Organisations ocaml-multicore multicore-bench efb15d (main)debian-13-5.4_arm32_opam-2.5
debian-13-5.4_arm32_opam-2.5

Created at Feb 15 18:00 +00:00
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Finished at Feb 15 18:14 +00:00
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2026-02-15 18:00.21: New job: test ocaml-multicore/multicore-bench https://github.com/ocaml-multicore/multicore-bench.git#refs/heads/main (efb15d8562dbdc1ba976ffc574de028e3c11c123) (linux-arm64:debian-13-5.4_arm32_opam-2.5)
Base: ocaml/opam:debian-13-ocaml-5.4@sha256:628d83c867e791f319d5ec6bd52c7ce2bd581e34e823ea51810a8afa91590ba4
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:debian-13-ocaml-5.4@sha256:628d83c867e791f319d5ec6bd52c7ce2bd581e34e823ea51810a8afa91590ba4
# debian-13-5.4_arm32_opam-2.5
USER 1000:1000
SHELL [ "/usr/bin/linux32", "/bin/sh", "-c" ]
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-domains.base base-effects.base base-nnp.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.5.4.0 ocaml-base-compiler.5.4.0 ocaml-compiler.5.4.0 ocaml-config.3 ocaml-option-bytecode-only.1 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


2026-02-15 18:00.21: Using cache hint "ocaml-multicore/multicore-bench-ocaml/opam:debian-13-ocaml-5.4@sha256:628d83c867e791f319d5ec6bd52c7ce2bd581e34e823ea51810a8afa91590ba4-debian-13-5.4_arm32_opam-2.5-22f66da174876fb9888d07b70e4a2f9c"
2026-02-15 18:00.21: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-5.4@sha256:628d83c867e791f319d5ec6bd52c7ce2bd581e34e823ea51810a8afa91590ba4)
(comment debian-13-5.4_arm32_opam-2.5)
(user (uid 1000) (gid 1000))
(shell /usr/bin/linux32 /bin/sh -c)
(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-domains.base base-effects.base base-nnp.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.5.4.0 ocaml-base-compiler.5.4.0 ocaml-compiler.5.4.0 ocaml-config.3 ocaml-option-bytecode-only.1 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"))
)


2026-02-15 18:00.21: Waiting for resource in pool OCluster
2026-02-15 18:00.29: Waiting for worker…
2026-02-15 18:13.05: Got resource from pool OCluster
Building on kydoime.caelum.ci.dev
All commits already cached
HEAD is now at efb15d8 Inline `Atomic` and `Ref` ops and unroll


(from ocaml/opam:debian-13-ocaml-5.4@sha256:628d83c867e791f319d5ec6bd52c7ce2bd581e34e823ea51810a8afa91590ba4)
2026-02-15 18:13.05 ---> using "886b69aed9ea9c1ba3ffd96ef12e36c903582bcf74205ba852be92083f58b0ad" from cache


/: (comment debian-13-5.4_arm32_opam-2.5)


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


/: (shell /usr/bin/linux32 /bin/sh -c)


/: (env CLICOLOR_FORCE 1)


/: (env OPAMCOLOR always)


/: (workdir /src)


/src: (run (shell "sudo ln -f /usr/bin/opam-2.5 /usr/bin/opam"))
2026-02-15 18:13.05 ---> using "83f29bfccc228ad6d12f724482452459c0e86729f547d29c04465242af4c9e07" 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
Format upgrade done.


<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2026-02-15 18:13.05 ---> using "c993b8c06262d2c774e8699f7db7d92633af261f82913bf1c18cdcb060746ec6" from cache


/src: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version"))
Linux 6.8.0-90-generic
The OCaml toplevel, version 5.4.0
2.5.0
2026-02-15 18:13.05 ---> using "123469a02544494a197ebe959c84b4c5338e578efd3129f5ef66c2d5f414e506" from cache


/src: (workdir /src)


/src: (run (shell "sudo chown opam /src"))
2026-02-15 18:13.05 ---> using "6c1f483e07e1d1752e80165f3ffb8389c79639c43e0ebd1b2469d24c98f52477" 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
340ee6fd1f..66fe1c299d  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


Already up-to-date.
Nothing to do.
# To update the current shell environment, run: eval $(opam env)
2026-02-15 18:13.05 ---> using "6305282bad76d27d2d6c3af2ee43b2a96550ae29b0bea9f0e064ccd58982c321" from cache


/src: (copy (src multicore-bench.opam) (dst ./))
2026-02-15 18:13.05 ---> saved as "ed0ec1cccc6b35ac43f77b781d9f43a2574361b3079fb52e7d3238711cbfd47b"


/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)
2026-02-15 18:13.07 ---> saved as "1d8d9dfe0b4173f1718aaf5aea4fc7b529cb2b706beb370b242b9cd1461f662e"


/src: (run (network host)
(shell "echo '(lang dune 3.0)' > './dune-project'"))
2026-02-15 18:13.07 ---> saved as "d64518442265302c468f3b10a031d395f25591cc74e2852aae465251526c5817"


