--- /dev/null
+{
+ "git": {
+ "sha1": "5bea3c7986c2a5c6763ca1b3f6d6982aca7cdc23"
+ },
+ "path_in_vcs": ""
+}
\ No newline at end of file
--- /dev/null
+name: CI
+on:
+ pull_request:
+ push:
+ branches:
+ - master
+
+env:
+ RUST_BACKTRACE: 1
+ CARGO_TERM_COLOR: always
+
+jobs:
+ ci-pass:
+ name: CI is green
+ runs-on: ubuntu-latest
+ needs:
+ - msrv
+ - test-linux
+ - test-macos
+ - test-windows
+ - build-cross
+ - test-cgroups
+ steps:
+ - run: exit 0
+
+ msrv:
+ runs-on: ubuntu-latest
+
+ strategy:
+ matrix:
+ rust:
+ - 1.13
+ target:
+ - x86_64-unknown-linux-gnu
+
+ steps:
+ - uses: actions/checkout@v3
+ - name: Run tests
+ run: |
+ rustup default ${{ matrix.rust }}
+ rustup target add ${{ matrix.target }}
+ cargo test --verbose --target ${{ matrix.target }}
+
+ test-linux:
+ runs-on: ubuntu-latest
+
+ strategy:
+ matrix:
+ rust:
+ - stable
+ - beta
+ - nightly
+ target:
+ - x86_64-unknown-linux-gnu
+ - x86_64-unknown-linux-musl
+
+ steps:
+ - uses: actions/checkout@v3
+ - name: Run tests
+ run: |
+ rustup default ${{ matrix.rust }}
+ rustup target add ${{ matrix.target }}
+ cargo test --verbose --target ${{ matrix.target }}
+
+ test-macos:
+ runs-on: macos-latest
+
+ strategy:
+ matrix:
+ rust:
+ - stable
+ - beta
+ - nightly
+ target:
+ - x86_64-apple-darwin
+
+ steps:
+ - uses: actions/checkout@v3
+ - name: Run tests
+ run: |
+ rustup default ${{ matrix.rust }}
+ rustup target add ${{ matrix.target }}
+ cargo test --verbose --target ${{ matrix.target }}
+
+ test-windows:
+ runs-on: windows-latest
+
+ strategy:
+ matrix:
+ rust:
+ - stable
+ - beta
+ - nightly
+ target:
+ - x86_64-pc-windows-gnu
+ - x86_64-pc-windows-msvc
+
+ steps:
+ - uses: actions/checkout@v3
+ - name: Run tests
+ run: |
+ rustup default ${{ matrix.rust }}
+ rustup target add ${{ matrix.target }}
+ cargo test --verbose --target ${{ matrix.target }}
+
+ build-cross:
+ runs-on: ubuntu-latest
+
+ strategy:
+ matrix:
+ rust:
+ - stable
+ target:
+ - aarch64-unknown-linux-gnu
+ - i686-pc-windows-gnu
+ - i686-pc-windows-msvc
+ - i686-unknown-linux-gnu
+ - aarch64-apple-darwin
+ - aarch64-pc-windows-msvc
+ - aarch64-unknown-linux-musl
+ - arm-unknown-linux-gnueabi
+ - arm-unknown-linux-gnueabihf
+ - armv7-unknown-linux-gnueabihf
+ - mips-unknown-linux-gnu
+ - mips64-unknown-linux-gnuabi64
+ - mips64el-unknown-linux-gnuabi64
+ - mipsel-unknown-linux-gnu
+ - powerpc-unknown-linux-gnu
+ - powerpc64-unknown-linux-gnu
+ - powerpc64le-unknown-linux-gnu
+ - riscv64gc-unknown-linux-gnu
+ - s390x-unknown-linux-gnu
+ - x86_64-unknown-freebsd
+ - x86_64-unknown-illumos
+ - x86_64-unknown-netbsd
+ - i686-linux-android
+ - x86_64-linux-android
+ - arm-linux-androideabi
+ - aarch64-linux-android
+ - x86_64-apple-ios
+ - asmjs-unknown-emscripten
+ - aarch64-apple-ios
+ - aarch64-apple-ios-sim
+ - aarch64-apple-darwin
+ steps:
+ - uses: actions/checkout@v3
+ - name: Run build
+ run: |
+ rustup default ${{ matrix.rust }}
+ rustup target add ${{ matrix.target }}
+ cargo build --verbose --target ${{ matrix.target }}
+
+ test-cgroups:
+ runs-on: ubuntu-latest
+
+ steps:
+ - uses: actions/checkout@v3
+ - name: Test Cgroup
+ run: |
+ docker build -f ci/cgroups/Dockerfile -t num-cpus-cgroups .
+ # Test without cgroups
+ docker run -e NUM_CPUS_TEST_GET=2 num-cpus-cgroups
+ # Only 1 CPU
+ docker run --cpus="1" -e NUM_CPUS_TEST_GET=1 num-cpus-cgroups
+ # 1.5 CPUs
+ docker run --cpus="1.5" -e NUM_CPUS_TEST_GET=2 num-cpus-cgroups
--- /dev/null
+target
+Cargo.lock
--- /dev/null
+## v1.15.0
+
+### Fixes
+
+- update hermit-abi
+
+## v1.14.0
+
+### Features
+
+- add support for cgroups v2
+- Skip reading files in Miri
+
+## v1.13.1
+
+### Fixes
+
+- fix parsing zero or multiple optional fields in cgroup mountinfo.
+
+## v1.13.0
+
+### Features
+
+- add Linux cgroups support when calling `get()`.
+
+## v1.12.0
+
+#### Fixes
+
+- fix `get` on OpenBSD to ignore offline CPUs
+- implement `get_physical` on OpenBSD
+
+## v1.11.1
+
+#### Fixes
+
+- Use `mem::zeroed` instead of `mem::uninitialized`.
+
+## v1.11.0
+
+#### Features
+
+- add `hermit` target OS support
+- removes `bitrig` support
+
+#### Fixes
+
+- fix `get_physical` count with AMD hyperthreading.
