Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

22 files changed, 1385 insertions, 0 deletions

diff --git a/vendor/num_cpus/.cargo-checksum.json b/vendor/num_cpus/.cargo-checksum.json
new file mode 100644
index 000000000..e101b17c3
--- /dev/null
+++ b/vendor/num_cpus/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"CHANGELOG.md":"1b01434272c7e464f187eedc95522d9f5668f7f423459572fd33cd8eb5c4c5cf","CONTRIBUTING.md":"2390961aab1bba026135338da1216b6cc828dfaeed9357d9c155c55a252d3efb","Cargo.lock":"dabfb21d5ed9cefaf28e1fcbcaf253de08807ca3be33d0de4b06bb7a377d7b60","Cargo.toml":"885f8ecc8197bec06e151fde7769dc7c267d2f25a4b573240463e8a40a5be298","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"0593d22d122d4bfec6407115e3907546312976f75473417aaa4c57ecd2095ae6","README.md":"7760d315d3efd2306affa4c8e4dcdb3a245ae30b3c9cfb9cffed2f1116c86362","ci/cgroups/Dockerfile":"567f00918a6422b363e2c21e57bd47cef9dcc03d0ab109c9605e052f83af7e89","examples/values.rs":"46c833324b7339d359054c4f8e8284259e860df206c552c63b5893ade59c16a6","fixtures/cgroups/cgroups/ceil/cpu.cfs_period_us":"d2ace393dc9388863d75d8de140df516d7ffe4aa7ed2f9a545aa71c9930d6638","fixtures/cgroups/cgroups/ceil/cpu.cfs_quota_us":"7ccd86cde0b22ffc2318f2509726d2a13053f6973e96dc5ca6965a56497e485e","fixtures/cgroups/cgroups/good/cpu.cfs_period_us":"d2ace393dc9388863d75d8de140df516d7ffe4aa7ed2f9a545aa71c9930d6638","fixtures/cgroups/cgroups/good/cpu.cfs_quota_us":"cdc3397c35d915e5fe61f8d2bdedcae00a225d55cc6b090580cde1b71c63463b","fixtures/cgroups/cgroups/zero-period/cpu.cfs_period_us":"74d01a0c051c963d9a9b8ab9dbeab1723f0ad8534ea9fa6a942f358d7fa011b4","fixtures/cgroups/cgroups/zero-period/cpu.cfs_quota_us":"1e6ffd8a95fab538ddd645a767e8cc505722d5c8aaf008969f2ed8ab753ff61e","fixtures/cgroups/proc/cgroups/cgroup":"6812299a4409bfd831ed751fdbbfdd9c5749f69acd7b14c5b0a704271a1f74c6","fixtures/cgroups/proc/cgroups/mountinfo":"3187b0b1c0fa192790abced7d435190e8979059186055688e4c3c2ca013398c6","fixtures/cgroups/proc/cgroups/mountinfo_multi_opt":"d1e397752bc5c4558a3230ad847e89c6885362eab68a53b08dbf219de2e0138a","fixtures/cgroups/proc/cgroups/mountinfo_zero_opt":"91b03b270c76460bc19225aa4b743f893c7d32173e9609ef77e5a04814ab81ff","src/lib.rs":"81fc237964757a53689db848b1df4fed75bbd6a6e7a9063b6bb008161f8c22af","src/linux.rs":"a453e1056c130beaa7e2338222d04b5d3786f6325f5ca314ce9f4130079add2f"},"package":"19e64526ebdee182341572e50e9ad03965aa510cd94427a4549448f285e957a1"}
\ No newline at end of file
diff --git a/vendor/num_cpus/CHANGELOG.md b/vendor/num_cpus/CHANGELOG.md
new file mode 100644
index 000000000..5496ace25
--- /dev/null
+++ b/vendor/num_cpus/CHANGELOG.md
@@ -0,0 +1,137 @@
+## 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
diff --git a/vendor/num_cpus/CONTRIBUTING.md b/vendor/num_cpus/CONTRIBUTING.md
new file mode 100644
index 000000000..5685b08c6
--- /dev/null
+++ b/vendor/num_cpus/CONTRIBUTING.md
@@ -0,0 +1,16 @@
+# 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.
