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。
local files
Configuration and credential file locations
These source-backed paths show where this package keeps local settings or durable credentials. Automic Vault can use them as review targets for secret scanning, migration, and command approval.
Configuration files
Config paths the tool may read or write during local use.
- Unix
/etc/cpucyclespersecond
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2026-09-19
管理器版本20260901
管理器更新时间
本地数据OK
上游not checked
检测到的最新版本未检测到
- 信息No package-manager update timestamp was available.低 置信度
- 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 | 20260901 |
| 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 |
| 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 20260625-2.fc45
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 20260625-2.fc45
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 20260625-2.fc45
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
- cross-ecosystem install command graph
- curated configuration and credential file locations
- curated package history
- external package-manager database matches
- package relationship graph
- package version freshness
- package-page enrichment
- pkg.so package database
- pkgdb category and tag curation