ubuntu-24.04-4.14_opam-2.5

2026-02-13 08:07.01: New job: test ocaml-multicore/multicore-bench https://github.com/ocaml-multicore/multicore-bench.git#refs/heads/main (efb15d8562dbdc1ba976ffc574de028e3c11c123) (linux-x86_64:ubuntu-24.04-4.14_opam-2.5)
Base: ocaml/opam:ubuntu-24.04-ocaml-4.14@sha256:458f06d1dec2c657e98484451140d4129abb934ad590479ec7b4b4a7bc60b6b8
Opam project build


To reproduce locally:


git clone --recursive "https://github.com/ocaml-multicore/multicore-bench.git" -b "main" && cd "multicore-bench" && git reset --hard efb15d85
cat > Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:ubuntu-24.04-ocaml-4.14@sha256:458f06d1dec2c657e98484451140d4129abb934ad590479ec7b4b4a7bc60b6b8
# ubuntu-24.04-4.14_opam-2.5
USER 1000:1000
ENV CLICOLOR_FORCE="1"
ENV OPAMCOLOR="always"
WORKDIR /src
RUN sudo ln -f /usr/bin/opam-2.5 /usr/bin/opam
RUN opam init --reinit -ni
RUN uname -rs && opam exec -- ocaml -version && opam --version
WORKDIR /src
RUN sudo chown opam /src
RUN cd ~/opam-repository && (git cat-file -e 302e116c4009da2f5a31c350a57c8b3c9b27289e || git fetch origin master) && git reset -q --hard 302e116c4009da2f5a31c350a57c8b3c9b27289e && git log --no-decorate -n1 --oneline && opam update -u
COPY --chown=1000:1000 multicore-bench.opam ./
RUN opam pin add -yn multicore-bench.dev './'
RUN echo '(lang dune 3.0)' > './dune-project'
ENV DEPS="astring.0.8.5 backoff.0.1.1 base-bigarray.base base-threads.base base-unix.base camlp-streams.5.0.1 cmdliner.2.1.0 cppo.1.8.0 csexp.1.5.2 domain-local-await.1.0.1 domain_shims.0.1.0 dune.3.21.1 fmt.0.11.0 logs.0.10.0 mdx.2.5.1 mtime.2.1.0 multicore-magic.2.3.2 ocaml.4.14.2 ocaml-base-compiler.4.14.2 ocaml-config.2 ocaml-options-vanilla.1 ocaml-version.4.0.3 ocamlbuild.0.16.1 ocamlfind.1.9.8 re.1.14.0 result.1.5 thread-table.1.0.0 topkg.1.1.1 yojson.3.0.0"
ENV CI="true"
ENV OCAMLCI="true"
RUN opam update --depexts && opam install --cli=2.5 --depext-only -y multicore-bench.dev $DEPS
RUN opam install $DEPS
COPY --chown=1000:1000 . /src
RUN opam exec -- dune build @install @check @runtest && rm -rf _build


