# libcpucycles mit Homebrew, dnf, Nix, apt installieren Prüfe Installationswege, Executables, Metadaten und Sicherheitshinweise für libcpucycles in AI-Agent-Workflows. ## Installation ```sh sudo av install brew:libcpucycles ``` Weitere Installationsbefehle: ### macOS - Homebrew (100%): ```sh brew install libcpucycles ``` Evidenz: local Homebrew formula metadata ### Linux - dnf (92%): ```sh sudo dnf install libcpucycles ``` Evidenz: Fedora Rawhide package metadata: libcpucycles from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst - Nix (92%): ```sh nix profile install nixpkgs#libcpucycles ``` Evidenz: nixpkgs package indexes: pkgs/by-name/li/libcpucycles/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Debian apt (92%): ```sh sudo apt install cpucycles ``` Evidenz: Debian stable package indexes: cpucycles from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz ## Paketfakten - **Paketschlüssel:** brew:libcpucycles - **Paketmanager:** Homebrew - **Paketmanager-Seite:** - **Version:** 20260625 - **Quellzusammenfassung:** Microlibrary for counting CPU cycles - **Homepage:** - **Upstream-Dokumentation:** - **Lizenz:** LicenseRef-Homebrew-public-domain OR CC0-1.0 OR 0BSD OR MIT-0 OR MIT - **Quellarchiv:** - **Generiert:** 2026-08-04T22:13:35+00:00 ## Executables - cpucycles-info (cli) - cpucycles-open (cli) - cpucycles-info (Alias) - cpucycles-open (Alias) ## Installationsverhalten - Post-install-Hook: nicht definiert - Bottle: verfügbar auf arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux ## Version und Aktualität - Seite generiert: 2026-08-04 - Manager-Version: 20260625 - lokale Daten: OK - Upstream-Repository: https://cpucycles.cr.yp.to/ - Info: No package-manager update timestamp was available. - Info: Release/tag comparison is only available for GitHub repositories. ## Projektgeschichte und Nutzung libcpucycles is a small timing library for counting CPU cycles across multiple CPU and operating-system counter mechanisms. It comes from the cr.yp.to ecosystem associated with Daniel J. Bernstein's performance-oriented cryptographic and systems software. ### Projektgeschichte The official introduction describes libcpucycles as a microlibrary for cycle counting, with a simple API: include `cpucycles.h`, call `cpucycles()`, and link with `-lcpucycles`. The project abstracts machine-level counters such as amd64 TSC/PMC, ARM counters, RISC-V counters, and OS fallbacks such as `mach_absolute_time`, `perf_event`, `CLOCK_MONOTONIC`, and `gettimeofday`. The release notes visible in the 20250925 documentation show active portability work after the early 2023 tarballs, including s390x counter support, FreeBSD support, arm32-1176 support, a `cpucycles-info` man page, and macOS build fixes. ### Adoptionsgeschichte Adoption is concentrated among developers who need reproducible low-overhead timing for cryptography, benchmarking, and systems tuning. Its appearance in Homebrew, Debian, Ubuntu, Fedora-family packages, and Nix reflects a package-manager role as a tiny measurement primitive rather than an end-user application. ### Wie es verwendet wird Programmers use libcpucycles when they want an architecture-aware cycle counter without writing per-platform assembly and fallback code. Package users also get tools such as `cpucycles-info` and `cpucycles-open`, which help inspect available counters and support benchmarking workflows. ### Warum Paket-Nerds sich dafür interessieren libcpucycles is package-nerd interesting because it packages the messy hardware reality of cycle counters into a minimal library. It is deliberately small, but its value is in the portability table: one dependency handles CPU families and OS timing APIs that would otherwise become build-system conditionals in every benchmark. ### Zeitleiste - 2023-01-10: Release notes document `cpucycles_version()` and s390x counter work. - 2023-01-15: Release notes mention behavior alignment for `cpucycles_version()`. - 2024-01-14: Release notes add arm32-1176 counter support, FreeBSD support, and install/license documentation updates. - 2024-03-18: Release notes mention macOS porting fixes and the `cpucycles-info` man page. - 2025-09-25: Documentation tree published for libcpucycles-20250925. ### Related projects - Related projects include the broader cr.yp.to software family, architecture-specific cycle counters such as TSC and PMC, Linux `perf_event`, POSIX clocks, and benchmarking code in cryptographic libraries. ### Quellen - - - - ## Sicherheitshinweise library-like package without higher-risk signals. - **Geiger-Risiko:** grün / niedrig - library-like package without higher-risk signals ## Details