+
+## v1.10.1
+
+#### Fixes
+
+- improve `haiku` CPU detection
+
+## v1.10.0
+
+#### Features
+
+- add `illumos` target OS support
+- add default fallback if target is unknown to `1`
+
+## v1.9.0
+
+#### Features
+
+- add `sgx` target env support
+
+## v1.8.0
+
+#### Features
+
+- add `wasm-unknown-unknown` target support
+
+## v1.7.0
+
+#### Features
+
+- add `get_physical` support for macOS
+
+#### Fixes
+
+- use `_SC_NPROCESSORS_CONF` on Unix targets
+
+### v1.6.2
+
+#### Fixes
+
+- revert 1.6.1 for now
+
+### v1.6.1
+
+#### Fixes
+
+- fixes sometimes incorrect num on Android/ARM Linux (#45)
+
+## v1.6.0
+
+#### Features
+
+- `get_physical` gains Windows support
+
+### v1.5.1
+
+#### Fixes
+
+- fix `get` to return 1 if `sysconf(_SC_NPROCESSORS_ONLN)` failed
+
+## v1.5.0
+
+#### Features
+
+- `get()` now checks `sched_affinity` on Linux
+
+## v1.4.0
+
+#### Features
+
+- add `haiku` target support
+
+## v1.3.0
+
+#### Features
+
+- add `redox` target support
+
+### v1.2.1
+
+#### Fixes
+
+- fixes `get_physical` count (454ff1b)
+
+## v1.2.0
+
+#### Features
+
+- add `emscripten` target support
+- add `fuchsia` target support
+
+## v1.1.0
+
+#### Features
+
+- added `get_physical` function to return number of physical CPUs found
+
+# v1.0.0
+
+#### Features
+
+- `get` function returns number of CPUs (physical and virtual) of current platform
--- /dev/null
+# Contributing
+
+## License
+
+Licensed under either of
+
+ * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any
+additional terms or conditions.
--- /dev/null
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+name = "num_cpus"
+version = "1.15.0"
+authors = ["Sean McArthur <sean@seanmonstar.com>"]
+description = "Get the number of CPUs on a machine."
+documentation = "https://docs.rs/num_cpus"
+readme = "README.md"
+keywords = [
+ "cpu",
+ "cpus",
+ "cores",
+]
+categories = ["hardware-support"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/seanmonstar/num_cpus"
+
+[target."cfg(all(any(target_arch = \"x86_64\", target_arch = \"aarch64\"), target_os = \"hermit\"))".dependencies.hermit-abi]
+version = "0.2.6"
+
+[target."cfg(not(windows))".dependencies.libc]
+version = "0.2.26"
--- /dev/null
+[package]
+
+name = "num_cpus"
+version = "1.15.0"
+description = "Get the number of CPUs on a machine."
+authors = ["Sean McArthur <sean@seanmonstar.com>"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/seanmonstar/num_cpus"
+documentation = "https://docs.rs/num_cpus"
+keywords = ["cpu", "cpus", "cores"]
+categories = ["hardware-support"]
+readme = "README.md"
+
+[target.'cfg(not(windows))'.dependencies]
+libc = "0.2.26"
+
+[target.'cfg(all(any(target_arch = "x86_64", target_arch = "aarch64"), target_os = "hermit"))'.dependencies]
+hermit-abi = "0.2.6"
--- /dev/null
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+you may not use this file except in compliance with the License.
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+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
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+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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--- /dev/null
+Copyright (c) 2015
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
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+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
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+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
--- /dev/null
+# num_cpus
+
+[](https://crates.io/crates/num_cpus)
+[](https://travis-ci.org/seanmonstar/num_cpus)
+[](https://ci.appveyor.com/project/seanmonstar/num-cpus)
+
+- [Documentation](https://docs.rs/num_cpus)
+- [CHANGELOG](CHANGELOG.md)
+
+Count the number of CPUs on the current machine.
+
+## Usage
+
+Add to Cargo.toml:
+
+```toml
+[dependencies]
+num_cpus = "1.0"
+```
+
+In your `main.rs` or `lib.rs`:
+
+```rust
+extern crate num_cpus;
+
+// count logical cores this process could try to use
+let num = num_cpus::get();
+```
--- /dev/null
+FROM rust:latest
+
+WORKDIR /usr/num_cpus
+
+COPY . .
+
+RUN cargo build
+
+CMD [ "cargo", "test", "--lib" ]
--- /dev/null
+extern crate num_cpus;
+
+fn main() {
+ println!("Logical CPUs: {}", num_cpus::get());
+ println!("Physical CPUs: {}", num_cpus::get_physical());
+}
--- /dev/null
+12:perf_event:/
+11:cpu,cpuacct:/
+3:devices:/user.slice
--- /dev/null
+1 0 8:1 / / rw,noatime shared:1 - ext4 /dev/sda1 rw,errors=remount-ro,data=reordered
+2 1 0:1 / /dev rw,relatime shared:2 - devtmpfs udev rw,size=10240k,nr_inodes=16487629,mode=755
+3 1 0:2 / /proc rw,nosuid,nodev,noexec,relatime shared:3 - proc proc rw
+4 1 0:3 / /sys rw,nosuid,nodev,noexec,relatime shared:4 - sysfs sysfs rw
+5 4 0:4 / /sys/fs/cgroup ro,nosuid,nodev,noexec shared:5 - tmpfs tmpfs ro,mode=755
+6 5 0:5 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:6 - cgroup cgroup rw,cpuset
+7 5 0:6 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:7 - cgroup cgroup rw,cpu,cpuacct
+8 5 0:7 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:8 - cgroup cgroup rw,memory
--- /dev/null
+1 0 8:1 / / rw,noatime shared:1 - ext4 /dev/sda1 rw,errors=remount-ro,data=reordered
+2 1 0:1 / /dev rw,relatime shared:2 - devtmpfs udev rw,size=10240k,nr_inodes=16487629,mode=755
+3 1 0:2 / /proc rw,nosuid,nodev,noexec,relatime shared:3 - proc proc rw
+4 1 0:3 / /sys rw,nosuid,nodev,noexec,relatime shared:4 - sysfs sysfs rw
+5 4 0:4 / /sys/fs/cgroup ro,nosuid,nodev,noexec shared:5 - tmpfs tmpfs ro,mode=755
+6 5 0:5 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:6 - cgroup cgroup rw,cpuset
+7 5 0:6 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:7 shared:8 shared:9 - cgroup cgroup rw,cpu,cpuacct
+8 5 0:7 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:8 - cgroup cgroup rw,memory
--- /dev/null
+1 0 8:1 / / rw,noatime shared:1 - ext4 /dev/sda1 rw,errors=remount-ro,data=reordered
+2 1 0:1 / /dev rw,relatime shared:2 - devtmpfs udev rw,size=10240k,nr_inodes=16487629,mode=755