END-OF-DOCKERFILE
docker build .
END-REPRO-BLOCK


2026-02-13 08:07.01: Using cache hint "ocaml-multicore/multicore-bench-ocaml/opam:ubuntu-24.04-ocaml-4.14@sha256:458f06d1dec2c657e98484451140d4129abb934ad590479ec7b4b4a7bc60b6b8-ubuntu-24.04-4.14_opam-2.5-3276ee940043c1e69634f204ac603fad"
2026-02-13 08:07.01: Using OBuilder spec:
((from ocaml/opam:ubuntu-24.04-ocaml-4.14@sha256:458f06d1dec2c657e98484451140d4129abb934ad590479ec7b4b4a7bc60b6b8)
(comment ubuntu-24.04-4.14_opam-2.5)
(user (uid 1000) (gid 1000))
(env CLICOLOR_FORCE 1)
(env OPAMCOLOR always)
(workdir /src)
(run (shell "sudo ln -f /usr/bin/opam-2.5 /usr/bin/opam"))
(run (shell "opam init --reinit -ni"))
(run (shell "uname -rs && opam exec -- ocaml -version && opam --version"))
(workdir /src)
(run (shell "sudo chown opam /src"))
(run (cache (opam-archives (target /home/opam/.opam/download-cache)))
(network host)
(shell "cd ~/opam-repository && (git cat-file -e 302e116c4009da2f5a31c350a57c8b3c9b27289e || git fetch origin master) && git reset -q --hard 302e116c4009da2f5a31c350a57c8b3c9b27289e && git log --no-decorate -n1 --oneline && opam update -u"))
(copy (src multicore-bench.opam) (dst ./))
(run (network host)
(shell "opam pin add -yn multicore-bench.dev './'"))
(run (network host)
(shell "echo '(lang dune 3.0)' > './dune-project'"))
(env DEPS "astring.0.8.5 backoff.0.1.1 base-bigarray.base base-threads.base base-unix.base camlp-streams.5.0.1 cmdliner.2.1.0 cppo.1.8.0 csexp.1.5.2 domain-local-await.1.0.1 domain_shims.0.1.0 dune.3.21.1 fmt.0.11.0 logs.0.10.0 mdx.2.5.1 mtime.2.1.0 multicore-magic.2.3.2 ocaml.4.14.2 ocaml-base-compiler.4.14.2 ocaml-config.2 ocaml-options-vanilla.1 ocaml-version.4.0.3 ocamlbuild.0.16.1 ocamlfind.1.9.8 re.1.14.0 result.1.5 thread-table.1.0.0 topkg.1.1.1 yojson.3.0.0")
(env CI true)
(env OCAMLCI true)
(run (cache (opam-archives (target /home/opam/.opam/download-cache)))
(network host)
(shell "opam update --depexts && opam install --cli=2.5 --depext-only -y multicore-bench.dev $DEPS"))
(run (cache (opam-archives (target /home/opam/.opam/download-cache)))
(network host)
(shell "opam install $DEPS"))
(copy (src .) (dst /src))
(run (shell "opam exec -- dune build @install @check @runtest && rm -rf _build"))
)


2026-02-13 08:07.01: Waiting for resource in pool OCluster
2026-02-13 11:19.58: Waiting for worker…
2026-02-13 11:23.35: Got resource from pool OCluster
Building on eumache
All commits already cached
HEAD is now at efb15d8 Inline `Atomic` and `Ref` ops and unroll


(from ocaml/opam:ubuntu-24.04-ocaml-4.14@sha256:458f06d1dec2c657e98484451140d4129abb934ad590479ec7b4b4a7bc60b6b8)
Unable to find image 'ocaml/opam:ubuntu-24.04-ocaml-4.14@sha256:458f06d1dec2c657e98484451140d4129abb934ad590479ec7b4b4a7bc60b6b8' locally
docker.io/ocaml/opam@sha256:458f06d1dec2c657e98484451140d4129abb934ad590479ec7b4b4a7bc60b6b8: Pulling from ocaml/opam
a3629ac5b9f4: Already exists
1df74ae2bf3e: Already exists
2563f25c1178: Already exists
f5fc2898bd97: Already exists
07bec2374ef4: Already exists
182b6598c3cc: Already exists
8c2da7c8c95f: Already exists
20cf8da7cf35: Already exists
7610f2cf1786: Already exists
7399021ff14f: Already exists
9456e89e55d4: Already exists
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f036ba372f52: Already exists
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ed12334bba7e: Already exists
Digest: sha256:458f06d1dec2c657e98484451140d4129abb934ad590479ec7b4b4a7bc60b6b8
Status: Downloaded newer image for ocaml/opam@sha256:458f06d1dec2c657e98484451140d4129abb934ad590479ec7b4b4a7bc60b6b8
2026-02-13 11:23.35 ---> using "ef22c250542bfdbbae9cc5c0c5dceee33d5c6eaa63ef93c0e62d649e6d282495" from cache