/src: (env DEPS "astring.0.8.5 backoff.0.1.1 base-bigarray.base base-domains.base base-effects.base base-nnp.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.5.4.0 ocaml-base-compiler.5.4.0 ocaml-compiler.5.4.0 ocaml-config.3 ocaml-option-bytecode-only.1 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"
- Hit:1 http://deb.debian.org/debian trixie InRelease
- Get:2 http://deb.debian.org/debian trixie-updates InRelease [47.3 kB]
- Get:3 http://deb.debian.org/debian-security trixie-security InRelease [43.4 kB]
- Get:4 http://deb.debian.org/debian-security trixie-security/main armhf Packages [102 kB]
- Fetched 192 kB in 0s (806 kB/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-option-bytecode-only is already installed (current version is 1).
[NOTE] Package ocaml-config is already installed (current version is 3).
[NOTE] Package ocaml-compiler is already installed (current version is 5.4.0).
[NOTE] Package ocaml-base-compiler is already installed (current version is 5.4.0).
[NOTE] Package ocaml is already installed (current version is 5.4.0).
[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-nnp is already installed (current version is base).
[NOTE] Package base-effects is already installed (current version is base).
[NOTE] Package base-domains 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)
2026-02-15 18:13.18 ---> saved as "0ceb007e507e0b04dfc0eaa6d5efe621a214b15b9fdc95416ff21fbd5214d3af"


/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-option-bytecode-only is already installed (current version is 1).
[NOTE] Package ocaml-config is already installed (current version is 3).
[NOTE] Package ocaml-compiler is already installed (current version is 5.4.0).
[NOTE] Package ocaml-base-compiler is already installed (current version is 5.4.0).
[NOTE] Package ocaml is already installed (current version is 5.4.0).
[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-nnp is already installed (current version is base).
[NOTE] Package base-effects is already installed (current version is base).
[NOTE] Package base-domains 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 cmdliner.2.1.0  (cached)
-> retrieved csexp.1.5.2  (cached)
-> retrieved domain-local-await.1.0.1  (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 topkg.1.1.1  (cached)
-> retrieved yojson.3.0.0  (cached)
-> retrieved dune.3.21.1  (cached)
-> installed cmdliner.2.1.0
-> installed ocamlbuild.0.16.1
-> installed ocamlfind.1.9.8
-> 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 backoff.0.1.1
-> installed result.1.5
-> installed thread-table.1.0.0
-> installed camlp-streams.5.0.1
-> installed csexp.1.5.2
-> installed ocaml-version.4.0.3
-> installed multicore-magic.2.3.2
-> installed domain-local-await.1.0.1
-> installed re.1.14.0
-> installed yojson.3.0.0
-> installed cppo.1.8.0
-> installed mdx.2.5.1
Done.
# To update the current shell environment, run: eval $(opam env)
2026-02-15 18:14.31 ---> saved as "96f58e705ad6e6e60a943e801856283cc65f62d6f68b1efc217eb21ee334b83b"


/src: (copy (src .) (dst /src))
2026-02-15 18:14.31 ---> saved as "6ae0ee2731a5133170cff611e766607f16d592ca9a9de9ded89dc61315b489ac"


