Struct tokio::runtime::RuntimeMetrics
source · pub struct RuntimeMetrics { /* private fields */ }
Expand description
Handle to the runtime’s metrics.
This handle is internally reference-counted and can be freely cloned. A
RuntimeMetrics
handle is obtained using the Runtime::metrics
method.
Implementations§
source§impl RuntimeMetrics
impl RuntimeMetrics
sourcepub fn num_workers(&self) -> usize
pub fn num_workers(&self) -> usize
Returns the number of worker threads used by the runtime.
The number of workers is set by configuring worker_threads
on
runtime::Builder
. When using the current_thread
runtime, the return
value is always 1
.
§Examples
use tokio::runtime::Handle;
#[tokio::main]
async fn main() {
let metrics = Handle::current().metrics();
let n = metrics.num_workers();
println!("Runtime is using {} workers", n);
}
sourcepub fn num_alive_tasks(&self) -> usize
pub fn num_alive_tasks(&self) -> usize
Returns the current number of alive tasks in the runtime.
This counter increases when a task is spawned and decreases when a task exits.
§Examples
use tokio::runtime::Handle;
#[tokio::main]
async fn main() {
let metrics = Handle::current().metrics();
let n = metrics.num_alive_tasks();
println!("Runtime has {} alive tasks", n);
}
Trait Implementations§
source§impl Clone for RuntimeMetrics
impl Clone for RuntimeMetrics
source§fn clone(&self) -> RuntimeMetrics
fn clone(&self) -> RuntimeMetrics
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moreAuto Trait Implementations§
impl Freeze for RuntimeMetrics
impl !RefUnwindSafe for RuntimeMetrics
impl Send for RuntimeMetrics
impl Sync for RuntimeMetrics
impl Unpin for RuntimeMetrics
impl !UnwindSafe for RuntimeMetrics
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)