/: (comment ubuntu-24.04-4.14_opam-2.5)


/: (user (uid 1000) (gid 1000))


/: (env CLICOLOR_FORCE 1)


/: (env OPAMCOLOR always)


/: (workdir /src)


/src: (run (shell "sudo ln -f /usr/bin/opam-2.5 /usr/bin/opam"))
2026-02-13 11:23.35 ---> using "94b306c568a54449b56cd89b8114cf21f76fb95cb9cfc62d690b44d2a92b39ef" from cache


/src: (run (shell "opam init --reinit -ni"))
Configuring from /home/opam/.opamrc and then from built-in defaults.
Checking for available remotes: rsync and local, git.
- you won't be able to use mercurial repositories unless you install the hg command on your system.
- you won't be able to use darcs repositories unless you install the darcs command on your system.


This version of opam requires an update to the layout of /home/opam/.opam from version 2.0 to version 2.2, which can't be reverted.
You may want to back it up before going further.


Continue? [Y/n] y
[NOTE] The 'jobs' option was reset, its value was 255 and its new value will vary according to the current number of cores on your machine. You can restore the fixed value using:
opam option jobs=255 --global
Format upgrade done.


<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2026-02-13 11:23.35 ---> using "088b1f75292e92f2b7147a2fa802470c80442d5e490e50c28b1c075db81389dc" from cache


/src: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version"))
Linux 5.15.0-131-generic
The OCaml toplevel, version 4.14.2
2.5.0
2026-02-13 11:23.35 ---> using "af2883df424175f72b177cf06b16a804446bf9b6937bbb12fa369d98450581a6" from cache


/src: (workdir /src)


/src: (run (shell "sudo chown opam /src"))
2026-02-13 11:23.35 ---> using "935ff14fa4d7e36e3a0cf92fc51faeea8b126c3b41508e6fa2843d0e16584ece" from cache


/src: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
(network host)
(shell "cd ~/opam-repository && (git cat-file -e 302e116c4009da2f5a31c350a57c8b3c9b27289e || git fetch origin master) && git reset -q --hard 302e116c4009da2f5a31c350a57c8b3c9b27289e && git log --no-decorate -n1 --oneline && opam update -u"))
From https://github.com/ocaml/opam-repository
* branch                  master     -> FETCH_HEAD
8e1b9a49e8..302e116c40  master     -> origin/master
302e116c40 Merge pull request #29374 from shonfeder/release-dune-3.21.1


<><> Updating package repositories ><><><><><><><><><><><><><><><><><><><><><><>
[default] synchronised from git+file:///home/opam/opam-repository


Everything as up-to-date as possible (run with --verbose to show unavailable upgrades).
However, you may "opam upgrade" these packages explicitly at these versions (e.g. "opam upgrade ocaml.5.4.0"), which will ask permission to downgrade or uninstall the conflicting packages.
Nothing to do.
# To update the current shell environment, run: eval $(opam env)
2026-02-13 11:23.35 ---> using "46a5ade504ae7a7211b18ce510a0d3eba138e260064ff3452441f188208dd454" from cache


/src: (copy (src multicore-bench.opam) (dst ./))
2026-02-13 11:23.36 ---> saved as "bb3c315d74aef44df754f138abdafaa1d1d3959b91b7ab9de99256d76e0e2910"


/src: (run (network host)
(shell "opam pin add -yn multicore-bench.dev './'"))
[multicore-bench.dev] synchronised (file:///src)
multicore-bench is now pinned to file:///src (version dev)
2026-02-13 11:23.39 ---> saved as "3bec762739debb64227fc8c42dc371ab3586bee80b20102c3b467570aa209373"


/src: (run (network host)
(shell "echo '(lang dune 3.0)' > './dune-project'"))
2026-02-13 11:23.40 ---> saved as "788267137f208b760c92dc67416f2f0dfffe9b09fdd7bab957ac8f9f21361c30"


