Enum MemoryAccess 

pub enum MemoryAccess {
    Copy,
    Read,
    Write,
}

Which directions of traffic a memory probe issues.

Variants

Copy

Reads every byte and writes it back out. The ceiling for a kernel that both loads and stores.

Read

Reads only, storing nothing. The ceiling for a kernel that streams data it does not write back — a weight stream, a reduction, a gather. Such a kernel legitimately exceeds Copy, because half of the copy’s traffic is a direction it never uses.

Write

Writes only, reading nothing at the software level. The ceiling for a kernel that streams stores it never reads back: an RNG fill, a memset, a broadcast. Ordinary stores still carry read-for-ownership traffic on cache-coherent hardware, and this probe’s stores do too, which is what makes it the honest ceiling for a kernel that uses ordinary stores rather than a non-temporal one.

Implementations

impl MemoryAccess

pub const fn buffers(&self) -> u64

How many buffers of equal size one pass touches: two for a copy (one in, one out), one for a read or a write.

pub const fn default_working_set(&self) -> u64

The working set of the single-size probe for this access, in bytes moved per pass: DEFAULT_BUFFER_BYTES per buffer touched.

Trait Implementations

impl Clone for MemoryAccess

fn clone(&self) -> MemoryAccess

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MemoryAccess

impl Debug for MemoryAccess

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MemoryAccess

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for MemoryAccess

impl Hash for MemoryAccess

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for MemoryAccess

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for MemoryAccess

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MemoryAccess