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Merged
ispobock merged 1 commit into from
Jul 25, 2025
Merged

breakdown kernel update #8334

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114 changes: 42 additions & 72 deletions sgl-kernel/python/sgl_kernel/kvcacheio.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,30 +10,21 @@ def transfer_kv_per_layer(
dst_v: torch.Tensor,
src_indices: torch.Tensor,
dst_indices: torch.Tensor,
io_backend: str,
page_size: int,
item_size: int,
Comment thread
xiezhq-hermann marked this conversation as resolved.
block_quota: int = 2,
num_warps_per_block: int = 32,
):
if io_backend == "kernel":
torch.ops.sgl_kernel.transfer_kv_per_layer(
src_k,
dst_k,
src_v,
dst_v,
src_indices,
dst_indices,
item_size * src_k.element_size(), # todo, hot fix for compatibility
block_quota,
num_warps_per_block,
)
elif io_backend == "direct":
torch.ops.sgl_kernel.transfer_kv_direct(
[src_k, src_v], [dst_k, dst_v], src_indices, dst_indices, page_size
)
else:
raise ValueError(f"Unsupported io backend")
torch.ops.sgl_kernel.transfer_kv_per_layer(
src_k,
dst_k,
src_v,
dst_v,
src_indices,
dst_indices,
item_size,
block_quota,
num_warps_per_block,
)


def transfer_kv_per_layer_pf_lf(
Expand Down Expand Up @@ -69,29 +60,23 @@ def transfer_kv_all_layer(
dst_v_layers: torch.Tensor,
src_indices: torch.Tensor,
dst_indices: torch.Tensor,
io_backend: str,
item_size: int,
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xiezhq-hermann marked this conversation as resolved.
num_layers: int,
block_quota: int = 2,
num_warps_per_block: int = 32,
):
if io_backend == "kernel":
torch.ops.sgl_kernel.transfer_kv_all_layer(
src_k_layers,
dst_k_layers,
src_v_layers,
dst_v_layers,
src_indices,
dst_indices,
item_size,
num_layers,
block_quota,
num_warps_per_block,
)
elif io_backend == "direct":
raise NotImplementedError("Deprecated interface")
else:
raise ValueError(f"Unsupported io backend")
torch.ops.sgl_kernel.transfer_kv_all_layer(
src_k_layers,
dst_k_layers,
src_v_layers,
dst_v_layers,
src_indices,
dst_indices,
item_size,
num_layers,
block_quota,
num_warps_per_block,
)


def transfer_kv_all_layer_lf_pf(
Expand Down Expand Up @@ -139,28 +124,19 @@ def transfer_kv_per_layer_mla(
dst: torch.Tensor,
src_indices: torch.Tensor,
dst_indices: torch.Tensor,
io_backend: str,
page_size: int,
item_size: int,
Comment thread
xiezhq-hermann marked this conversation as resolved.
block_quota: int = 2,
num_warps_per_block: int = 32,
):
if io_backend == "kernel":
torch.ops.sgl_kernel.transfer_kv_per_layer_mla(
src,
dst,
src_indices,
dst_indices,
item_size * src.element_size(), # todo, hot fix for compatibility
block_quota,
num_warps_per_block,
)
elif io_backend == "direct":
torch.ops.sgl_kernel.transfer_kv_direct(
[src], [dst], src_indices, dst_indices, page_size
)
else:
raise ValueError(f"Unsupported io backend")
torch.ops.sgl_kernel.transfer_kv_per_layer_mla(
src,
dst,
src_indices,
dst_indices,
item_size,
block_quota,
num_warps_per_block,
)


def transfer_kv_per_layer_mla_pf_lf(
Expand Down Expand Up @@ -190,27 +166,21 @@ def transfer_kv_all_layer_mla(
dst_layers: torch.Tensor,
src_indices: torch.Tensor,
dst_indices: torch.Tensor,
io_backend: str,
item_size: int,
Comment thread
xiezhq-hermann marked this conversation as resolved.
num_layers: int,
block_quota: int = 2,
num_warps_per_block: int = 32,
):
if io_backend == "kernel":
torch.ops.sgl_kernel.transfer_kv_all_layer_mla(
src_layers,
dst_layers,
src_indices,
dst_indices,
item_size,
num_layers,
block_quota,
num_warps_per_block,
)
elif io_backend == "direct":
raise NotImplementedError("Deprecated interface")
else:
raise ValueError(f"Unsupported io backend")
torch.ops.sgl_kernel.transfer_kv_all_layer_mla(
src_layers,
dst_layers,
src_indices,
dst_indices,
item_size,
num_layers,
block_quota,
num_warps_per_block,
)


def transfer_kv_all_layer_mla_lf_pf(
Expand Down
10 changes: 2 additions & 8 deletions sgl-kernel/tests/test_kvcacheio.py
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Original file line number Diff line number Diff line change
Expand Up @@ -101,9 +101,7 @@ def test_transfer_kv(
dst_pool_kernel[layer_idx_to_test],
src_indices_device,
dst_indices_device,
io_backend="kernel",
page_size=page_size,
item_size=item_size,
item_size=item_size * dtype.itemsize,
Comment thread
xiezhq-hermann marked this conversation as resolved.
)
transfer_kv_direct(
[src_pool_host[layer_idx_to_test]],
Expand Down Expand Up @@ -138,7 +136,6 @@ def test_transfer_kv(
dst_layers_device,
src_indices_device,
dst_indices_device,
io_backend="kernel",
item_size=item_size * dtype.itemsize,
Comment thread
xiezhq-hermann marked this conversation as resolved.
num_layers=num_layers,
)
Expand Down Expand Up @@ -173,9 +170,7 @@ def test_transfer_kv(
dst_v_pool_kernel[layer_idx_to_test],
src_indices_device,
dst_indices_device,
io_backend="kernel",
page_size=page_size,
item_size=item_size,
item_size=item_size * dtype.itemsize,
Comment thread
xiezhq-hermann marked this conversation as resolved.
)
transfer_kv_direct(
[src_k_pool[layer_idx_to_test], src_v_pool[layer_idx_to_test]],
Expand Down Expand Up @@ -235,7 +230,6 @@ def test_transfer_kv(
dst_v_layers_device,
src_indices_device,
dst_indices_device,
io_backend="kernel",
item_size=item_size * dtype.itemsize,
Comment thread
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num_layers=num_layers,
)
Expand Down
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