/src: (env DEPS "astring.0.8.5 backoff.0.1.1 base-bigarray.base base-threads.base base-unix.base camlp-streams.5.0.1 cmdliner.2.1.0 cppo.1.8.0 csexp.1.5.2 domain-local-await.1.0.1 domain_shims.0.1.0 dune.3.21.1 fmt.0.11.0 logs.0.10.0 mdx.2.5.1 mtime.2.1.0 multicore-magic.2.3.2 ocaml.4.14.2 ocaml-base-compiler.4.14.2 ocaml-config.2 ocaml-options-vanilla.1 ocaml-version.4.0.3 ocamlbuild.0.16.1 ocamlfind.1.9.8 re.1.14.0 result.1.5 thread-table.1.0.0 topkg.1.1.1 yojson.3.0.0")


/src: (env CI true)


/src: (env OCAMLCI true)


/src: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
(network host)
(shell "opam update --depexts && opam install --cli=2.5 --depext-only -y multicore-bench.dev $DEPS"))
+ /usr/bin/sudo "apt-get" "update"
- Get:1 http://security.ubuntu.com/ubuntu noble-security InRelease [126 kB]
- Hit:2 http://archive.ubuntu.com/ubuntu noble InRelease
- Get:3 http://archive.ubuntu.com/ubuntu noble-updates InRelease [126 kB]
- Get:4 http://archive.ubuntu.com/ubuntu noble-backports InRelease [126 kB]
- Get:5 http://security.ubuntu.com/ubuntu noble-security/main amd64 Packages [1824 kB]
- Get:6 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 Packages [1979 kB]
- Get:7 http://security.ubuntu.com/ubuntu noble-security/multiverse amd64 Packages [34.8 kB]
- Get:8 http://security.ubuntu.com/ubuntu noble-security/universe amd64 Packages [1200 kB]
- Get:9 http://security.ubuntu.com/ubuntu noble-security/restricted amd64 Packages [3115 kB]
- Get:10 http://archive.ubuntu.com/ubuntu noble-updates/restricted amd64 Packages [3295 kB]
- Get:11 http://archive.ubuntu.com/ubuntu noble-updates/multiverse amd64 Packages [38.1 kB]
- Get:12 http://archive.ubuntu.com/ubuntu noble-updates/main amd64 Packages [2203 kB]
- Fetched 14.1 MB in 1s (12.6 MB/s)
- Reading package lists...
- 


<><> Synchronising pinned packages ><><><><><><><><><><><><><><><><><><><><><><>
[multicore-bench.dev] synchronised (file:///src)


[NOTE] Package ocaml-options-vanilla is already installed (current version is 1).
[NOTE] Package ocaml-config is already installed (current version is 2).
[NOTE] Package ocaml-base-compiler is already installed (current version is 4.14.2).
[NOTE] Package ocaml is already installed (current version is 4.14.2).
[NOTE] Package base-unix is already installed (current version is base).
[NOTE] Package base-threads is already installed (current version is base).
[NOTE] Package base-bigarray is already installed (current version is base).
# To update the current shell environment, run: eval $(opam env)
2026-02-13 11:23.58 ---> saved as "8b3b5f4c847290e60b45705a42eff6985877c0e090e500595d77e356757b3542"