+3 1 0:2 / /proc rw,nosuid,nodev,noexec,relatime shared:3 - proc proc rw
+4 1 0:3 / /sys rw,nosuid,nodev,noexec,relatime shared:4 - sysfs sysfs rw
+5 4 0:4 / /sys/fs/cgroup ro,nosuid,nodev,noexec shared:5 - tmpfs tmpfs ro,mode=755
+6 5 0:5 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:6 - cgroup cgroup rw,cpuset
+7 5 0:6 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,cpu,cpuacct
+8 5 0:7 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:8 - cgroup cgroup rw,memory
--- /dev/null
+150000 100000
--- /dev/null
+600000 100000
--- /dev/null
+12::/
+3::/user.slice
--- /dev/null
+12::/
+11:cpu,cpuacct:/
+3::/user.slice
--- /dev/null
+1 0 8:1 / / rw,noatime shared:1 - ext4 /dev/sda1 rw,errors=remount-ro,data=reordered
+2 1 0:1 / /dev rw,relatime shared:2 - devtmpfs udev rw,size=10240k,nr_inodes=16487629,mode=755
+3 1 0:2 / /proc rw,nosuid,nodev,noexec,relatime shared:3 - proc proc rw
+4 1 0:3 / /sys rw,nosuid,nodev,noexec,relatime shared:4 - sysfs sysfs rw
+5 4 0:4 / /sys/fs/cgroup rw,nosuid,nodev,noexec,relatime shared:5 - cgroup2 cgroup2 rw,nsdelegate,memory_recursiveprot
--- /dev/null
+//! A crate with utilities to determine the number of CPUs available on the
+//! current system.
+//!
+//! Sometimes the CPU will exaggerate the number of CPUs it contains, because it can use
+//! [processor tricks] to deliver increased performance when there are more threads. This
+//! crate provides methods to get both the logical and physical numbers of cores.
+//!
+//! This information can be used as a guide to how many tasks can be run in parallel.
+//! There are many properties of the system architecture that will affect parallelism,
+//! for example memory access speeds (for all the caches and RAM) and the physical
+//! architecture of the processor, so the number of CPUs should be used as a rough guide
+//! only.
+//!
+//!
+//! ## Examples
+//!
+//! Fetch the number of logical CPUs.
+//!
+//! ```
+//! let cpus = num_cpus::get();
+//! ```
+//!
+//! See [`rayon::Threadpool`] for an example of where the number of CPUs could be
+//! used when setting up parallel jobs (Where the threadpool example uses a fixed
+//! number 8, it could use the number of CPUs).
+//!
+//! [processor tricks]: https://en.wikipedia.org/wiki/Simultaneous_multithreading
+//! [`rayon::ThreadPool`]: https://docs.rs/rayon/1.*/rayon/struct.ThreadPool.html
+#![cfg_attr(test, deny(warnings))]
+#![deny(missing_docs)]
+#![allow(non_snake_case)]
+
+#[cfg(not(windows))]
+extern crate libc;
+
+#[cfg(target_os = "hermit")]
+extern crate hermit_abi;
+
+#[cfg(target_os = "linux")]
+mod linux;
+#[cfg(target_os = "linux")]
+use linux::{get_num_cpus, get_num_physical_cpus};
+
+/// Returns the number of available CPUs of the current system.
+///
+/// This function will get the number of logical cores. Sometimes this is different from the number
+/// of physical cores (See [Simultaneous multithreading on Wikipedia][smt]).
+///
+/// This will always return at least `1`.
+///
+/// # Examples
+///
+/// ```
+/// let cpus = num_cpus::get();
+/// if cpus > 1 {
+/// println!("We are on a multicore system with {} CPUs", cpus);
+/// } else {
+/// println!("We are on a single core system");
+/// }
+/// ```
+///
+/// # Note
+///
+/// This will check [sched affinity] on Linux, showing a lower number of CPUs if the current
+/// thread does not have access to all the computer's CPUs.
+///
+/// This will also check [cgroups], frequently used in containers to constrain CPU usage.
+///
+/// [smt]: https://en.wikipedia.org/wiki/Simultaneous_multithreading
+/// [sched affinity]: http://www.gnu.org/software/libc/manual/html_node/CPU-Affinity.html
+/// [cgroups]: https://www.kernel.org/doc/Documentation/cgroup-v1/cgroups.txt
+#[inline]
+pub fn get() -> usize {
+ get_num_cpus()
+}
+
+/// Returns the number of physical cores of the current system.
+///
+/// This will always return at least `1`.
+///
+/// # Note
+///
+/// Physical count is supported only on Linux, mac OS and Windows platforms.
+/// On other platforms, or if the physical count fails on supported platforms,
+/// this function returns the same as [`get()`], which is the number of logical
+/// CPUS.
+///
+/// # Examples
+///
+/// ```
+/// let logical_cpus = num_cpus::get();
+/// let physical_cpus = num_cpus::get_physical();
+/// if logical_cpus > physical_cpus {
+/// println!("We have simultaneous multithreading with about {:.2} \
+/// logical cores to 1 physical core.",
+/// (logical_cpus as f64) / (physical_cpus as f64));
+/// } else if logical_cpus == physical_cpus {
+/// println!("Either we don't have simultaneous multithreading, or our \
+/// system doesn't support getting the number of physical CPUs.");
+/// } else {
+/// println!("We have less logical CPUs than physical CPUs, maybe we only have access to \
+/// some of the CPUs on our system.");
+/// }
+/// ```
+///
+/// [`get()`]: fn.get.html
+#[inline]
+pub fn get_physical() -> usize {
+ get_num_physical_cpus()
+}
+
+
+#[cfg(not(any(target_os = "linux", target_os = "windows", target_os="macos", target_os="openbsd")))]
+#[inline]
+fn get_num_physical_cpus() -> usize {
+ // Not implemented, fall back
+ get_num_cpus()
+}
+
+#[cfg(target_os = "windows")]
+fn get_num_physical_cpus() -> usize {
+ match get_num_physical_cpus_windows() {
+ Some(num) => num,
+ None => get_num_cpus()
+ }
+}
+
+#[cfg(target_os = "windows")]
+fn get_num_physical_cpus_windows() -> Option<usize> {
+ // Inspired by https://msdn.microsoft.com/en-us/library/ms683194
+
+ use std::ptr;
+ use std::mem;
+
+ #[allow(non_upper_case_globals)]
+ const RelationProcessorCore: u32 = 0;
+
+ #[repr(C)]
+ #[allow(non_camel_case_types)]
+ struct SYSTEM_LOGICAL_PROCESSOR_INFORMATION {
+ mask: usize,
+ relationship: u32,
+ _unused: [u64; 2]
+ }
+
+ extern "system" {
+ fn GetLogicalProcessorInformation(
+ info: *mut SYSTEM_LOGICAL_PROCESSOR_INFORMATION,
+ length: &mut u32
+ ) -> u32;
+ }
+
+ // First we need to determine how much space to reserve.
