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update frame-allocation algorithm to accelerate stream table construction #98

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update frame-allocation algorithm to accelerate stream table construction #98

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9b2fd9b
Update frame allocation algorithm to accelerate stream table construc…
ZhongkaiXu Jan 15, 2025
ccbf30f
Merge branch 'dev' of https://github.com/ZhongkaiXu/hvisor into dev
ZhongkaiXu Jan 15, 2025
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33 changes: 22 additions & 11 deletions src/memory/frame.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -128,22 +128,33 @@ impl Frame {
}

/// allocate contigugous frames, and you can specify the alignment, set the lower `align_log2` bits to 0.
pub fn new_contiguous_with_base(
frame_count: usize,
align_log2: usize,
) -> HvResult<Self> {
pub fn new_contiguous_with_base(frame_count: usize, align_log2: usize) -> HvResult<Self> {
let align_mask = (1 << align_log2) - 1;
// Create a vector to keep track of attempted frames
let mut attempted_frames = Vec::new();
loop{
if let Ok(frame) = Frame::new_contiguous(frame_count, 0){
if frame.start_paddr() & ((1 << align_log2) - 1) == 0{
info!("new contiguous success!!! start_paddr:0x{:x}",frame.start_paddr());
loop {
if let Ok(frame) = Frame::new_contiguous(frame_count, 0) {
if frame.start_paddr() & align_mask == 0 {
info!(
"new contiguous success!!! start_paddr:0x{:x}",
frame.start_paddr()
);
return Ok(frame);
}else{
} else {
let start_paddr = frame.start_paddr();
let next_aligned_addr = (start_paddr + align_mask) & !align_mask;
let temp_frame_count = (next_aligned_addr - start_paddr) / PAGE_SIZE;
drop(frame);
attempted_frames.push(Frame::new_zero());
attempted_frames.push(Frame::new_contiguous(temp_frame_count, 0));
if let Ok(frame) = Frame::new_contiguous(frame_count, 0) {
info!(
"new contiguous success!!! start_paddr:0x{:x}",
frame.start_paddr()
);
return Ok(frame);
}
}
}else{
} else {
return Err(hv_err!(ENOMEM));
}
}
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