Struct heph::rt::Setup

pub struct Setup { /* fields omitted */ }

Setup a Runtime.

This type implements a builder pattern to build a Runtime. It is created via Runtime::setup, for examples and usage see rt module.

Implementations

impl Setup

pub fn with_name(self, name: String) -> Setup

Set the name of the application.

If the name is not set when the runtime is build the name of the binary called will be used.

pub fn name(&self) -> Option<&str>

Returns the application name, if set using Setup::with_name.

pub fn num_threads(self, n: usize) -> Self

Set the number of worker threads to use, defaults to one.

Most applications would want to use Setup::use_all_cores which sets the number of threads equal to the number of CPU cores.

pub fn use_all_cores(self) -> Self

Set the number of worker threads equal to the number of CPU cores.

This uses thread::available_concurrency, please read its documentation for a number of caveats and platform-specific behaviour.

pub const fn get_threads(&self) -> usize

Returns the number of worker threads to use.

See Setup::num_threads.

pub const fn auto_cpu_affinity(self) -> Self

Automatically set CPU affinity.

This uses pthread_setaffinity_np(3) to set the CPU affinity for each worker thread to there own CPU core.

Thread-local workers creating sockets, such as UdpSocket or TcpStream, will use SO_INCOMING_CPU to set the CPU affinity to the same value as the worker’s affinity.

Notes

The is mostly useful when using Setup::use_all_cores to create a single worker thread per CPU core.

This is currently only implementated on Linux.

pub fn enable_tracing<P: AsRef<Path>>(&mut self, path: P) -> Result<(), Error>

Generate a trace of the runtime, writing it to the file specified by path.

See the trace module for more information.

Returns an error if a file at path already exists or can’t create the file.

pub fn build(self) -> Result<Runtime, Error>

Build the runtime.

This will spawn a number of worker threads (see Setup::num_threads) to run all the actors.

Trait Implementations

impl Debug for Setup

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.