Besides, this PR also tried use read_at and write_at to avoid locking a fd. But currently tokio doesn't support read_at or write_at for now. So, it's needed to use tokio::task::spawn_blocking with std::fs::File and communicate with tokio::sync::oneshot. But after benching the approach, it's found that the jitter of the latency is extremely high. So I abandon the implementation. You can found them in the commit logs if you are interested.
What changes were proposed in this pull request?
As titled.
Besides, this PR also tried use
read_atandwrite_atto avoid locking a fd. But currentlytokiodoesn't supportread_atorwrite_atfor now. So, it's needed to usetokio::task::spawn_blockingwithstd::fs::Fileand communicate withtokio::sync::oneshot. But after benching the approach, it's found that the jitter of the latency is extremely high. So I abandon the implementation. You can found them in the commit logs if you are interested.Which issues is this PR related to?
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