Organisations ocaml-multicore multicore-bench efb15d (main)debian-13-5.4_ppc64_opam-2.5
debian-13-5.4_ppc64_opam-2.5

Created at Feb 15 17:59 +00:00
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Finished at Feb 15 18:13 +00:00
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2026-02-15 17:59.35: New job: test ocaml-multicore/multicore-bench https://github.com/ocaml-multicore/multicore-bench.git#refs/heads/main (efb15d8562dbdc1ba976ffc574de028e3c11c123) (linux-ppc64:debian-13-5.4_ppc64_opam-2.5)
Base: ocaml/opam:debian-13-ocaml-5.4@sha256:9e5cb5e8cb4265aea4d65da8515b5059a3c47c9865449a2924153a1ae9dbfad6
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@sha256:9e5cb5e8cb4265aea4d65da8515b5059a3c47c9865449a2924153a1ae9dbfad6
# debian-13-5.4_ppc64_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-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-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 17:59.35: Using cache hint "ocaml-multicore/multicore-bench-ocaml/opam:debian-13-ocaml-5.4@sha256:9e5cb5e8cb4265aea4d65da8515b5059a3c47c9865449a2924153a1ae9dbfad6-debian-13-5.4_ppc64_opam-2.5-ca9771ecc62fd6bbba007243926da734"
2026-02-15 17:59.35: Using OBuilder spec:
((from ocaml/opam:debian-13-ocaml-5.4@sha256:9e5cb5e8cb4265aea4d65da8515b5059a3c47c9865449a2924153a1ae9dbfad6)
(comment debian-13-5.4_ppc64_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-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-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 17:59.35: Waiting for resource in pool OCluster
2026-02-15 18:00.15: Waiting for worker…
2026-02-15 18:11.37: Got resource from pool OCluster
Building on scyleia.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@sha256:9e5cb5e8cb4265aea4d65da8515b5059a3c47c9865449a2924153a1ae9dbfad6)
2026-02-15 18:11.37 ---> using "38fabeb53b0af89c2369ea86094cc7d2b3dc20d7e4b2ada9c0be1b989bf9c870" from cache


/: (comment debian-13-5.4_ppc64_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"))
2026-02-15 18:11.37 ---> using "ab91914199d586edab34897f6499a5af18cbd8694cb62245e04b9875bce8ecc4" 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 18:11.37 ---> using "98a2c9b9b635287d3aa6cdc15287538630f05d6a0b597f7c5ac59178e0152967" from cache


/src: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version"))
Linux 6.8.0-85-generic
The OCaml toplevel, version 5.4.0
2.5.0
2026-02-15 18:11.37 ---> using "0236d984e65c9e8218cf8507c57591b73f8e37463306e0d6e2f4c6cfe05da7cb" from cache


/src: (workdir /src)


/src: (run (shell "sudo chown opam /src"))
2026-02-15 18:11.37 ---> using "3136e4f25384ffcbd2ceb1dd04c17fac559e38ceda0eecad38b6ab6f8ff722fb" 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 18:11.37 ---> using "7a8a9608c8413f39f919a9041a6d8f2aeda6be59aec03a1f364ea2601599ce3f" from cache


/src: (copy (src multicore-bench.opam) (dst ./))
2026-02-15 18:11.37 ---> saved as "3a6e02935551a7959b1c7981594d3a4b0c104e38aa081ba82be1fc503b0c0670"


/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 18:11.41 ---> saved as "f40e79a1b7bb4e44d93ac872aa9728731aefd652c2645103ac1c40c398ab9708"


/src: (run (network host)
(shell "echo '(lang dune 3.0)' > './dune-project'"))
2026-02-15 18:11.41 ---> saved as "c56ef760acecc7dbb68cce8f83e7c4e12fc3178d705e4319ecd9894339a0a4b1"


/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-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 ppc64el Packages [102 kB]
- Fetched 192 kB in 0s (1030 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-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 18:11.59 ---> saved as "58a45b4a5cfcc01e546beacbbf21fccc020f1b97b25e6fcaa0a8a66c56f2fbd7"


