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[v1] Support multiple KV cache groups in GPU model runner (#17945)

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Signed-off-by: Chen Zhang <zhangch99@outlook.com>
This commit is contained in:
Chen Zhang
2025-05-15 09:54:54 +08:00
committed by GitHub
parent f25e0d1125
commit e60f550b38
16 changed files with 482 additions and 215 deletions
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71
tests/v1/core/test_kv_cache_utils.py
View File

@@ -19,7 +19,8 @@ from vllm.v1.core.kv_cache_utils import (NONE_HASH, BlockHashType,
hash_request_tokens,
unify_kv_cache_configs)
from vllm.v1.kv_cache_interface import (FullAttentionSpec, KVCacheConfig,
KVCacheGroupSpec, KVCacheTensor)
KVCacheGroupSpec, KVCacheTensor,
SlidingWindowSpec)
from vllm.v1.metrics.stats import PrefixCacheStats
from vllm.v1.request import Request
@@ -54,12 +55,14 @@ def new_kv_cache_spec(block_size=16,
num_kv_heads=2,
head_size=64,
dtype=torch.float32,
use_mla=False):
use_mla=False,
sliding_window=None):
return FullAttentionSpec(block_size=block_size,
num_kv_heads=num_kv_heads,
head_size=head_size,
dtype=dtype,
use_mla=use_mla)
use_mla=use_mla,
sliding_window=sliding_window)
def test_none_hash():
@@ -471,6 +474,68 @@ def test_unify_kv_cache_configs():
unify_kv_cache_configs(diff_kv_cache_config)
def test_merge_kv_cache_spec():
same_layer_specs = [
new_kv_cache_spec(num_kv_heads=32),
new_kv_cache_spec(num_kv_heads=32),
]
merged_layer_spec = same_layer_specs[0].merge(same_layer_specs)
assert merged_layer_spec.block_size == 16
assert merged_layer_spec.num_kv_heads == 32
assert merged_layer_spec.head_size == 64
assert merged_layer_spec.dtype == torch.float32
assert merged_layer_spec.sliding_window is None
different_layer_specs = [
new_kv_cache_spec(num_kv_heads=32),
new_kv_cache_spec(num_kv_heads=16),
]
with pytest.raises(AssertionError):
different_layer_specs[0].merge(different_layer_specs)
full_spec = new_kv_cache_spec(num_kv_heads=32)
different_type_layer_specs = [
full_spec,
SlidingWindowSpec(
block_size=full_spec.block_size,
num_kv_heads=full_spec.num_kv_heads,
head_size=full_spec.head_size,
dtype=full_spec.dtype,
use_mla=full_spec.use_mla,
sliding_window=1,
),
]
with pytest.raises(AssertionError):
different_type_layer_specs[0].merge(different_type_layer_specs)
with pytest.raises(AssertionError):
different_type_layer_specs[1].merge(different_type_layer_specs)
different_sliding_window_layer_specs = [
new_kv_cache_spec(num_kv_heads=32),
new_kv_cache_spec(num_kv_heads=32, sliding_window=1),
new_kv_cache_spec(num_kv_heads=32, sliding_window=2),
]
with pytest.raises(ValueError):
different_sliding_window_layer_specs[0].merge(
different_sliding_window_layer_specs)
same_sliding_window_layer_specs = [
new_kv_cache_spec(num_kv_heads=32, sliding_window=1),
new_kv_cache_spec(num_kv_heads=32, sliding_window=1),
]
merged_layer_spec = same_sliding_window_layer_specs[0].merge(
same_sliding_window_layer_specs)
assert merged_layer_spec.sliding_window == 1
same_sliding_window_layer_spec_with_none = [
new_kv_cache_spec(num_kv_heads=32, sliding_window=1),
new_kv_cache_spec(num_kv_heads=32, sliding_window=None),
]
merged_layer_spec = same_sliding_window_layer_spec_with_none[0].merge(
same_sliding_window_layer_spec_with_none)
assert merged_layer_spec.sliding_window == 1
@pytest.mark.parametrize(
("model_id", "max_model_len", "want_estimated_max_len"), [
("Qwen/Qwen1.5-7B", 16385, 16384),

