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Add assembly memset for fast filling zeros

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This commit is contained in:
Shaowei Song
2024-08-28 09:38:43 +00:00
committed by Tate, Hongliang Tian
parent a72c7dadf3
commit aae9fdb331
6 changed files with 80 additions and 9 deletions
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6
kernel/src/device/zero.rs
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@ -20,11 +20,7 @@ impl Device for Zero {
impl FileIo for Zero {
fn read(&self, writer: &mut VmWriter) -> Result<usize> {
// TODO: Use more efficient way when need to read a bunch of zeros once.
let read_len = writer.avail();
for _ in 0..read_len {
writer.write_val(&0u8)?;
}
let read_len = writer.fill_zeros(writer.avail())?;
Ok(read_len)
}