macOS
Homebrew已验证 · 100%
brew install libcpucycleslocal Homebrew formula metadata
安装
其他安装命令
Linux
Fedora dnf已验证 · 92%
sudo dnf install libcpucyclesFedora Rawhide package metadata · libcpucycles · 来源: dl.fedoraproject.org
Nix已验证 · 92%
nix profile install nixpkgs#libcpucyclesnixpkgs package indexes · pkgs/by-name/li/libcpucycles/package.nix · 来源: api.github.com
Debian apt已验证 · 92%
sudo apt install cpucyclesDebian stable package indexes · cpucycles · 来源: deb.debian.org
概览
软件包摘要
Microlibrary for counting CPU cycles
历史
项目历史与用法
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.
项目历史
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.
采用历史
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.
使用方式
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.
为什么软件包爱好者会关心
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.
时间线
- 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.
来源
安全态势
风险级别：绿色
library-like package without higher-risk signals.
风险分类器
绿色 风险 · 低 置信度 · appliance
原因
- library-like package without higher-risk signals
信号
- metadata:library-like
安装行为
- formula 元数据中未记录 Homebrew post-install 钩子。
- Homebrew bottle 元数据适用于 6 个平台目标。
建议审查
在无人值守的代理使用前，请检查该工具是否读取明文凭据、写入远程状态、发布制品或调用插件。
可执行文件
已安装的可执行文件
| 命令 | 类型 | 暴露范围 | 备注 |
|---|---|---|---|
cpucycles-info | cli | 全局可执行文件 | |
cpucycles-open | cli | 全局可执行文件 |
新鲜度
版本和新鲜度
这些信号区分页生成时间、软件包管理器活动和上游发布比较。只有存在证据 URL 和可比较版本时，才会提示版本落后。
页面生成时间2026-07-26
管理器版本20260625
管理器更新时间2026-06-25
本地数据OK
上游not checked
检测到的最新版本未检测到
- 信息Release/tag comparison is only available for GitHub repositories.https://cpucycles.cr.yp.to/none 置信度
安装元数据
软件包元数据
| 软件包键 | brew:libcpucycles |
|---|---|
| 版本 | 20260625 |
| 软件包管理器 | Homebrew |
| 软件包管理器页面 | https://formulae.brew.sh/formula/libcpucycles |
| 主页 | https://cpucycles.cr.yp.to/ |
| 上游文档 | https://cpucycles.cr.yp.to/ |
| 许可证 | LicenseRef-Homebrew-public-domain OR CC0-1.0 OR 0BSD OR MIT-0 OR MIT |
| 源码归档 | https://cpucycles.cr.yp.to/libcpucycles-20260625.tar.gz |
| 最后更新 | 2026-06-25T22:50:15Z |
| Pulse | updated |
| Bottle | 可用 (于 arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux) |
| Homebrew post-install | 未定义 |
| 服务 | 未声明 |
注册表事实
源数据库详情
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | libcpucycles |
| Version Scheme | 0 |
| Revision | 0 |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
源数据库匹配
其他软件包管理器记录
匹配项来自外部软件包管理器索引，并与本地 Automic Vault 软件包链接分开显示。
Debian apt95%
cpucycles 0~20240318-2
command-line tool for counting CPU cycles (libcpucycles)
sudo apt install cpucycles- Section: devel
- Architecture: amd64
- Source Package: libcpucycles
- 2 依赖
- normalized package name match
- 匹配方式：Libcpucycles
Debian apt95%
libcpucycles-dev 0~20240318-2
library for counting CPU cycles - development files
sudo apt install libcpucycles-dev- Section: libdevel
- Architecture: amd64
- Source Package: libcpucycles
- 1 依赖
- normalized package name match
- 匹配方式：Libcpucycles
Debian apt95%
libcpucycles1 0~20240318-2
library for counting CPU cycles
sudo apt install libcpucycles1- Section: libs
- Architecture: amd64
- Source Package: libcpucycles
- 1 依赖
- normalized package name match
- 匹配方式：Libcpucycles
Nix95%
libcpucycles
nix profile install nixpkgs#libcpucycles- normalized package name match
- 匹配方式：Libcpucycles
Ubuntu apt95%
cpucycles 0~20240114-1
command-line tool for counting CPU cycles (libcpucycles)
sudo apt install cpucycles- Section: universe/devel
- Architecture: amd64
- Source Package: libcpucycles
- 2 依赖
- normalized package name match
- 匹配方式：Libcpucycles
Ubuntu apt95%
libcpucycles-dev 0~20240114-1
library for counting CPU cycles - development files
sudo apt install libcpucycles-dev- Section: universe/libdevel
- Architecture: amd64
- Source Package: libcpucycles
- 1 依赖
- normalized package name match
- 匹配方式：Libcpucycles
Ubuntu apt95%
libcpucycles1 0~20240114-1
library for counting CPU cycles
sudo apt install libcpucycles1- Section: universe/libs
- Architecture: amd64
- Source Package: libcpucycles
- 1 依赖
- normalized package name match
- 匹配方式：Libcpucycles
dnf95%
libcpucycles 20260105-1.fc44
Library for counting CPU cycles
sudo dnf install libcpucycles- License: LicenseRef-Fedora-Public-Domain OR 0BSD OR MIT-0 OR MIT
- Category: Unspecified
- Architecture: i686
- Source Package: libcpucycles
- 4 依赖
- 2 提供
- normalized package name match
- 匹配方式：Libcpucycles
dnf95%
libcpucycles-devel 20260105-1.fc44
Development files for libcpucycles
sudo dnf install libcpucycles-devel- License: LicenseRef-Fedora-Public-Domain OR 0BSD OR MIT-0 OR MIT
- Category: Unspecified
- Architecture: i686
- Source Package: libcpucycles
- 2 依赖
- 1 提供
- normalized package name match
- 匹配方式：Libcpucycles
dnf95%
libcpucycles-static 20260105-1.fc44
Static version of the libcpucycles library
sudo dnf install libcpucycles-static- License: LicenseRef-Fedora-Public-Domain OR 0BSD OR MIT-0 OR MIT
- Category: Unspecified
- Architecture: i686
- Source Package: libcpucycles
- 1 依赖
- 1 提供
- normalized package name match
- 匹配方式：Libcpucycles
来源线索
由仓库数据生成
此页面由 av-web 从 scripts/generate-pkg-sqlite.py 生成的私有软件包 SQLite 工件提供。
Combined YAML source
View the package source record on GitHub.
使用的来源
- Geiger risk classifier
- Nucleus package database
- av.db category and tag curation
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- package relationship graph
- package version freshness
- package-page enrichment