+
+ // The required size of the buffer, in bytes.
+ let mut needed_size = 0;
+
+ unsafe {
+ GetLogicalProcessorInformation(ptr::null_mut(), &mut needed_size);
+ }
+
+ let struct_size = mem::size_of::<SYSTEM_LOGICAL_PROCESSOR_INFORMATION>() as u32;
+
+ // Could be 0, or some other bogus size.
+ if needed_size == 0 || needed_size < struct_size || needed_size % struct_size != 0 {
+ return None;
+ }
+
+ let count = needed_size / struct_size;
+
+ // Allocate some memory where we will store the processor info.
+ let mut buf = Vec::with_capacity(count as usize);
+
+ let result;
+
+ unsafe {
+ result = GetLogicalProcessorInformation(buf.as_mut_ptr(), &mut needed_size);
+ }
+
+ // Failed for any reason.
+ if result == 0 {
+ return None;
+ }
+
+ let count = needed_size / struct_size;
+
+ unsafe {
+ buf.set_len(count as usize);
+ }
+
+ let phys_proc_count = buf.iter()
+ // Only interested in processor packages (physical processors.)
+ .filter(|proc_info| proc_info.relationship == RelationProcessorCore)
+ .count();
+
+ if phys_proc_count == 0 {
+ None
+ } else {
+ Some(phys_proc_count)
+ }
+}
+
+#[cfg(windows)]
+fn get_num_cpus() -> usize {
+ #[repr(C)]
+ struct SYSTEM_INFO {
+ wProcessorArchitecture: u16,
+ wReserved: u16,
+ dwPageSize: u32,
+ lpMinimumApplicationAddress: *mut u8,
+ lpMaximumApplicationAddress: *mut u8,
+ dwActiveProcessorMask: *mut u8,
+ dwNumberOfProcessors: u32,
+ dwProcessorType: u32,
+ dwAllocationGranularity: u32,
+ wProcessorLevel: u16,
+ wProcessorRevision: u16,
+ }
+
+ extern "system" {
+ fn GetSystemInfo(lpSystemInfo: *mut SYSTEM_INFO);
+ }
+
+ unsafe {
+ let mut sysinfo: SYSTEM_INFO = std::mem::zeroed();
+ GetSystemInfo(&mut sysinfo);
+ sysinfo.dwNumberOfProcessors as usize
+ }
+}
+
+#[cfg(any(target_os = "freebsd",
+ target_os = "dragonfly",
+ target_os = "netbsd"))]
+fn get_num_cpus() -> usize {
+ use std::ptr;
+
+ let mut cpus: libc::c_uint = 0;
+ let mut cpus_size = std::mem::size_of_val(&cpus);
+
+ unsafe {
+ cpus = libc::sysconf(libc::_SC_NPROCESSORS_ONLN) as libc::c_uint;
+ }
+ if cpus < 1 {
+ let mut mib = [libc::CTL_HW, libc::HW_NCPU, 0, 0];
+ unsafe {
+ libc::sysctl(mib.as_mut_ptr(),
+ 2,
+ &mut cpus as *mut _ as *mut _,
+ &mut cpus_size as *mut _ as *mut _,
+ ptr::null_mut(),
+ 0);
+ }
+ if cpus < 1 {
+ cpus = 1;
+ }
+ }
+ cpus as usize
+}
+
+#[cfg(target_os = "openbsd")]
+fn get_num_cpus() -> usize {
+ use std::ptr;
+
+ let mut cpus: libc::c_uint = 0;
+ let mut cpus_size = std::mem::size_of_val(&cpus);
+ let mut mib = [libc::CTL_HW, libc::HW_NCPUONLINE, 0, 0];
+ let rc: libc::c_int;
+
+ unsafe {
+ rc = libc::sysctl(mib.as_mut_ptr(),
+ 2,
+ &mut cpus as *mut _ as *mut _,
+ &mut cpus_size as *mut _ as *mut _,
+ ptr::null_mut(),
+ 0);
+ }
+ if rc < 0 {
+ cpus = 1;
+ }
+ cpus as usize
+}
+
+#[cfg(target_os = "openbsd")]
+fn get_num_physical_cpus() -> usize {
+ use std::ptr;
+
+ let mut cpus: libc::c_uint = 0;
+ let mut cpus_size = std::mem::size_of_val(&cpus);
+ let mut mib = [libc::CTL_HW, libc::HW_NCPU, 0, 0];
+ let rc: libc::c_int;
+
+ unsafe {
+ rc = libc::sysctl(mib.as_mut_ptr(),
+ 2,
+ &mut cpus as *mut _ as *mut _,
+ &mut cpus_size as *mut _ as *mut _,
+ ptr::null_mut(),
+ 0);
+ }
+ if rc < 0 {
+ cpus = 1;
+ }
+ cpus as usize
+}
+
+
+#[cfg(target_os = "macos")]
+fn get_num_physical_cpus() -> usize {
+ use std::ffi::CStr;
+ use std::ptr;
+
+ let mut cpus: i32 = 0;
+ let mut cpus_size = std::mem::size_of_val(&cpus);
+
+ let sysctl_name = CStr::from_bytes_with_nul(b"hw.physicalcpu\0")
+ .expect("byte literal is missing NUL");
+
+ unsafe {
+ if 0 != libc::sysctlbyname(sysctl_name.as_ptr(),
+ &mut cpus as *mut _ as *mut _,
+ &mut cpus_size as *mut _ as *mut _,
+ ptr::null_mut(),
+ 0) {
+ return get_num_cpus();
+ }
+ }
+ cpus as usize
+}
+
+#[cfg(any(
+ target_os = "nacl",
+ target_os = "macos",
+ target_os = "ios",
+ target_os = "android",
+ target_os = "solaris",
+ target_os = "illumos",
+ target_os = "fuchsia")
+)]
+fn get_num_cpus() -> usize {
+ // On ARM targets, processors could be turned off to save power.