diff --git a/vendor/num_cpus/Cargo.lock b/vendor/num_cpus/Cargo.lock
new file mode 100644
index 000000000..93137c3ea
--- /dev/null
+++ b/vendor/num_cpus/Cargo.lock
@@ -0,0 +1,26 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "307c3c9f937f38e3534b1d6447ecf090cafcc9744e4a6360e8b037b2cf5af120"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.65"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a31a0627fdf1f6a39ec0dd577e101440b7db22672c0901fe00a9a6fbb5c24e8"
+
+[[package]]
+name = "num_cpus"
+version = "1.13.1"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
diff --git a/vendor/num_cpus/Cargo.toml b/vendor/num_cpus/Cargo.toml
new file mode 100644
index 000000000..f708cc878
--- /dev/null
+++ b/vendor/num_cpus/Cargo.toml
@@ -0,0 +1,26 @@
+# 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 = "1.13.1"
+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 = "0.1.3"
+[target."cfg(not(windows))".dependencies.libc]
+version = "0.2.26"
diff --git a/vendor/num_cpus/LICENSE-APACHE b/vendor/num_cpus/LICENSE-APACHE
new file mode 100644
index 000000000..16fe87b06
--- /dev/null
+++ b/vendor/num_cpus/LICENSE-APACHE
@@ -0,0 +1,201 @@
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diff --git a/vendor/num_cpus/LICENSE-MIT b/vendor/num_cpus/LICENSE-MIT
new file mode 100644
index 000000000..8e91dc998
--- /dev/null
+++ b/vendor/num_cpus/LICENSE-MIT
@@ -0,0 +1,20 @@
+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
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+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.
+
diff --git a/vendor/num_cpus/README.md b/vendor/num_cpus/README.md
new file mode 100644
index 000000000..1de7d8ec6
--- /dev/null
+++ b/vendor/num_cpus/README.md
@@ -0,0 +1,28 @@
+# num_cpus
+
+[![crates.io](https://img.shields.io/crates/v/num_cpus.svg)](https://crates.io/crates/num_cpus)
+[![Travis CI Status](https://travis-ci.org/seanmonstar/num_cpus.svg?branch=master)](https://travis-ci.org/seanmonstar/num_cpus)
+[![AppVeyor status](https://ci.appveyor.com/api/projects/status/qn8t6grhko5jwno6?svg=true)](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();
+```
diff --git a/vendor/num_cpus/ci/cgroups/Dockerfile b/vendor/num_cpus/ci/cgroups/Dockerfile
new file mode 100644
index 000000000..7636a477b
--- /dev/null
+++ b/vendor/num_cpus/ci/cgroups/Dockerfile
@@ -0,0 +1,9 @@
+FROM rust:latest
+
+WORKDIR /usr/num_cpus
+
+COPY . .
+
+RUN cargo build
+
+CMD [ "cargo", "test", "--lib" ]
diff --git a/vendor/num_cpus/examples/values.rs b/vendor/num_cpus/examples/values.rs
new file mode 100644
index 000000000..041cfaf1e
--- /dev/null
+++ b/vendor/num_cpus/examples/values.rs
@@ -0,0 +1,6 @@
+extern crate num_cpus;
+
+fn main() {
+    println!("Logical CPUs: {}", num_cpus::get());
+    println!("Physical CPUs: {}", num_cpus::get_physical());
+}
diff --git a/vendor/num_cpus/fixtures/cgroups/cgroups/ceil/cpu.cfs_period_us b/vendor/num_cpus/fixtures/cgroups/cgroups/ceil/cpu.cfs_period_us
new file mode 100644
index 000000000..022f514ba
--- /dev/null
+++ b/vendor/num_cpus/fixtures/cgroups/cgroups/ceil/cpu.cfs_period_us
@@ -0,0 +1,2 @@
+100000
+
diff --git a/vendor/num_cpus/fixtures/cgroups/cgroups/ceil/cpu.cfs_quota_us b/vendor/num_cpus/fixtures/cgroups/cgroups/ceil/cpu.cfs_quota_us
new file mode 100644
index 000000000..cb2bf3ec7
--- /dev/null
+++ b/vendor/num_cpus/fixtures/cgroups/cgroups/ceil/cpu.cfs_quota_us
@@ -0,0 +1,2 @@
+150000
+
diff --git a/vendor/num_cpus/fixtures/cgroups/cgroups/good/cpu.cfs_period_us b/vendor/num_cpus/fixtures/cgroups/cgroups/good/cpu.cfs_period_us
new file mode 100644
index 000000000..022f514ba
--- /dev/null
+++ b/vendor/num_cpus/fixtures/cgroups/cgroups/good/cpu.cfs_period_us
@@ -0,0 +1,2 @@
+100000
+
diff --git a/vendor/num_cpus/fixtures/cgroups/cgroups/good/cpu.cfs_quota_us b/vendor/num_cpus/fixtures/cgroups/cgroups/good/cpu.cfs_quota_us
new file mode 100644
index 000000000..16e37df1d
--- /dev/null
+++ b/vendor/num_cpus/fixtures/cgroups/cgroups/good/cpu.cfs_quota_us
@@ -0,0 +1,2 @@
+600000
+
diff --git a/vendor/num_cpus/fixtures/cgroups/cgroups/zero-period/cpu.cfs_period_us b/vendor/num_cpus/fixtures/cgroups/cgroups/zero-period/cpu.cfs_period_us
new file mode 100644
index 000000000..77ac542d4
--- /dev/null
+++ b/vendor/num_cpus/fixtures/cgroups/cgroups/zero-period/cpu.cfs_period_us
@@ -0,0 +1,2 @@
+0
+
diff --git a/vendor/num_cpus/fixtures/cgroups/cgroups/zero-period/cpu.cfs_quota_us b/vendor/num_cpus/fixtures/cgroups/cgroups/zero-period/cpu.cfs_quota_us
new file mode 100644
index 000000000..26f3b3ddf
--- /dev/null