/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 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 csexp.1.5.2  (cached)
-> retrieved cppo.1.8.0  (cached)
-> retrieved cmdliner.2.1.0  (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 ocamlfind.1.9.8  (cached)
-> retrieved ocamlbuild.0.16.1  (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 csexp.1.5.2
-> installed thread-table.1.0.0
-> installed ocaml-version.4.0.3
-> installed backoff.0.1.1
-> installed multicore-magic.2.3.2
-> installed result.1.5
-> installed camlp-streams.5.0.1
-> 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)
2026-02-15 18:13.13 ---> saved as "c3a0793cc079c4051cb84cdec221567a1a9a1f1aaa201a5bf099470e1ed867f5"


/src: (copy (src .) (dst /src))
2026-02-15 18:13.13 ---> saved as "ab325af5b5c226e6284e2a7023ad0a7de153a9ab796e9b500462878d64c32cbe"


/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:
14.04 M/s
ops over time/get:
37.87 M/s
ops over time/incr:
8.27 M/s
ops over time/push & pop:
6.51 M/s
ops over time/swap:
6.75 M/s
ops over time/xchg int:
11.57 M/s
time per op/cas int:
71.24 ns
time per op/get:
26.41 ns
time per op/incr:
120.97 ns
time per op/push & pop:
153.51 ns
time per op/swap:
148.15 ns
time per op/xchg int:
86.45 ns
Atomic incr:
ops over time/CAS, 1 domains:
9.03 M/s
ops over time/CAS, 2 domains:
4.72 M/s
ops over time/CAS, 4 domains:
5.95 M/s
ops over time/CAS, 8 domains:
3.24 M/s
ops over time/CAS with backoff, 1 domains:
7.81 M/s
ops over time/CAS with backoff, 2 domains:
6.61 M/s
ops over time/CAS with backoff, 4 domains:
4.24 M/s
ops over time/CAS with backoff, 8 domains:
4.51 M/s
ops over time/Incr, 1 domains:
13.50 M/s
ops over time/Incr, 2 domains:
11.45 M/s
ops over time/Incr, 4 domains:
18.50 M/s
ops over time/Incr, 8 domains:
12.34 M/s
time per op/CAS, 1 domains:
110.76 ns
time per op/CAS, 2 domains:
423.45 ns
time per op/CAS, 4 domains:
672.04 ns
time per op/CAS, 8 domains:
2465.42 ns
time per op/CAS with backoff, 1 domains:
128.04 ns
time per op/CAS with backoff, 2 domains:
302.49 ns
time per op/CAS with backoff, 4 domains:
942.77 ns
time per op/CAS with backoff, 8 domains:
1775.01 ns
time per op/Incr, 1 domains:
74.05 ns
time per op/Incr, 2 domains:
174.75 ns
time per op/Incr, 4 domains:
216.19 ns
time per op/Incr, 8 domains:
648.06 ns
Bounded_q:
messages over time/1 adder, 1 taker:
0.88 M/s
messages over time/1 adder, 2 takers:
0.89 M/s
messages over time/1 adder, 4 takers:
0.52 M/s
messages over time/2 adders, 1 taker:
0.96 M/s
messages over time/2 adders, 2 takers:
0.54 M/s
messages over time/2 adders, 4 takers:
0.44 M/s
messages over time/4 adders, 1 taker:
1.10 M/s
messages over time/4 adders, 2 takers:
0.50 M/s
messages over time/4 adders, 4 takers:
0.54 M/s
messages over time/one domain:
1.59 M/s
time per message/1 adder, 1 taker:
2271.89 ns
time per message/1 adder, 2 takers:
3361.83 ns
time per message/1 adder, 4 takers:
9633.11 ns
time per message/2 adders, 1 taker:
3132.45 ns
time per message/2 adders, 2 takers:
7386.70 ns
time per message/2 adders, 4 takers:
13777.97 ns
time per message/4 adders, 1 taker:
4525.73 ns
time per message/4 adders, 2 takers:
11903.31 ns
time per message/4 adders, 4 takers:
14866.51 ns
time per message/one domain:
628.55 ns
Hashtbl:
operations over time/1 worker, 10% reads:
4.48 M/s
operations over time/1 worker, 50% reads:
3.40 M/s
operations over time/1 worker, 90% reads:
3.90 M/s
operations over time/2 workers, 10% reads:
1.00 M/s
operations over time/2 workers, 50% reads:
1.24 M/s
operations over time/2 workers, 90% reads:
1.98 M/s
operations over time/4 workers, 10% reads:
0.81 M/s
operations over time/4 workers, 50% reads:
1.12 M/s
operations over time/4 workers, 90% reads:
1.80 M/s
operations over time/8 workers, 10% reads:
0.66 M/s
operations over time/8 workers, 50% reads:
0.88 M/s
operations over time/8 workers, 90% reads:
0.90 M/s
operations over time/one domain, 10% reads:
8.40 M/s
operations over time/one domain, 50% reads:
10.42 M/s
operations over time/one domain, 90% reads:
8.97 M/s
time per operation/1 worker, 10% reads:
223.34 ns
time per operation/1 worker, 50% reads:
294.24 ns
time per operation/1 worker, 90% reads:
256.52 ns
time per operation/2 workers, 10% reads:
1996.92 ns
time per operation/2 workers, 50% reads:
1611.71 ns
time per operation/2 workers, 90% reads:
1011.47 ns
time per operation/4 workers, 10% reads:
4967.45 ns
time per operation/4 workers, 50% reads:
3582.07 ns
time per operation/4 workers, 90% reads:
2226.30 ns
time per operation/8 workers, 10% reads:
12091.09 ns
time per operation/8 workers, 50% reads:
9118.46 ns
time per operation/8 workers, 90% reads:
8906.44 ns
time per operation/one domain, 10% reads:
118.98 ns
time per operation/one domain, 50% reads:
95.97 ns
time per operation/one domain, 90% reads:
111.44 ns
Queue:
messages over time/one domain:
7.57 M/s
time per message/one domain:
132.07 ns
Ref with Mutex:
ops over time/cas int:
6.19 M/s
ops over time/get:
5.53 M/s
ops over time/incr:
6.42 M/s
ops over time/push & pop:
5.58 M/s
ops over time/swap:
5.44 M/s
ops over time/xchg int:
6.86 M/s
time per op/cas int:
161.56 ns
time per op/get:
180.98 ns
time per op/incr:
155.83 ns
time per op/push & pop:
179.20 ns
time per op/swap:
183.70 ns
time per op/xchg int:
145.84 ns
Ref with [@poll error]:
ops over time/cas int:
51.06 M/s
ops over time/get:
1000.90 M/s
ops over time/incr:
80.77 M/s
ops over time/push & pop:
18.83 M/s
ops over time/swap:
18.91 M/s
ops over time/xchg int:
49.96 M/s
time per op/cas int:
19.59 ns
time per op/get:
1.00 ns
time per op/incr:
12.38 ns
time per op/push & pop:
53.10 ns
time per op/swap:
52.88 ns
time per op/xchg int:
20.02 ns
Stack:
messages over time/one domain:
8.16 M/s
time per message/one domain:
122.56 ns
Unix:
blocking reads over time/1 worker:
0.42 M/s
blocking reads over time/2 workers:
0.98 M/s
blocking reads over time/4 workers:
1.90 M/s
time per blocking read/1 worker:
2383.49 ns
time per blocking read/2 workers:
2038.75 ns
time per blocking read/4 workers:
2106.24 ns
2026-02-15 18:13.52 ---> saved as "2f1c70a075aeaf680cbdb08efd5b62034a6f27da54e37d3baefbdb8392d905ce"
Job succeeded
2026-02-15 18:13.53: Job succeeded