+ // Use `_SC_NPROCESSORS_CONF` to get the real number.
+ #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
+ const CONF_NAME: libc::c_int = libc::_SC_NPROCESSORS_CONF;
+ #[cfg(not(any(target_arch = "arm", target_arch = "aarch64")))]
+ const CONF_NAME: libc::c_int = libc::_SC_NPROCESSORS_ONLN;
+
+ let cpus = unsafe { libc::sysconf(CONF_NAME) };
+ if cpus < 1 {
+ 1
+ } else {
+ cpus as usize
+ }
+}
+
+#[cfg(target_os = "haiku")]
+fn get_num_cpus() -> usize {
+ use std::mem;
+
+ #[allow(non_camel_case_types)]
+ type bigtime_t = i64;
+ #[allow(non_camel_case_types)]
+ type status_t = i32;
+
+ #[repr(C)]
+ pub struct system_info {
+ pub boot_time: bigtime_t,
+ pub cpu_count: u32,
+ pub max_pages: u64,
+ pub used_pages: u64,
+ pub cached_pages: u64,
+ pub block_cache_pages: u64,
+ pub ignored_pages: u64,
+ pub needed_memory: u64,
+ pub free_memory: u64,
+ pub max_swap_pages: u64,
+ pub free_swap_pages: u64,
+ pub page_faults: u32,
+ pub max_sems: u32,
+ pub used_sems: u32,
+ pub max_ports: u32,
+ pub used_ports: u32,
+ pub max_threads: u32,
+ pub used_threads: u32,
+ pub max_teams: u32,
+ pub used_teams: u32,
+ pub kernel_name: [::std::os::raw::c_char; 256usize],
+ pub kernel_build_date: [::std::os::raw::c_char; 32usize],
+ pub kernel_build_time: [::std::os::raw::c_char; 32usize],
+ pub kernel_version: i64,
+ pub abi: u32,
+ }
+
+ extern {
+ fn get_system_info(info: *mut system_info) -> status_t;
+ }
+
+ let mut info: system_info = unsafe { mem::zeroed() };
+ let status = unsafe { get_system_info(&mut info as *mut _) };
+ if status == 0 {
+ info.cpu_count as usize
+ } else {
+ 1
+ }
+}
+
+#[cfg(target_os = "hermit")]
+fn get_num_cpus() -> usize {
+ unsafe { hermit_abi::get_processor_count() }
+}
+
+#[cfg(not(any(
+ target_os = "nacl",
+ target_os = "macos",
+ target_os = "ios",
+ target_os = "android",
+ target_os = "solaris",
+ target_os = "illumos",
+ target_os = "fuchsia",
+ target_os = "linux",
+ target_os = "openbsd",
+ target_os = "freebsd",
+ target_os = "dragonfly",
+ target_os = "netbsd",
+ target_os = "haiku",
+ target_os = "hermit",
+ windows,
+)))]
+fn get_num_cpus() -> usize {
+ 1
+}
+
+#[cfg(test)]
+mod tests {
+ fn env_var(name: &'static str) -> Option<usize> {
+ ::std::env::var(name).ok().map(|val| val.parse().unwrap())
+ }
+
+ #[test]
+ fn test_get() {
+ let num = super::get();
+ if let Some(n) = env_var("NUM_CPUS_TEST_GET") {
+ assert_eq!(num, n);
+ } else {
+ assert!(num > 0);
+ assert!(num < 236_451);
+ }
+ }
+
+ #[test]
+ fn test_get_physical() {
+ let num = super::get_physical();
+ if let Some(n) = env_var("NUM_CPUS_TEST_GET_PHYSICAL") {
+ assert_eq!(num, n);
+ } else {
+ assert!(num > 0);
+ assert!(num < 236_451);
+ }
+ }
+}
--- /dev/null
+use std::collections::HashMap;
+use std::fs::File;
+use std::io::{BufRead, BufReader, Read};
+use std::mem;
+use std::path::{Path, PathBuf};
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::sync::Once;
+
+use libc;
+
+macro_rules! debug {
+ ($($args:expr),*) => ({
+ if false {
+ //if true {
+ println!($($args),*);
+ }
+ });
+}
+
+macro_rules! some {
+ ($e:expr) => {{
+ match $e {
+ Some(v) => v,
+ None => {
+ debug!("NONE: {:?}", stringify!($e));
+ return None;
+ }
+ }
+ }};
+}
+
+pub fn get_num_cpus() -> usize {
+ match cgroups_num_cpus() {
+ Some(n) => n,
+ None => logical_cpus(),
+ }
+}
+
+fn logical_cpus() -> usize {
+ let mut set: libc::cpu_set_t = unsafe { mem::zeroed() };
+ if unsafe { libc::sched_getaffinity(0, mem::size_of::<libc::cpu_set_t>(), &mut set) } == 0 {
+ let mut count: u32 = 0;
+ for i in 0..libc::CPU_SETSIZE as usize {
+ if unsafe { libc::CPU_ISSET(i, &set) } {
+ count += 1
+ }
+ }
+ count as usize
+ } else {
+ let cpus = unsafe { libc::sysconf(libc::_SC_NPROCESSORS_ONLN) };
+ if cpus < 1 {
+ 1
+ } else {
+ cpus as usize
+ }
+ }
+}
+
+pub fn get_num_physical_cpus() -> usize {
+ let file = match File::open("/proc/cpuinfo") {
+ Ok(val) => val,
+ Err(_) => return get_num_cpus(),
+ };
+ let reader = BufReader::new(file);
+ let mut map = HashMap::new();
+ let mut physid: u32 = 0;
+ let mut cores: usize = 0;
+ let mut chgcount = 0;
+ for line in reader.lines().filter_map(|result| result.ok()) {
+ let mut it = line.split(':');
+ let (key, value) = match (it.next(), it.next()) {
+ (Some(key), Some(value)) => (key.trim(), value.trim()),
+ _ => continue,
+ };
+ if key == "physical id" {
+ match value.parse() {
+ Ok(val) => physid = val,
+ Err(_) => break,
+ };
+ chgcount += 1;
+ }
+ if key == "cpu cores" {
+ match value.parse() {
+ Ok(val) => cores = val,
+ Err(_) => break,
+ };
+ chgcount += 1;
+ }
+ if chgcount == 2 {
+ map.insert(physid, cores);
+ chgcount = 0;
+ }
+ }
+ let count = map.into_iter().fold(0, |acc, (_, cores)| acc + cores);
+
+ if count == 0 {
+ get_num_cpus()
+ } else {
+ count
+ }
+}
+
+/// Cached CPUs calculated from cgroups.
