Enum UtilizationUnavailable 

#[non_exhaustive]
pub enum UtilizationUnavailable {
    RuntimeNotLinked,
    RuntimeReadsNoCounter,
    NoCard,
    NoCounterForCard(Option<PciVendor>),
    CardAddressNotReported,
    DriverLibraryNotFound(String),
    NoPreviousReading,
    QueryFailed(String),
}

Why a device’s utilization could not be read.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

RuntimeNotLinked

This build does not link the device’s runtime, which is what says which card the device is.

RuntimeReadsNoCounter

The device’s runtime reads no counter for its devices.

NoCard

The runtime reports no card behind the device: a software adapter.

NoCounterForCard(Option<PciVendor>)

This platform keeps no counter read here for a card of this vendor, or of no vendor the runtime named.

CardAddressNotReported

The card’s counter is found by an address the runtime did not report: the PCI address on Linux, the LUID on Windows, and on macOS the registry entry id, where the machine has more than one GPU.

DriverLibraryNotFound(String)

The driver’s library would not load: no driver installed, or none on the loader’s path. Holds the loader’s message.

NoPreviousReading

The counter measures the time between two readings, and this was the device’s first, or the first since the counter restarted.

QueryFailed(String)

The counter was reached and gave no reading. Holds the driver’s, the platform’s or the filesystem’s message.

Trait Implementations

impl Clone for UtilizationUnavailable

fn clone(&self) -> UtilizationUnavailable

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for UtilizationUnavailable

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

Formats the value using the given formatter.

impl Display for UtilizationUnavailable

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

Formats the value using the given formatter.

impl Eq for UtilizationUnavailable

impl Error for UtilizationUnavailable

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for UtilizationUnavailable

fn eq(&self, other: &UtilizationUnavailable) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for UtilizationUnavailable