aus der Quelldatenbank - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** libcpucycles - **Version Scheme:** 0 - **Revision:** 0 - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** stable ## Andere Paketmanager-Einträge - Debian apt - cpucycles - 0~20240318-2: normalized package name match | Debian stable package indexes: cpucycles from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | command-line tool for counting CPU cycles (libcpucycles) | https://cpucycles.cr.yp.to/ - Debian apt - libcpucycles-dev - 0~20240318-2: normalized package name match | Debian stable package indexes: libcpucycles-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | library for counting CPU cycles - development files | https://cpucycles.cr.yp.to/ - Debian apt - libcpucycles1 - 0~20240318-2: normalized package name match | Debian stable package indexes: libcpucycles1 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | library for counting CPU cycles | https://cpucycles.cr.yp.to/ - Nix - libcpucycles: normalized package name match | nixpkgs package indexes: pkgs/by-name/li/libcpucycles/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - cpucycles - 0~20240114-1: normalized package name match | Ubuntu 24.04 LTS package indexes: cpucycles from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | command-line tool for counting CPU cycles (libcpucycles) | https://cpucycles.cr.yp.to/ - Ubuntu apt - libcpucycles-dev - 0~20240114-1: normalized package name match | Ubuntu 24.04 LTS package indexes: libcpucycles-dev from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | library for counting CPU cycles - development files | https://cpucycles.cr.yp.to/ - Ubuntu apt - libcpucycles1 - 0~20240114-1: normalized package name match | Ubuntu 24.04 LTS package indexes: libcpucycles1 from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | library for counting CPU cycles | https://cpucycles.cr.yp.to/ - dnf - libcpucycles - 20260625-2.fc45: normalized package name match | Fedora Rawhide package metadata: libcpucycles from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Library for counting CPU cycles | https://cpucycles.cr.yp.to/ - dnf - libcpucycles-devel - 20260625-2.fc45: normalized package name match | Fedora Rawhide package metadata: libcpucycles-devel from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Development files for libcpucycles | https://cpucycles.cr.yp.to/ - dnf - libcpucycles-static - 20260625-2.fc45: normalized package name match | Fedora Rawhide package metadata: libcpucycles-static from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Static version of the libcpucycles library | https://cpucycles.cr.yp.to/ ## Verwandte Links - [Terminal utility packages](https://pkg.so/de/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Networking and protocol packages](https://pkg.so/de/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [Homebrew utility packages](https://pkg.so/de/brew-utility-packages/) - Matched Homebrew package provider. - [Secret-risk packages](https://pkg.so/de/secret-risk-packages/) - Matched curated package taxonomy and local package facts. - [libeatmydata](https://pkg.so/de/brew/libeatmydata/) - Shares pkgdb curated category or tags: cli, performance, system. - [libzip](https://pkg.so/de/brew/libzip/) - Shares pkgdb curated category or tags: c, cli, library, system. - [jemalloc](https://pkg.so/de/brew/jemalloc/) - Shares pkgdb curated category or tags: c, cli, performance, system. - [phoronix-test-suite](https://pkg.so/de/brew/phoronix-test-suite/) - Shares pkgdb curated category or tags: benchmarking, cli, performance, system. - [liblockfile](https://pkg.so/de/brew/liblockfile/) - Shares pkgdb curated category or tags: c, cli, library, system. - [libcpuid](https://pkg.so/de/brew/libcpuid/) - Shares pkgdb curated category or tags: c, cli, library, system. - [zstd](https://pkg.so/de/brew/zstd/) - Shares pkgdb curated category or tags: cli, library, system. - [keyutils](https://pkg.so/de/brew/keyutils/) - Shares pkgdb curated category or tags: cli, library, system. - [asitop](https://pkg.so/de/brew/asitop/) - Local package facts share a topical domain. Shared terms: cli, cpu, performance, system. ## Combined YAML source View the package source record on GitHub. [combined/libcpucycles.yml](https://github.com/mxcl/pkgdb/blob/main/combined/libcpucycles.yml) ## Quellen - pkg.so package database - Geiger risk classifier - package-page enrichment - curated package history - package version freshness - pkgdb category and tag curation - package relationship graph - external package-manager database matches - cross-ecosystem install command graph