+///
+/// If 0, check logical cpus.
+// Allow deprecation warnings, we want to work on older rustc
+#[allow(warnings)]
+static CGROUPS_CPUS: AtomicUsize = ::std::sync::atomic::ATOMIC_USIZE_INIT;
+
+fn cgroups_num_cpus() -> Option<usize> {
+ #[allow(warnings)]
+ static ONCE: Once = ::std::sync::ONCE_INIT;
+
+ ONCE.call_once(init_cgroups);
+
+ let cpus = CGROUPS_CPUS.load(Ordering::Acquire);
+
+ if cpus > 0 {
+ Some(cpus)
+ } else {
+ None
+ }
+}
+
+fn init_cgroups() {
+ // Should only be called once
+ debug_assert!(CGROUPS_CPUS.load(Ordering::SeqCst) == 0);
+
+ // Fails in Miri by default (cannot open files), and Miri does not have parallelism anyway.
+ if cfg!(miri) {
+ return;
+ }
+
+ if let Some(quota) = load_cgroups("/proc/self/cgroup", "/proc/self/mountinfo") {
+ if quota == 0 {
+ return;
+ }
+
+ let logical = logical_cpus();
+ let count = ::std::cmp::min(quota, logical);
+
+ CGROUPS_CPUS.store(count, Ordering::SeqCst);
+ }
+}
+
+fn load_cgroups<P1, P2>(cgroup_proc: P1, mountinfo_proc: P2) -> Option<usize>
+where
+ P1: AsRef<Path>,
+ P2: AsRef<Path>,
+{
+ let subsys = some!(Subsys::load_cpu(cgroup_proc));
+ let mntinfo = some!(MountInfo::load_cpu(mountinfo_proc, subsys.version));
+ let cgroup = some!(Cgroup::translate(mntinfo, subsys));
+ cgroup.cpu_quota()
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum CgroupVersion {
+ V1,
+ V2,
+}
+
+struct Cgroup {
+ version: CgroupVersion,
+ base: PathBuf,
+}
+
+struct MountInfo {
+ version: CgroupVersion,
+ root: String,
+ mount_point: String,
+}
+
+struct Subsys {
+ version: CgroupVersion,
+ base: String,
+}
+
+impl Cgroup {
+ fn new(version: CgroupVersion, dir: PathBuf) -> Cgroup {
+ Cgroup { version: version, base: dir }
+ }
+
+ fn translate(mntinfo: MountInfo, subsys: Subsys) -> Option<Cgroup> {
+ // Translate the subsystem directory via the host paths.
+ debug!(
+ "subsys = {:?}; root = {:?}; mount_point = {:?}",
+ subsys.base, mntinfo.root, mntinfo.mount_point
+ );
+
+ let rel_from_root = some!(Path::new(&subsys.base).strip_prefix(&mntinfo.root).ok());
+
+ debug!("rel_from_root: {:?}", rel_from_root);
+
+ // join(mp.MountPoint, relPath)
+ let mut path = PathBuf::from(mntinfo.mount_point);
+ path.push(rel_from_root);
+ Some(Cgroup::new(mntinfo.version, path))
+ }
+
+ fn cpu_quota(&self) -> Option<usize> {
+ let (quota_us, period_us) = match self.version {
+ CgroupVersion::V1 => (some!(self.quota_us()), some!(self.period_us())),
+ CgroupVersion::V2 => some!(self.max()),
+ };
+
+ // protect against dividing by zero
+ if period_us == 0 {
+ return None;
+ }
+
+ // Ceil the division, since we want to be able to saturate
+ // the available CPUs, and flooring would leave a CPU un-utilized.
+
+ Some((quota_us as f64 / period_us as f64).ceil() as usize)
+ }
+
+ fn quota_us(&self) -> Option<usize> {
+ self.param("cpu.cfs_quota_us")
+ }
+
+ fn period_us(&self) -> Option<usize> {
+ self.param("cpu.cfs_period_us")
+ }
+
+ fn max(&self) -> Option<(usize, usize)> {
+ let max = some!(self.raw_param("cpu.max"));
+ let mut max = some!(max.lines().next()).split(' ');
+
+ let quota = some!(max.next().and_then(|quota| quota.parse().ok()));
+ let period = some!(max.next().and_then(|period| period.parse().ok()));
+
+ Some((quota, period))
+ }
+
+ fn param(&self, param: &str) -> Option<usize> {
+ let buf = some!(self.raw_param(param));
+
+ buf.trim().parse().ok()
+ }
+
+ fn raw_param(&self, param: &str) -> Option<String> {
+ let mut file = some!(File::open(self.base.join(param)).ok());
+
+ let mut buf = String::new();
+ some!(file.read_to_string(&mut buf).ok());
+
+ Some(buf)
+ }
+}
+
+impl MountInfo {
+ fn load_cpu<P: AsRef<Path>>(proc_path: P, version: CgroupVersion) -> Option<MountInfo> {
+ let file = some!(File::open(proc_path).ok());
+ let file = BufReader::new(file);
+
+ file.lines()
+ .filter_map(|result| result.ok())
+ .filter_map(MountInfo::parse_line)
+ .find(|mount_info| mount_info.version == version)
+ }
+
+ fn parse_line(line: String) -> Option<MountInfo> {
+ let mut fields = line.split(' ');
+
+ // 7 5 0:6 </> /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:7 - cgroup cgroup rw,cpu,cpuacct
+ let mnt_root = some!(fields.nth(3));
+ // 7 5 0:6 / </sys/fs/cgroup/cpu,cpuacct> rw,nosuid,nodev,noexec,relatime shared:7 - cgroup cgroup rw,cpu,cpuacct
+ let mnt_point = some!(fields.next());
+
+ // Ignore all fields until the separator(-).