/src: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
(network host)
(shell "opam install $DEPS"))
[NOTE] Package ocaml-options-vanilla is already installed (current version is 1).
[NOTE] Package ocaml-config is already installed (current version is 2).
[NOTE] Package ocaml-base-compiler is already installed (current version is 4.14.2).
[NOTE] Package ocaml is already installed (current version is 4.14.2).
[NOTE] Package base-unix is already installed (current version is base).
[NOTE] Package base-threads is already installed (current version is base).
[NOTE] Package base-bigarray is already installed (current version is base).
The following actions will be performed:
=== install 22 packages
- install astring            0.8.5
- install backoff            0.1.1
- install camlp-streams      5.0.1
- install cmdliner           2.1.0
- install cppo               1.8.0
- install csexp              1.5.2
- install domain-local-await 1.0.1
- install domain_shims       0.1.0
- install dune               3.21.1
- install fmt                0.11.0
- install logs               0.10.0
- install mdx                2.5.1
- install mtime              2.1.0
- install multicore-magic    2.3.2
- install ocaml-version      4.0.3
- install ocamlbuild         0.16.1
- install ocamlfind          1.9.8
- install re                 1.14.0
- install result             1.5
- install thread-table       1.0.0
- install topkg              1.1.1
- install yojson             3.0.0


<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved astring.0.8.5  (cached)
-> retrieved backoff.0.1.1  (cached)
-> retrieved camlp-streams.5.0.1  (cached)
-> retrieved cppo.1.8.0  (cached)
-> retrieved csexp.1.5.2  (cached)
-> retrieved domain-local-await.1.0.1  (cached)
-> retrieved cmdliner.2.1.0  (cached)
-> retrieved domain_shims.0.1.0  (cached)
-> retrieved fmt.0.11.0  (cached)
-> retrieved logs.0.10.0  (cached)
-> retrieved mtime.2.1.0  (cached)
-> retrieved mdx.2.5.1  (cached)
-> retrieved multicore-magic.2.3.2  (cached)
-> retrieved ocaml-version.4.0.3  (cached)
-> retrieved ocamlbuild.0.16.1  (cached)
-> retrieved ocamlfind.1.9.8  (cached)
-> retrieved re.1.14.0  (cached)
-> retrieved result.1.5  (cached)
-> retrieved thread-table.1.0.0  (cached)
-> retrieved yojson.3.0.0  (cached)
-> retrieved topkg.1.1.1  (cached)
-> retrieved dune.3.21.1  (cached)
-> installed cmdliner.2.1.0
-> installed ocamlfind.1.9.8
-> installed ocamlbuild.0.16.1
-> installed topkg.1.1.1
-> installed mtime.2.1.0
-> installed fmt.0.11.0
-> installed astring.0.8.5
-> installed logs.0.10.0
-> installed dune.3.21.1
-> installed domain_shims.0.1.0
-> installed csexp.1.5.2
-> installed result.1.5
-> installed multicore-magic.2.3.2
-> installed camlp-streams.5.0.1
-> installed thread-table.1.0.0
-> installed ocaml-version.4.0.3
-> installed backoff.0.1.1
-> installed domain-local-await.1.0.1
-> installed cppo.1.8.0
-> installed re.1.14.0
-> installed yojson.3.0.0
-> installed mdx.2.5.1
Done.
# To update the current shell environment, run: eval $(opam env)
2026-02-13 11:25.49 ---> saved as "64119c05578f153b72d6d69592c330f2d10eb9de8cf6800f3483018a27bef716"


/src: (copy (src .) (dst /src))
2026-02-13 11:25.50 ---> saved as "00b0652521cffaf919912ecd636b03f062ba213b68644dd74ac56d957ee2882c"


