tid=4ah INFO: Running in ruby 3.2.2 (2023-03-30 revision e51014f9c0) +YJIT [x86_64-linux]

Brody•16mo ago

railway shell is a local shell on your computer, it is not a shell within your deployment

macwilko•16mo ago

Thanks Brody

Brody•16mo ago

did you set this as a service variable?

macwilko•16mo ago

There's one thing I'm gonna do Rails.logger.info RUBY_DESCRIPTION that will print out something to the effect of ruby 3.2.2 (2023-03-30 revision e51014f9c0) [arm64-darwin22 one sec I know YJIT is working fine on the workers but honestly don't know if it applied to the Web process

Brody•16mo ago

sounds good for context I have zero knowledge of ruby

macwilko•16mo ago

me too! ruby 3.2.2 (2023-03-30 revision e51014f9c0) +YJIT [x86_64-linux] working good logged from the web process

Brody•16mo ago

success?

macwilko•16mo ago

yeah!

Brody•16mo ago

awesome!!

macwilko•16mo ago

ty!

Brody•16mo ago

no problem!!

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YJIT Ruby 3.2