1 unstable release
0.1.0 | Sep 5, 2023 |
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#450 in Memory management
11KB
190 lines
hugepage-rs
hugepage-rs wrapped allocator for linux hugepage.
Usage
HugePage Allocator
Hugepage allocator provides two interfaces for operation, hugepage_rs::alloc and hugepage_rs::dealloc, allocate and free hugepage memory.
The hugepage_rs::alloc() function allocates size bytes and returns a pointer to the allocated memory. The memory is not initialized. returns std::ptr::null_mut() if allocation fails, otherwise returns a pointer.
use hugepage_rs;
use std::alloc::Layout;
use std::{mem, ptr};
fn main() {
let layout = Layout::array::<char>(2048).unwrap();
let dst = hugepage_rs::alloc(layout);
let src = String::from("hello");
let len = src.len();
unsafe {
ptr::copy_nonoverlapping(src.as_ptr(), dst, len);
let s = String::from_raw_parts(dst, len, len);
assert_eq!(s, src);
mem::forget(s);
}
hugepage_rs::dealloc(dst, layout);
}
HugePage Boxed
Simple Box implementation with ownership, data on hugepage allocated memory, released directly after going out of scope, memory allocator using hugepage allocator.
use hugepage_rs;
fn main() {
let mut v = hugepage_rs::Box::new(5);
*v += 42;
assert_eq!(*v, 47);
}
Notes
- System need to enable hugepage.
Reference
Huge pages part 1 (Introduction)
Huge pages part 3: Administration
Huge pages part 4: benchmarking with huge pages
Huge pages part 5: A deeper look at TLBs and costs
Dependencies
~52KB