36
tests/v1/core/test_prefix_caching.py
View File

@@ -84,7 +84,7 @@ def test_prefill(hash_algo):
blocks = manager.allocate_slots(req0, 55,
len(computed_blocks.blocks) * 16,
computed_blocks)
assert blocks.get_block_ids() == [1, 2, 3, 4]
assert blocks.get_block_ids() == [[1, 2, 3, 4]]
# Check full block metadata
parent_block_hash = None
@@ -107,13 +107,13 @@ def test_prefill(hash_algo):
req1 = make_request("1", common_token_ids + unique_token_ids)
computed_blocks, num_computed_tokens = manager.get_computed_blocks(req1)
assert len(manager.req_to_block_hashes[req1.request_id]) == 3
assert computed_blocks.get_block_ids() == [1, 2, 3]
assert computed_blocks.get_block_ids() == [[1, 2, 3]]
assert num_computed_tokens == 3 * 16
num_new_tokens = 53 - 3 * 16
blocks = manager.allocate_slots(req1, num_new_tokens,
len(computed_blocks.blocks) * 16,
computed_blocks)
assert blocks.get_block_ids() == [5]
assert blocks.get_block_ids() == [[5]]
for block in computed_blocks.blocks:
assert block.ref_cnt == 2
@@ -141,13 +141,13 @@ def test_prefill(hash_algo):
req2 = make_request("2", common_token_ids + unique_token_ids)
computed_blocks, num_computed_tokens = manager.get_computed_blocks(req2)
assert len(manager.req_to_block_hashes[req2.request_id]) == 3
assert computed_blocks.get_block_ids() == [1, 2, 3]
assert computed_blocks.get_block_ids() == [[1, 2, 3]]
assert num_computed_tokens == 3 * 16
num_new_tokens = 53 - 3 * 16
blocks = manager.allocate_slots(req2, num_new_tokens,
len(computed_blocks.blocks) * 16,
computed_blocks)
assert blocks.get_block_ids() == [6]
assert blocks.get_block_ids() == [[6]]
# Although we only have 6 free blocks, we have 8 blocks in
# the free block queue due to lazy removal.
@@ -171,7 +171,7 @@ def test_prefill(hash_algo):
len(computed_blocks.blocks) * 16,
computed_blocks)
# This block ID order also checks the eviction order.
assert blocks.get_block_ids() == [7, 8, 9, 10, 4, 5, 6, 3, 2, 1]
assert blocks.get_block_ids() == [[7, 8, 9, 10, 4, 5, 6, 3, 2, 1]]
assert manager.block_pool.free_block_queue.num_free_blocks == 0
assert manager.block_pool.free_block_queue.free_list_head is None
assert manager.block_pool.free_block_queue.free_list_tail is None
@@ -208,7 +208,7 @@ def test_prefill_plp():
blocks = manager.allocate_slots(req0, 55,
len(computed_blocks.blocks) * 16,
computed_blocks)
assert blocks.get_block_ids() == [1, 2, 3, 4]
assert blocks.get_block_ids() == [[1, 2, 3, 4]]
req0_block_hashes = [b.block_hash for b in blocks.blocks]
# Check full block metadata
@@ -233,13 +233,13 @@ def test_prefill_plp():
req1 = make_request("1", common_token_ids + unique_token_ids)
computed_blocks, num_computed_tokens = manager.get_computed_blocks(req1)
assert len(manager.req_to_block_hashes[req1.request_id]) == 3
assert computed_blocks.get_block_ids() == [1, 2, 3]
assert computed_blocks.get_block_ids() == [[1, 2, 3]]
assert num_computed_tokens == 3 * 16
num_new_tokens = 53 - 3 * 16
blocks = manager.allocate_slots(req1, num_new_tokens,
len(computed_blocks.blocks) * 16,
computed_blocks)
assert blocks.get_block_ids() == [5]
assert blocks.get_block_ids() == [[5]]
for block in computed_blocks.blocks:
assert block.ref_cnt == 2
@@ -277,11 +277,11 @@ def test_prefill_plp():
block_ids = blocks.get_block_ids()
# Duplicate cached blocks have different ids but same hashes vs request #0
assert [b.block_hash for b in blocks.blocks] == req0_block_hashes
assert block_ids != [1, 2, 3, 4]
assert block_ids != [[1, 2, 3, 4]]
# Request #2 block hashes are valid since request #0 hashes are.
# Check block reference counts.
for block_id in block_ids:
for block_id in block_ids[0]:
assert manager.block_pool.blocks[block_id].ref_cnt == 1
manager.free(req2)
@@ -307,7 +307,7 @@ def test_decode():
blocks = manager.allocate_slots(req0, 55,
len(computed_blocks.blocks) * 16,
computed_blocks)
assert blocks.get_block_ids() == [1, 2, 3, 4]
assert blocks.get_block_ids() == [[1, 2, 3, 4]]
# Append slots without allocating a new block.
req0.num_computed_tokens = 55
@@ -379,12 +379,12 @@ def test_evict():
# Touch the first 2 blocks.
req2 = make_request("2", list(range(2 * 16 + 3)))
computed_blocks, num_computed_tokens = manager.get_computed_blocks(req2)
assert computed_blocks.get_block_ids() == [1, 2]
assert computed_blocks.get_block_ids() == [[1, 2]]
assert num_computed_tokens == 2 * 16
blocks = manager.allocate_slots(req2, 3,
len(computed_blocks.blocks) * 16,
computed_blocks)
assert blocks.get_block_ids() == [10]
assert blocks.get_block_ids() == [[10]]
assert manager.block_pool.free_block_queue.num_free_blocks == 7
@@ -625,7 +625,7 @@ def test_mm_prefix_caching():
blocks = manager.allocate_slots(req0, 59,
len(computed_blocks.blocks) * 16,
computed_blocks)
assert blocks.get_block_ids() == [1, 2, 3, 4]
assert blocks.get_block_ids() == [[1, 2, 3, 4]]
req0.num_computed_tokens = 59
# Append slots without allocating a new block.
@@ -686,7 +686,7 @@ def test_cache_key_salting():
blocks = manager.allocate_slots(req0, 59,
len(computed_blocks.blocks) * 16,
computed_blocks)
assert blocks.get_block_ids() == [1, 2, 3, 4]
assert blocks.get_block_ids() == [[1, 2, 3, 4]]
req0.num_computed_tokens = 59
# Append slots without allocating a new block.
@@ -797,7 +797,7 @@ def test_reset_prefix_cache():
all_token_ids = full_block_token_ids + unique_token_ids
req0 = make_request("0", all_token_ids)
blocks = manager.allocate_slots(req0, 55)
assert blocks.get_block_ids() == [1, 2, 3, 4]
assert blocks.get_block_ids() == [[1, 2, 3, 4]]
unique_token_ids = [4] * 7
all_token_ids = full_block_token_ids + unique_token_ids
@@ -808,7 +808,7 @@ def test_reset_prefix_cache():
blocks = manager.allocate_slots(req1, 7,
len(computed_blocks.blocks) * 16,
computed_blocks)
assert blocks.get_block_ids() == [5]
assert blocks.get_block_ids() == [[5]]
# Failed to reset prefix cache because some blocks are not freed yet.
assert not manager.reset_prefix_cache()