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-x86_64:ubuntu-25.10-5.4_opam-2.5) Base: ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:b6da22869c1591ab428e9f2b65f7f7b251e688a3457468ec19462cece35bde38 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-25.10-ocaml-5.4@sha256:b6da22869c1591ab428e9f2b65f7f7b251e688a3457468ec19462cece35bde38 # ubuntu-25.10-5.4_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:ubuntu-25.10-ocaml-5.4@sha256:b6da22869c1591ab428e9f2b65f7f7b251e688a3457468ec19462cece35bde38-ubuntu-25.10-5.4_opam-2.5-ca9771ecc62fd6bbba007243926da734" 2026-02-15 17:59.35: Using OBuilder spec: ((from ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:b6da22869c1591ab428e9f2b65f7f7b251e688a3457468ec19462cece35bde38) (comment ubuntu-25.10-5.4_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 19:07.38: Waiting for worker… 2026-02-15 19:12.39: Got resource from pool OCluster Building on odawa.caelum.ci.dev All commits already cached HEAD is now at efb15d8 Inline `Atomic` and `Ref` ops and unroll (from ocaml/opam:ubuntu-25.10-ocaml-5.4@sha256:b6da22869c1591ab428e9f2b65f7f7b251e688a3457468ec19462cece35bde38) 2026-02-15 19:12.39 ---> using "1298e1d5dffa8ce226321a1bcac39114330568ccaf390856807160369fa2ee49" from cache /: (comment ubuntu-25.10-5.4_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 19:12.39 ---> using "1309b00d49741b88d8a73f19dac74cdc341f0ea644c75bd9b33ad15e1287e5a7" 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 19:12.39 ---> using "57dc3cdc729adb9e6c9e5bf071f8fbdb234f3d02dafd21de9bfb3d54f052a06a" from cache /src: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version")) Linux 6.8.0-87-generic The OCaml toplevel, version 5.4.0 2.5.0 2026-02-15 19:12.39 ---> using "3d0d866b98945a590649320861fdb4b7471117620aa39fb17f1722560eadacd1" from cache /src: (workdir /src) /src: (run (shell "sudo chown opam /src")) 2026-02-15 19:12.39 ---> using "d4aea8789e5fc4f003c8fb4303cca09a40290830fa06e0c70a235332b8bcc654" 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 19:12.39 ---> using "ca276d2e1ed6160a3a87347757c592e5748bfd5beb1d7cc24fbda823de805a89" from cache /src: (copy (src multicore-bench.opam) (dst ./)) 2026-02-15 19:12.39 ---> saved as "ff19b3bac74337ef5f6a4693da6b8d7db9db8aa4825ff0caac25b73e9e9ef9ac" /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 19:12.41 ---> saved as "7b4117d03400871e5ffba4763d0631f1ac3f5fe4794586b76eb10c4e1689152c" /src: (run (network host) (shell "echo '(lang dune 3.0)' > './dune-project'")) 2026-02-15 19:12.41 ---> saved as "6aca2704f476d4093a4fc537f74bf2dc877e18c5ed6123e185329be656b41bc4" /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://archive.ubuntu.com/ubuntu questing InRelease - Get:2 http://archive.ubuntu.com/ubuntu questing-updates InRelease [136 kB] - Get:3 http://security.ubuntu.com/ubuntu questing-security InRelease [136 kB] - Get:4 http://archive.ubuntu.com/ubuntu questing-backports InRelease [133 kB] - Get:5 http://security.ubuntu.com/ubuntu questing-security/main amd64 Packages [224 kB] - Get:6 http://archive.ubuntu.com/ubuntu questing-updates/main amd64 Packages [374 kB] - Get:7 http://security.ubuntu.com/ubuntu questing-security/universe amd64 Packages [138 kB] - Get:8 http://security.ubuntu.com/ubuntu questing-security/restricted amd64 Packages [186 kB] - Get:9 http://archive.ubuntu.com/ubuntu questing-updates/universe amd64 Packages [223 kB] - Get:10 http://archive.ubuntu.com/ubuntu questing-updates/restricted amd64 Packages [196 kB] - Fetched 1747 kB in 0s (12.8 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 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 19:12.48 ---> saved as "d5b023bd72d1d9f224dd43462f0717803478b3ceb1b83a1a10378439073c0642" /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 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 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 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 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 re.1.14.0 -> installed cppo.1.8.0 -> installed yojson.3.0.0 -> installed mdx.2.5.1 Done. # To update the current shell environment, run: eval $(opam env) 2026-02-15 19:13.17 ---> saved as "5f702ffa5027d0e5e8f6028758775d6c33a4f7e02d331b815c2f15e03bd7f22d" /src: (copy (src .) (dst /src)) 2026-02-15 19:13.18 ---> saved as "b6a33350561996c4e08f386950fdf4d90f3166c71f91b9f8c5a48a2315341e2e" /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: 344.21 M/s ops over time/get: 3559.03 M/s ops over time/incr: 295.19 M/s ops over time/push & pop: 72.79 M/s ops over time/swap: 96.05 M/s ops over time/xchg int: 330.15 M/s time per op/cas int: 2.91 ns time per op/get: 0.28 ns time per op/incr: 3.39 ns time per op/push & pop: 13.74 ns time per op/swap: 10.41 ns time per op/xchg int: 3.03 ns Atomic incr: ops over time/CAS, 1 domains: 157.23 M/s ops over