Enum context_allocator::mmap::HugePageSize

#[repr(i32)]
pub enum HugePageSize {
    None,
    Default,
    _64Kb,
    _512Kb,
    _1Mb,
    _2Mb,
    _8Mb,
    _16Mb,
    _32Mb,
    _256Mb,
    _512Mb,
    _1Gb,
    _2Gb,
    _16Gb,
}

Request that an allocation uses huge pages.

The allocation being requested has to be aligned to the size requested, viz it is best to only make allocations that use the configured huge page size.

On x86-64, this should be 2Mb or 1Gb.

Currently such requests assume that transparent huge pages are in effect.

On operating systems other than Android and Linux, huge page size has no effect.

Variants

None

Regular, non-huge-page.

Default

Equivalent to MAP_HUGETLB.

_64Kb

Equivalent to MAP_HUGETLB | MAP_HUGE_64KB.

Suitable for ?

_512Kb

Equivalent to MAP_HUGETLB | MAP_HUGE_512KB.

Suitable for ?

_1Mb

Equivalent to MAP_HUGETLB | MAP_HUGE_1Mb.

Suitable for ?

_2Mb

Equivalent to MAP_HUGETLB | MAP_HUGE_2MB.

Suitable for x86-64.

_8Mb

Equivalent to MAP_HUGETLB | MAP_HUGE_8MB.

Suitable for ?

_16Mb

Equivalent to MAP_HUGETLB | MAP_HUGE_16MB.

Suitable for ?

_32Mb

Equivalent to MAP_HUGETLB | MAP_HUGE_32MB.

Suitable for ?

_256Mb

Equivalent to MAP_HUGETLB | MAP_HUGE_256MB.

Suitable for ?

_512Mb

Equivalent to MAP_HUGETLB | MAP_HUGE_512MB.

Suitable for ?

_1Gb

Equivalent to MAP_HUGETLB | MAP_HUGE_1GB.

Suitable for x86-64.

_2Gb

Equivalent to MAP_HUGETLB | MAP_HUGE_2GB.

Suitable for ?

_16Gb

Equivalent to MAP_HUGETLB | MAP_HUGE_16GB.

Suitable for PowerPC.

Trait Implementations

impl Eq for HugePageSize

impl Copy for HugePageSize

impl PartialOrd<HugePageSize> for HugePageSize

fn partial_cmp(&self, other: &HugePageSize) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use]

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

This method tests less than (for self and other) and is used by the < operator.

#[must_use]

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use]

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

This method tests greater than (for self and other) and is used by the > operator.

#[must_use]

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl PartialEq<HugePageSize> for HugePageSize

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

This method tests for self and other values to be equal, and is used by ==.

#[must_use]

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

This method tests for !=.

impl Clone for HugePageSize

fn clone(&self) -> HugePageSize

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for HugePageSize

fn default() -> Self

Returns the "default value" for a type.

impl Ord for HugePageSize

fn cmp(&self, other: &HugePageSize) -> Ordering

This method returns an Ordering between self and other.

default fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

default fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

default fn clamp(self, min: Self, max: Self) -> Self

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

Restrict a value to a certain interval.

impl Debug for HugePageSize

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

Formats the value using the given formatter.

impl Hash for HugePageSize

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

Feeds this value into the given [Hasher].

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

Feeds a slice of this type into the given [Hasher].