/src: (run (shell "opam exec -- dune build @install @check @runtest && rm -rf _build"))
(cd _build/default/bench && ./main.exe -brief)
Atomic:
ops over time/cas int:
118.09 M/s
ops over time/get:
1325.32 M/s
ops over time/incr:
224.02 M/s
ops over time/push & pop:
35.47 M/s
ops over time/swap:
55.18 M/s
ops over time/xchg int:
101.63 M/s
time per op/cas int:
8.47 ns
time per op/get:
0.75 ns
time per op/incr:
4.46 ns
time per op/push & pop:
28.19 ns
time per op/swap:
18.12 ns
time per op/xchg int:
9.84 ns
Atomic incr:
ops over time/CAS, 1 domains:
97.39 M/s
ops over time/CAS with backoff, 1 domains:
102.50 M/s
ops over time/Incr, 1 domains:
183.48 M/s
time per op/CAS, 1 domains:
10.27 ns
time per op/CAS with backoff, 1 domains:
9.76 ns
time per op/Incr, 1 domains:
5.45 ns
Bounded_q:
messages over time/one domain:
4.09 M/s
time per message/one domain:
244.71 ns
Hashtbl:
operations over time/1 worker, 10% reads:
5.36 M/s
operations over time/1 worker, 50% reads:
5.00 M/s
operations over time/1 worker, 90% reads:
5.78 M/s
operations over time/2 workers, 10% reads:
5.10 M/s
operations over time/2 workers, 50% reads:
5.22 M/s
operations over time/2 workers, 90% reads:
6.59 M/s
operations over time/4 workers, 10% reads:
5.07 M/s
operations over time/4 workers, 50% reads:
5.08 M/s
operations over time/4 workers, 90% reads:
5.74 M/s
operations over time/8 workers, 10% reads:
4.81 M/s
operations over time/8 workers, 50% reads:
4.86 M/s
operations over time/8 workers, 90% reads:
5.20 M/s
operations over time/one domain, 10% reads:
9.64 M/s
operations over time/one domain, 50% reads:
9.82 M/s
operations over time/one domain, 90% reads:
10.69 M/s
time per operation/1 worker, 10% reads:
186.40 ns
time per operation/1 worker, 50% reads:
200.09 ns
time per operation/1 worker, 90% reads:
173.09 ns
time per operation/2 workers, 10% reads:
392.26 ns
time per operation/2 workers, 50% reads:
383.01 ns
time per operation/2 workers, 90% reads:
303.38 ns
time per operation/4 workers, 10% reads:
789.06 ns
time per operation/4 workers, 50% reads:
787.01 ns
time per operation/4 workers, 90% reads:
696.53 ns
time per operation/8 workers, 10% reads:
1663.82 ns
time per operation/8 workers, 50% reads:
1645.38 ns
time per operation/8 workers, 90% reads:
1539.82 ns
time per operation/one domain, 10% reads:
103.75 ns
time per operation/one domain, 50% reads:
101.84 ns
time per operation/one domain, 90% reads:
93.56 ns
Queue:
messages over time/one domain:
20.26 M/s
time per message/one domain:
49.36 ns
Ref with Mutex:
ops over time/cas int:
9.93 M/s
ops over time/get:
13.22 M/s
ops over time/incr:
13.39 M/s
ops over time/push & pop:
10.67 M/s
ops over time/swap:
9.32 M/s
ops over time/xchg int:
9.91 M/s
time per op/cas int:
100.66 ns
time per op/get:
75.65 ns
time per op/incr:
74.71 ns
time per op/push & pop:
93.68 ns
time per op/swap:
107.34 ns
time per op/xchg int:
100.93 ns
Ref with [@poll error]:
ops over time/cas int:
120.31 M/s
ops over time/get:
1223.07 M/s
ops over time/incr:
205.22 M/s
ops over time/push & pop:
34.02 M/s
ops over time/swap:
53.79 M/s
ops over time/xchg int:
144.35 M/s
time per op/cas int:
8.31 ns
time per op/get:
0.82 ns
time per op/incr:
4.87 ns
time per op/push & pop:
29.39 ns
time per op/swap:
18.59 ns
time per op/xchg int:
6.93 ns
Stack:
messages over time/one domain:
21.46 M/s
time per message/one domain:
46.59 ns
Unix:
blocking reads over time/1 worker:
0.20 M/s
time per blocking read/1 worker:
4949.83 ns
2026-02-13 11:25.59 ---> saved as "676fd65ab6bbabb9f0cef3bc9f95d58c8967096256b30e5294cf78da5b2cc979"
Job succeeded
2026-02-13 11:25.59: Job succeeded