+ // Note: there could be zero or more optional fields before hyphen.
+ // See: https://man7.org/linux/man-pages/man5/proc.5.html
+ // 7 5 0:6 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:7 <-> cgroup cgroup rw,cpu,cpuacct
+ // Note: we cannot use `?` here because we need to support Rust 1.13.
+ match fields.find(|&s| s == "-") {
+ Some(_) => {}
+ None => return None,
+ };
+
+ // 7 5 0:6 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:7 - <cgroup> cgroup rw,cpu,cpuacct
+ let version = match fields.next() {
+ Some("cgroup") => CgroupVersion::V1,
+ Some("cgroup2") => CgroupVersion::V2,
+ _ => return None,
+ };
+
+ // cgroups2 only has a single mount point
+ if version == CgroupVersion::V1 {
+ // 7 5 0:6 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:7 - cgroup cgroup <rw,cpu,cpuacct>
+ let super_opts = some!(fields.nth(1));
+
+ // We only care about the 'cpu' option
+ if !super_opts.split(',').any(|opt| opt == "cpu") {
+ return None;
+ }
+ }
+
+ Some(MountInfo {
+ version: version,
+ root: mnt_root.to_owned(),
+ mount_point: mnt_point.to_owned(),
+ })
+ }
+}
+
+impl Subsys {
+ fn load_cpu<P: AsRef<Path>>(proc_path: P) -> Option<Subsys> {
+ let file = some!(File::open(proc_path).ok());
+ let file = BufReader::new(file);
+
+ file.lines()
+ .filter_map(|result| result.ok())
+ .filter_map(Subsys::parse_line)
+ .fold(None, |previous, line| {
+ // already-found v1 trumps v2 since it explicitly specifies its controllers
+ if previous.is_some() && line.version == CgroupVersion::V2 {
+ return previous;
+ }
+
+ Some(line)
+ })
+ }
+
+ fn parse_line(line: String) -> Option<Subsys> {
+ // Example format:
+ // 11:cpu,cpuacct:/
+ let mut fields = line.split(':');
+
+ let sub_systems = some!(fields.nth(1));
+
+ let version = if sub_systems.is_empty() {
+ CgroupVersion::V2
+ } else {
+ CgroupVersion::V1
+ };
+
+ if version == CgroupVersion::V1 && !sub_systems.split(',').any(|sub| sub == "cpu") {
+ return None;
+ }
+
+ fields.next().map(|path| Subsys {
+ version: version,
+ base: path.to_owned(),
+ })
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ mod v1 {
+ use super::super::{Cgroup, CgroupVersion, MountInfo, Subsys};
+ use std::path::{Path, PathBuf};
+
+ // `static_in_const` feature is not stable in Rust 1.13.
+ static FIXTURES_PROC: &'static str = "fixtures/cgroups/proc/cgroups";
+
+ static FIXTURES_CGROUPS: &'static str = "fixtures/cgroups/cgroups";
+
+ macro_rules! join {
+ ($base:expr, $($path:expr),+) => ({
+ Path::new($base)
+ $(.join($path))+
+ })
+ }
+
+ #[test]
+ fn test_load_mountinfo() {
+ // test only one optional fields
+ let path = join!(FIXTURES_PROC, "mountinfo");
+
+ let mnt_info = MountInfo::load_cpu(path, CgroupVersion::V1).unwrap();
+
+ assert_eq!(mnt_info.root, "/");
+ assert_eq!(mnt_info.mount_point, "/sys/fs/cgroup/cpu,cpuacct");
+
+ // test zero optional field
+ let path = join!(FIXTURES_PROC, "mountinfo_zero_opt");
+
+ let mnt_info = MountInfo::load_cpu(path, CgroupVersion::V1).unwrap();
+
+ assert_eq!(mnt_info.root, "/");
+ assert_eq!(mnt_info.mount_point, "/sys/fs/cgroup/cpu,cpuacct");
+
+ // test multi optional fields
+ let path = join!(FIXTURES_PROC, "mountinfo_multi_opt");
+
+ let mnt_info = MountInfo::load_cpu(path, CgroupVersion::V1).unwrap();
+
+ assert_eq!(mnt_info.root, "/");
+ assert_eq!(mnt_info.mount_point, "/sys/fs/cgroup/cpu,cpuacct");
+ }
+
+ #[test]
+ fn test_load_subsys() {
+ let path = join!(FIXTURES_PROC, "cgroup");
+
+ let subsys = Subsys::load_cpu(path).unwrap();
+
+ assert_eq!(subsys.base, "/");
+ assert_eq!(subsys.version, CgroupVersion::V1);
+ }
+
+ #[test]
+ fn test_cgroup_mount() {
+ let cases = &[
+ ("/", "/sys/fs/cgroup/cpu", "/", Some("/sys/fs/cgroup/cpu")),
+ (
+ "/docker/01abcd",
+ "/sys/fs/cgroup/cpu",
+ "/docker/01abcd",
+ Some("/sys/fs/cgroup/cpu"),
+ ),
+ (
+ "/docker/01abcd",
+ "/sys/fs/cgroup/cpu",
+ "/docker/01abcd/",
+ Some("/sys/fs/cgroup/cpu"),
+ ),
+ (
+ "/docker/01abcd",
+ "/sys/fs/cgroup/cpu",
+ "/docker/01abcd/large",
+ Some("/sys/fs/cgroup/cpu/large"),
+ ),
+ // fails
+ ("/docker/01abcd", "/sys/fs/cgroup/cpu", "/", None),
+ ("/docker/01abcd", "/sys/fs/cgroup/cpu", "/docker", None),
+ ("/docker/01abcd", "/sys/fs/cgroup/cpu", "/elsewhere", None),