+++ b/vendor/num_cpus/fixtures/cgroups/cgroups/zero-period/cpu.cfs_quota_us
@@ -0,0 +1 @@
+600000
diff --git a/vendor/num_cpus/fixtures/cgroups/proc/cgroups/cgroup b/vendor/num_cpus/fixtures/cgroups/proc/cgroups/cgroup
new file mode 100644
index 000000000..a47f04724
--- /dev/null
+++ b/vendor/num_cpus/fixtures/cgroups/proc/cgroups/cgroup
@@ -0,0 +1,3 @@
+12:perf_event:/
+11:cpu,cpuacct:/
+3:devices:/user.slice
diff --git a/vendor/num_cpus/fixtures/cgroups/proc/cgroups/mountinfo b/vendor/num_cpus/fixtures/cgroups/proc/cgroups/mountinfo
new file mode 100644
index 000000000..37f4e2535
--- /dev/null
+++ b/vendor/num_cpus/fixtures/cgroups/proc/cgroups/mountinfo
@@ -0,0 +1,8 @@
+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
diff --git a/vendor/num_cpus/fixtures/cgroups/proc/cgroups/mountinfo_multi_opt b/vendor/num_cpus/fixtures/cgroups/proc/cgroups/mountinfo_multi_opt
new file mode 100644
index 000000000..e03a95b42
--- /dev/null
+++ b/vendor/num_cpus/fixtures/cgroups/proc/cgroups/mountinfo_multi_opt
@@ -0,0 +1,8 @@
+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
diff --git a/vendor/num_cpus/fixtures/cgroups/proc/cgroups/mountinfo_zero_opt b/vendor/num_cpus/fixtures/cgroups/proc/cgroups/mountinfo_zero_opt
new file mode 100644
index 000000000..ad27a964f
--- /dev/null
+++ b/vendor/num_cpus/fixtures/cgroups/proc/cgroups/mountinfo_zero_opt
@@ -0,0 +1,8 @@
+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
diff --git a/vendor/num_cpus/src/lib.rs b/vendor/num_cpus/src/lib.rs
new file mode 100644
index 000000000..20474af4b
--- /dev/null
+++ b/vendor/num_cpus/src/lib.rs
@@ -0,0 +1,459 @@
+//! 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);
+        }
+    }
+}
diff --git a/vendor/num_cpus/src/linux.rs b/vendor/num_cpus/src/linux.rs
new file mode 100644
index 000000000..36f472717
--- /dev/null
+++ b/vendor/num_cpus/src/linux.rs
@@ -0,0 +1,418 @@
+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);
+
+    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));
+    let cgroup = some!(Cgroup::translate(mntinfo, subsys));
+    cgroup.cpu_quota()
+}
+
+struct Cgroup {
+    base: PathBuf,
+}
+
+struct MountInfo {
+    root: String,
+    mount_point: String,
+}
+
+struct Subsys {
+    base: String,
+}
+
+impl Cgroup {
+    fn new(dir: PathBuf) -> Cgroup {
+        Cgroup { 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(path))
+    }
+
+    fn cpu_quota(&self) -> Option<usize> {
+        let quota_us = some!(self.quota_us());
+        let period_us = some!(self.period_us());
+
+        // 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 param(&self, param: &str) -> Option<usize> {
+        let mut file = some!(File::open(self.base.join(param)).ok());
+
+        let mut buf = String::new();
+        some!(file.read_to_string(&mut buf).ok());
+
+        buf.trim().parse().ok()
+    }
+}
+
+impl MountInfo {
+    fn load_cpu<P: AsRef<Path>>(proc_path: P) -> 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)
+            .next()
+    }
+
+    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
+        if fields.next() != Some("cgroup") {
+            return None;
+        }
+
+        // 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 {
+            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)
+            .next()
+    }
+
+    fn parse_line(line: String) -> Option<Subsys> {
+        // Example format:
+        // 11:cpu,cpuacct:/
+        let mut fields = line.split(':');
+
+        let sub_systems = some!(fields.nth(1));
+
+        if !sub_systems.split(',').any(|sub| sub == "cpu") {
+            return None;
+        }
+
+        fields.next().map(|path| Subsys {
+            base: path.to_owned(),
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{Cgroup, 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).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).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).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, "/");
+    }
+
+    #[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 {
+                root: root.into(),
+                mount_point: mount_point.into(),
+            };
+            let subsys = Subsys {
+                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(join!(FIXTURES_CGROUPS, "good"));
+        assert_eq!(cgroup.cpu_quota(), Some(6));
+    }
+
+    #[test]
+    fn test_cgroup_cpu_quota_divide_by_zero() {
+        let cgroup = Cgroup::new(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(join!(FIXTURES_CGROUPS, "ceil"));
+        assert_eq!(cgroup.cpu_quota(), Some(2));
+    }
+}