/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:
27.17 M/s
ops over time/get:
36.41 M/s
ops over time/incr:
19.54 M/s
ops over time/push & pop:
9.09 M/s
ops over time/swap:
8.86 M/s
ops over time/xchg int:
26.98 M/s
time per op/cas int:
36.81 ns
time per op/get:
27.47 ns
time per op/incr:
51.17 ns
time per op/push & pop:
109.98 ns
time per op/swap:
112.92 ns
time per op/xchg int:
37.06 ns
Atomic incr:
ops over time/CAS, 1 domains:
13.00 M/s
ops over time/CAS, 2 domains:
6.40 M/s
ops over time/CAS, 4 domains:
5.74 M/s
ops over time/CAS, 8 domains:
7.21 M/s
ops over time/CAS with backoff, 1 domains:
13.65 M/s
ops over time/CAS with backoff, 2 domains:
11.35 M/s
ops over time/CAS with backoff, 4 domains:
9.63 M/s
ops over time/CAS with backoff, 8 domains:
11.57 M/s
ops over time/Incr, 1 domains:
17.19 M/s
ops over time/Incr, 2 domains:
11.01 M/s
ops over time/Incr, 4 domains:
7.77 M/s
ops over time/Incr, 8 domains:
4.91 M/s
time per op/CAS, 1 domains:
76.95 ns
time per op/CAS, 2 domains:
312.34 ns
time per op/CAS, 4 domains:
696.49 ns
time per op/CAS, 8 domains:
1109.19 ns
time per op/CAS with backoff, 1 domains:
73.27 ns
time per op/CAS with backoff, 2 domains:
176.26 ns
time per op/CAS with backoff, 4 domains:
415.24 ns
time per op/CAS with backoff, 8 domains:
691.27 ns
time per op/Incr, 1 domains:
58.19 ns
time per op/Incr, 2 domains:
181.59 ns
time per op/Incr, 4 domains:
515.09 ns
time per op/Incr, 8 domains:
1630.93 ns
Bounded_q:
messages over time/1 adder, 1 taker:
0.77 M/s
messages over time/1 adder, 2 takers:
0.79 M/s
messages over time/1 adder, 4 takers:
0.63 M/s
messages over time/2 adders, 1 taker:
1.09 M/s
messages over time/2 adders, 2 takers:
0.76 M/s
messages over time/2 adders, 4 takers:
0.46 M/s
messages over time/4 adders, 1 taker:
1.13 M/s
messages over time/4 adders, 2 takers:
0.80 M/s
messages over time/4 adders, 4 takers:
0.56 M/s
messages over time/one domain:
2.16 M/s
time per message/1 adder, 1 taker:
2597.94 ns
time per message/1 adder, 2 takers:
3807.47 ns
time per message/1 adder, 4 takers:
7896.55 ns
time per message/2 adders, 1 taker:
2762.10 ns
time per message/2 adders, 2 takers:
5267.01 ns
time per message/2 adders, 4 takers:
13116.91 ns
time per message/4 adders, 1 taker:
4439.56 ns
time per message/4 adders, 2 takers:
7536.47 ns
time per message/4 adders, 4 takers:
14399.16 ns
time per message/one domain:
463.40 ns
Hashtbl:
operations over time/1 worker, 10% reads:
3.15 M/s
operations over time/1 worker, 50% reads:
3.33 M/s
operations over time/1 worker, 90% reads:
3.74 M/s
operations over time/2 workers, 10% reads:
1.62 M/s
operations over time/2 workers, 50% reads:
1.81 M/s
operations over time/2 workers, 90% reads:
2.02 M/s
operations over time/4 workers, 10% reads:
1.40 M/s
operations over time/4 workers, 50% reads:
1.57 M/s
operations over time/4 workers, 90% reads:
1.72 M/s
operations over time/8 workers, 10% reads:
1.29 M/s
operations over time/8 workers, 50% reads:
1.23 M/s
operations over time/8 workers, 90% reads:
1.35 M/s
operations over time/one domain, 10% reads:
3.83 M/s
operations over time/one domain, 50% reads:
4.05 M/s
operations over time/one domain, 90% reads:
4.55 M/s
time per operation/1 worker, 10% reads:
317.38 ns
time per operation/1 worker, 50% reads:
300.32 ns
time per operation/1 worker, 90% reads:
267.14 ns
time per operation/2 workers, 10% reads:
1234.70 ns
time per operation/2 workers, 50% reads:
1107.21 ns
time per operation/2 workers, 90% reads:
989.10 ns
time per operation/4 workers, 10% reads:
2849.13 ns
time per operation/4 workers, 50% reads:
2540.66 ns
time per operation/4 workers, 90% reads:
2331.85 ns
time per operation/8 workers, 10% reads:
6200.13 ns
time per operation/8 workers, 50% reads:
6517.36 ns
time per operation/8 workers, 90% reads:
5922.03 ns
time per operation/one domain, 10% reads:
260.89 ns
time per operation/one domain, 50% reads:
246.64 ns
time per operation/one domain, 90% reads:
219.63 ns
Queue:
messages over time/one domain:
4.70 M/s
time per message/one domain:
212.68 ns
Ref with Mutex:
ops over time/cas int:
10.16 M/s
ops over time/get:
15.30 M/s
ops over time/incr:
13.44 M/s
ops over time/push & pop:
12.33 M/s
ops over time/swap:
11.62 M/s
ops over time/xchg int:
11.14 M/s
time per op/cas int:
98.45 ns
time per op/get:
65.34 ns
time per op/incr:
74.38 ns
time per op/push & pop:
81.13 ns
time per op/swap:
86.06 ns
time per op/xchg int:
89.79 ns
Ref with [@poll error]:
ops over time/cas int:
23.00 M/s
ops over time/get:
55.03 M/s
ops over time/incr:
39.74 M/s
ops over time/push & pop:
9.13 M/s
ops over time/swap:
9.37 M/s
ops over time/xchg int:
28.89 M/s
time per op/cas int:
43.48 ns
time per op/get:
18.17 ns
time per op/incr:
25.16 ns
time per op/push & pop:
109.51 ns
time per op/swap:
106.70 ns
time per op/xchg int:
34.61 ns
Stack:
messages over time/one domain:
5.66 M/s
time per message/one domain:
176.56 ns
Unix:
blocking reads over time/1 worker:
1.92 M/s
blocking reads over time/2 workers:
3.88 M/s
blocking reads over time/4 workers:
7.66 M/s
time per blocking read/1 worker:
520.77 ns
time per blocking read/2 workers:
515.31 ns
time per blocking read/4 workers:
522.15 ns
2026-02-15 18:14.39 ---> saved as "67994c0174ff543c7295f358bb3485214789d3d804a3f52a01ce311da38c6681"
Job succeeded
2026-02-15 18:14.39: Job succeeded