+ (
+ "/docker/01abcd",
+ "/sys/fs/cgroup/cpu",
+ "/docker/01abcd-other-dir",
+ None,
+ ),
+ ];
+
+ for &(root, mount_point, subsys, expected) in cases.iter() {
+ let mnt_info = MountInfo {
+ version: CgroupVersion::V1,
+ root: root.into(),
+ mount_point: mount_point.into(),
+ };
+ let subsys = Subsys {
+ version: CgroupVersion::V1,
+ base: subsys.into(),
+ };
+
+ let actual = Cgroup::translate(mnt_info, subsys).map(|c| c.base);
+ let expected = expected.map(PathBuf::from);
+ assert_eq!(actual, expected);
+ }
+ }
+
+ #[test]
+ fn test_cgroup_cpu_quota() {
+ let cgroup = Cgroup::new(CgroupVersion::V1, join!(FIXTURES_CGROUPS, "good"));
+ assert_eq!(cgroup.cpu_quota(), Some(6));
+ }
+
+ #[test]
+ fn test_cgroup_cpu_quota_divide_by_zero() {
+ let cgroup = Cgroup::new(CgroupVersion::V1, join!(FIXTURES_CGROUPS, "zero-period"));
+ assert!(cgroup.quota_us().is_some());
+ assert_eq!(cgroup.period_us(), Some(0));
+ assert_eq!(cgroup.cpu_quota(), None);
+ }
+
+ #[test]
+ fn test_cgroup_cpu_quota_ceil() {
+ let cgroup = Cgroup::new(CgroupVersion::V1, join!(FIXTURES_CGROUPS, "ceil"));
+ assert_eq!(cgroup.cpu_quota(), Some(2));
+ }
+ }
+
+ mod v2 {
+ use super::super::{Cgroup, CgroupVersion, MountInfo, Subsys};
+ use std::path::{Path, PathBuf};
+
+ // `static_in_const` feature is not stable in Rust 1.13.
+ static FIXTURES_PROC: &'static str = "fixtures/cgroups2/proc/cgroups";
+
+ static FIXTURES_CGROUPS: &'static str = "fixtures/cgroups2/cgroups";
+
+ macro_rules! join {
+ ($base:expr, $($path:expr),+) => ({
+ Path::new($base)
+ $(.join($path))+
+ })
+ }
+
+ #[test]
+ fn test_load_mountinfo() {
+ // test only one optional fields
+ let path = join!(FIXTURES_PROC, "mountinfo");
+
+ let mnt_info = MountInfo::load_cpu(path, CgroupVersion::V2).unwrap();
+
+ assert_eq!(mnt_info.root, "/");
+ assert_eq!(mnt_info.mount_point, "/sys/fs/cgroup");
+ }
+
+ #[test]
+ fn test_load_subsys() {
+ let path = join!(FIXTURES_PROC, "cgroup");
+
+ let subsys = Subsys::load_cpu(path).unwrap();
+
+ assert_eq!(subsys.base, "/");
+ assert_eq!(subsys.version, CgroupVersion::V2);
+ }
+
+ #[test]
+ fn test_load_subsys_multi() {
+ let path = join!(FIXTURES_PROC, "cgroup_multi");
+
+ let subsys = Subsys::load_cpu(path).unwrap();
+
+ assert_eq!(subsys.base, "/");
+ assert_eq!(subsys.version, CgroupVersion::V1);
+ }
+
+ #[test]
+ fn test_cgroup_mount() {
+ let cases = &[
+ ("/", "/sys/fs/cgroup/cpu", "/", Some("/sys/fs/cgroup/cpu")),
+ (
+ "/docker/01abcd",
+ "/sys/fs/cgroup/cpu",
+ "/docker/01abcd",
+ Some("/sys/fs/cgroup/cpu"),
+ ),
+ (
+ "/docker/01abcd",
+ "/sys/fs/cgroup/cpu",
+ "/docker/01abcd/",
+ Some("/sys/fs/cgroup/cpu"),
+ ),
+ (
+ "/docker/01abcd",
+ "/sys/fs/cgroup/cpu",
+ "/docker/01abcd/large",
+ Some("/sys/fs/cgroup/cpu/large"),
+ ),
+ // fails
+ ("/docker/01abcd", "/sys/fs/cgroup/cpu", "/", None),
+ ("/docker/01abcd", "/sys/fs/cgroup/cpu", "/docker", None),
+ ("/docker/01abcd", "/sys/fs/cgroup/cpu", "/elsewhere", None),
+ (
+ "/docker/01abcd",
+ "/sys/fs/cgroup/cpu",
+ "/docker/01abcd-other-dir",
+ None,
+ ),
+ ];
+
+ for &(root, mount_point, subsys, expected) in cases.iter() {
+ let mnt_info = MountInfo {
+ version: CgroupVersion::V1,
+ root: root.into(),
+ mount_point: mount_point.into(),
+ };
+ let subsys = Subsys {
+ version: CgroupVersion::V1,
+ base: subsys.into(),
+ };
+
+ let actual = Cgroup::translate(mnt_info, subsys).map(|c| c.base);
+ let expected = expected.map(PathBuf::from);
+ assert_eq!(actual, expected);
+ }
+ }
+
+ #[test]
+ fn test_cgroup_cpu_quota() {
+ let cgroup = Cgroup::new(CgroupVersion::V2, join!(FIXTURES_CGROUPS, "good"));
+ assert_eq!(cgroup.cpu_quota(), Some(6));
+ }
+
+ #[test]
+ fn test_cgroup_cpu_quota_divide_by_zero() {
+ let cgroup = Cgroup::new(CgroupVersion::V2, join!(FIXTURES_CGROUPS, "zero-period"));
+ let period = cgroup.max().map(|max| max.1);
+
+ assert_eq!(period, Some(0));
+ assert_eq!(cgroup.cpu_quota(), None);
+ }
+
+ #[test]
+ fn test_cgroup_cpu_quota_ceil() {
+ let cgroup = Cgroup::new(CgroupVersion::V2, join!(FIXTURES_CGROUPS, "ceil"));
+ assert_eq!(cgroup.cpu_quota(), Some(2));
+ }
+ }
+}
projects / platform / upstream / rust-num_cpus.git / commitdiff