time/CAS, 2 domains: 80.51 M/s ops over time/CAS, 4 domains: 73.92 M/s ops over time/CAS, 8 domains: 36.39 M/s ops over time/CAS with backoff, 1 domains: 279.05 M/s ops over time/CAS with backoff, 2 domains: 123.37 M/s ops over time/CAS with backoff, 4 domains: 66.03 M/s ops over time/CAS with backoff, 8 domains: 49.17 M/s ops over time/Incr, 1 domains: 248.43 M/s ops over time/Incr, 2 domains: 109.64 M/s ops over time/Incr, 4 domains: 84.40 M/s ops over time/Incr, 8 domains: 66.75 M/s time per op/CAS, 1 domains: 6.36 ns time per op/CAS, 2 domains: 24.84 ns time per op/CAS, 4 domains: 54.11 ns time per op/CAS, 8 domains: 219.85 ns time per op/CAS with backoff, 1 domains: 3.58 ns time per op/CAS with backoff, 2 domains: 16.21 ns time per op/CAS with backoff, 4 domains: 60.57 ns time per op/CAS with backoff, 8 domains: 162.70 ns time per op/Incr, 1 domains: 4.03 ns time per op/Incr, 2 domains: 18.24 ns time per op/Incr, 4 domains: 47.39 ns time per op/Incr, 8 domains: 119.85 ns Bounded_q: messages over time/1 adder, 1 taker: 2.78 M/s messages over time/1 adder, 2 takers: 3.67 M/s messages over time/1 adder, 4 takers: 6.45 M/s messages over time/2 adders, 1 taker: 3.43 M/s messages over time/2 adders, 2 takers: 2.44 M/s messages over time/2 adders, 4 takers: 2.35 M/s messages over time/4 adders, 1 taker: 3.21 M/s messages over time/4 adders, 2 takers: 1.75 M/s messages over time/4 adders, 4 takers: 1.26 M/s messages over time/one domain: 16.23 M/s time per message/1 adder, 1 taker: 720.60 ns time per message/1 adder, 2 takers: 817.92 ns time per message/1 adder, 4 takers: 775.24 ns time per message/2 adders, 1 taker: 873.73 ns time per message/2 adders, 2 takers: 1640.92 ns time per message/2 adders, 4 takers: 2557.71 ns time per message/4 adders, 1 taker: 1555.28 ns time per message/4 adders, 2 takers: 3436.69 ns time per message/4 adders, 4 takers: 6361.11 ns time per message/one domain: 61.60 ns Hashtbl: operations over time/1 worker, 10% reads: 20.98 M/s operations over time/1 worker, 50% reads: 20.10 M/s operations over time/1 worker, 90% reads: 24.20 M/s operations over time/2 workers, 10% reads: 5.02 M/s operations over time/2 workers, 50% reads: 3.06 M/s operations over time/2 workers, 90% reads: 8.62 M/s operations over time/4 workers, 10% reads: 6.94 M/s operations over time/4 workers, 50% reads: 2.60 M/s operations over time/4 workers, 90% reads: 9.64 M/s operations over time/8 workers, 10% reads: 2.03 M/s operations over time/8 workers, 50% reads: 1.90 M/s operations over time/8 workers, 90% reads: 4.17 M/s operations over time/one domain, 10% reads: 31.25 M/s operations over time/one domain, 50% reads: 29.92 M/s operations over time/one domain, 90% reads: 40.76 M/s time per operation/1 worker, 10% reads: 47.66 ns time per operation/1 worker, 50% reads: 49.75 ns time per operation/1 worker, 90% reads: 41.33 ns time per operation/2 workers, 10% reads: 398.21 ns time per operation/2 workers, 50% reads: 654.23 ns time per operation/2 workers, 90% reads: 231.95 ns time per operation/4 workers, 10% reads: 575.96 ns time per operation/4 workers, 50% reads: 1535.97 ns time per operation/4 workers, 90% reads: 414.97 ns time per operation/8 workers, 10% reads: 3942.46 ns time per operation/8 workers, 50% reads: 4221.24 ns time per operation/8 workers, 90% reads: 1916.44 ns time per operation/one domain, 10% reads: 32.00 ns time per operation/one domain, 50% reads: 33.43 ns time per operation/one domain, 90% reads: 24.53 ns Queue: messages over time/one domain: 43.67 M/s time per message/one domain: 22.90 ns Ref with Mutex: ops over time/cas int: 48.42 M/s ops over time/get: 55.44 M/s ops over time/incr: 55.39 M/s ops over time/push & pop: 37.13 M/s ops over time/swap: 48.42 M/s ops over time/xchg int: 49.06 M/s time per op/cas int: 20.65 ns time per op/get: 18.04 ns time per op/incr: 18.05 ns time per op/push & pop: 26.93 ns time per op/swap: 20.65 ns time per op/xchg int: 20.38 ns Ref with [@poll error]: ops over time/cas int: 255.72 M/s ops over time/get: 3556.39 M/s ops over time/incr: 742.01 M/s ops over time/push & pop: 64.64 M/s ops over time/swap: 125.04 M/s ops over time/xchg int: 279.61 M/s time per op/cas int: 3.91 ns time per op/get: 0.28 ns time per op/incr: 1.35 ns time per op/push & pop: 15.47 ns time per op/swap: 8.00 ns time per op/xchg int: 3.58 ns Stack: messages over time/one domain: 50.13 M/s time per message/one domain: 19.95 ns Unix: blocking reads over time/1 worker: 1.53 M/s blocking reads over time/2 workers: 3.10 M/s blocking reads over time/4 workers: 6.23 M/s time per blocking read/1 worker: 653.78 ns time per blocking read/2 workers: 644.26 ns time per blocking read/4 workers: 642.32 ns 2026-02-15 19:13.27 ---> saved as "c0d00fc7dde92e06b0819979c11e95a0bbc18922f29698ccf0cf6b376dc426c9" Job succeeded 2026-02-15 19:13.27: Job succeeded