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use crate::collective::CollectiveHandle;
use crate::compression::Compressor;
use std::sync::Arc;
use super::NexarClient;
/// Wrapper to send a raw `*mut u8` across thread boundaries.
///
/// # Safety
/// The caller must ensure the pointer remains valid and exclusively
/// borrowed for the lifetime of the future that uses it.
struct SendMutSlice {
ptr: *mut u8,
len: usize,
}
unsafe impl Send for SendMutSlice {}
impl SendMutSlice {
/// Reconstruct the mutable slice.
///
/// # Safety
/// The pointer must still be valid and exclusively borrowed.
unsafe fn as_mut_slice(&mut self) -> &mut [u8] {
unsafe { std::slice::from_raw_parts_mut(self.ptr, self.len) }
}
}
impl NexarClient {
/// Non-blocking allreduce. Returns a handle that can be awaited later.
///
/// # Safety
/// `ptr` must remain valid until the handle is awaited.
pub unsafe fn all_reduce_nb(
self: &Arc<Self>,
ptr: u64,
count: usize,
dtype: crate::types::DataType,
op: crate::types::ReduceOp,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::ring_allreduce(&client, ptr, count, dtype, op, Some(tag)).await
}
})
}
/// Non-blocking broadcast.
///
/// # Safety
/// `ptr` must remain valid until the handle is awaited.
pub unsafe fn broadcast_nb(
self: &Arc<Self>,
ptr: u64,
count: usize,
dtype: crate::types::DataType,
root: crate::types::Rank,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::tree_broadcast(&client, ptr, count, dtype, root, Some(tag)).await
}
})
}
/// Non-blocking allgather.
///
/// # Safety
/// Both pointers must remain valid until the handle is awaited.
pub unsafe fn all_gather_nb(
self: &Arc<Self>,
send_ptr: u64,
recv_ptr: u64,
count: usize,
dtype: crate::types::DataType,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::ring_allgather(
&client,
send_ptr,
recv_ptr,
count,
dtype,
Some(tag),
)
.await
}
})
}
/// Non-blocking reduce-scatter.
///
/// # Safety
/// Both pointers must remain valid until the handle is awaited.
pub unsafe fn reduce_scatter_nb(
self: &Arc<Self>,
send_ptr: u64,
recv_ptr: u64,
count: usize,
dtype: crate::types::DataType,
op: crate::types::ReduceOp,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::ring_reduce_scatter(
&client,
send_ptr,
recv_ptr,
count,
dtype,
op,
Some(tag),
)
.await
}
})
}
/// Non-blocking reduce.
///
/// # Safety
/// `ptr` must remain valid until the handle is awaited.
pub unsafe fn reduce_nb(
self: &Arc<Self>,
ptr: u64,
count: usize,
dtype: crate::types::DataType,
op: crate::types::ReduceOp,
root: crate::types::Rank,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::tree_reduce(&client, ptr, count, dtype, op, root, Some(tag))
.await
}
})
}
/// Non-blocking all-to-all.
///
/// # Safety
/// Both pointers must remain valid until the handle is awaited.
pub unsafe fn all_to_all_nb(
self: &Arc<Self>,
send_ptr: u64,
recv_ptr: u64,
count: usize,
dtype: crate::types::DataType,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::alltoall(&client, send_ptr, recv_ptr, count, dtype, Some(tag))
.await
}
})
}
/// Non-blocking gather.
///
/// # Safety
/// Both pointers must remain valid until the handle is awaited.
pub unsafe fn gather_nb(
self: &Arc<Self>,
send_ptr: u64,
recv_ptr: u64,
count: usize,
dtype: crate::types::DataType,
root: crate::types::Rank,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::gather(
&client,
send_ptr,
recv_ptr,
count,
dtype,
root,
Some(tag),
)
.await
}
})
}
/// Non-blocking scatter.
///
/// # Safety
/// Both pointers must remain valid until the handle is awaited.
pub unsafe fn scatter_nb(
self: &Arc<Self>,
send_ptr: u64,
recv_ptr: u64,
count: usize,
dtype: crate::types::DataType,
root: crate::types::Rank,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::scatter(
&client,
send_ptr,
recv_ptr,
count,
dtype,
root,
Some(tag),
)
.await
}
})
}
/// Non-blocking exclusive scan.
///
/// # Safety
/// `ptr` must remain valid until the handle is awaited.
pub unsafe fn exclusive_scan_nb(
self: &Arc<Self>,
ptr: u64,
count: usize,
dtype: crate::types::DataType,
op: crate::types::ReduceOp,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::exclusive_scan(&client, ptr, count, dtype, op, Some(tag)).await
}
})
}
/// Non-blocking inclusive scan.
///
/// # Safety
/// `ptr` must remain valid until the handle is awaited.
pub unsafe fn scan_nb(
self: &Arc<Self>,
ptr: u64,
count: usize,
dtype: crate::types::DataType,
op: crate::types::ReduceOp,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::inclusive_scan(&client, ptr, count, dtype, op, Some(tag)).await
}
})
}
/// Non-blocking barrier.
pub fn barrier_nb(self: &Arc<Self>) -> CollectiveHandle {
let client = Arc::clone(self);
CollectiveHandle::spawn(async move {
crate::collective::barrier(&client, client.config.barrier_timeout).await
})
}
/// Non-blocking bucketed allreduce.
///
/// # Safety
/// All entry pointers must remain valid until the handle is awaited.
pub unsafe fn all_reduce_bucketed_nb(
self: &Arc<Self>,
entries: Vec<(u64, usize)>,
dtype: crate::types::DataType,
op: crate::types::ReduceOp,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::allreduce_bucketed(&client, &entries, dtype, op, Some(tag)).await
}
})
}
/// Non-blocking RS+AG allreduce.
///
/// # Safety
/// `ptr` must remain valid until the handle is awaited.
pub unsafe fn all_reduce_rs_ag_nb(
self: &Arc<Self>,
ptr: u64,
count: usize,
dtype: crate::types::DataType,
op: crate::types::ReduceOp,
) -> CollectiveHandle {
let client = Arc::clone(self);
let tag = client.next_collective_tag();
CollectiveHandle::spawn(async move {
unsafe {
crate::collective::rs_ag_allreduce(&client, ptr, count, dtype, op, Some(tag)).await
}
})
}
/// Non-blocking compressed allreduce.
///
/// # Safety
/// - `ptr` must remain valid until the handle is awaited.
/// - `residual` must remain valid and exclusively borrowed until the handle is awaited.
#[allow(clippy::too_many_arguments)]
pub unsafe fn all_reduce_compressed_nb(
self: &Arc<Self>,
ptr: u64,
count: usize,
dtype: crate::types::DataType,
op: crate::types::ReduceOp,
compressor: Arc<dyn Compressor>,
residual: *mut u8,
residual_len: usize,
) -> CollectiveHandle {
let tag = self.next_collective_tag();
let client = Arc::clone(self);
let mut residual_buf = SendMutSlice {
ptr: residual,
len: residual_len,
};
CollectiveHandle::spawn(async move {
// SAFETY: caller guarantees residual is valid and exclusively borrowed.
let residual_slice = unsafe { residual_buf.as_mut_slice() };
unsafe {
crate::collective::ring_allreduce_compressed(
&client,
ptr,
count,
dtype,
op,
compressor.as_ref(),
residual_slice,
Some(tag),
)
.await
}
})
}
}