Struct Cache 

pub struct Cache {
    pub which: CacheId,
    pub operation: CacheOp,
    pub result: CacheResult,
}

A cache event.

A cache event has three identifying characteristics:

• which cache to observe (which)

• what sort of request it’s handling (operation)

• whether we want to count all cache accesses, or just misses (result).

For example, to measure the L1 data cache’s miss rate:

// A `Cache` value representing L1 data cache read accesses.
const ACCESS: Cache = Cache {
    which: WhichCache::L1D,
    operation: CacheOp::READ,
    result: CacheResult::ACCESS,
};

// A `Cache` value representing L1 data cache read misses.
const MISS: Cache = Cache {
    result: CacheResult::MISS,
    ..ACCESS
};

// Construct a `Group` containing the two new counters, from which we
// can get counts over matching periods of time.
let mut group = Group::new()?;
let access_counter = group.add(&Builder::new(ACCESS))?;
let miss_counter = group.add(&Builder::new(MISS))?;

Fields

which: CacheId

Which cache is being monitored? (data, instruction, …)

operation: CacheOp

What operation is being monitored? (read, write, etc.)

result: CacheResult

All accesses, or just misses?

Trait Implementations

impl Clone for Cache

fn clone(&self) -> Cache

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Cache

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

Formats the value using the given formatter.

impl Event for Cache

fn update_attrs(self, attr: &mut perf_event_attr)

Update the perf_event_attr struct so that it will record the requested event.

fn update_attrs_with_data( self, attr: &mut perf_event_attr, ) -> Option<Arc<dyn EventData>>

Update the perf_event_attr struct so that it will record the requested event.

impl PartialEq for Cache

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Cache

impl StructuralPartialEq for Cache