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[Feature] support hierarchical cache in v1 #3939

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Merged
xiegegege merged 2 commits into from
Sep 7, 2025
Merged

[Feature] support hierarchical cache in v1 #3939

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283e1a9
[Feature] support hierarchical cache in v1
rainyfly Sep 7, 2025
00e108f
Merge branch 'release/2.2' into support_hierarchical_cache_in_v1
rainyfly Sep 7, 2025
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18 changes: 18 additions & 0 deletions fastdeploy/engine/sched/resource_manager_v1.py
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Original file line number Diff line number Diff line change
Expand Up @@ -348,6 +348,15 @@ def schedule(self):
if request.status == RequestStatus.WAITING:
# Enable prefix caching
if self.config.cache_config.enable_prefix_caching:
if (
self.config.cache_config.enable_hierarchical_cache
and self.cache_manager.num_cpu_blocks > 0
):
if not self.cache_manager.can_allocate_gpu_blocks(
(request.need_prefill_tokens + self.config.cache_config.block_size - 1)
// self.config.cache_config.block_size
): # to prevent block allocation for matching in hierarchical cache and cause dead lock
break
success = self.get_prefix_cached_blocks(request)
if not success:
self._free_blocks(request)
Expand Down Expand Up @@ -387,6 +396,15 @@ def schedule(self):
request.num_total_tokens
) # Before preempted task rescheduled, preempted task has been sent to engine, no more tokens are output, here num_total_tokens should be static and correct
if self.config.cache_config.enable_prefix_caching:
if (
self.config.cache_config.enable_hierarchical_cache
and self.cache_manager.num_cpu_blocks > 0
):
if not self.cache_manager.can_allocate_gpu_blocks(
(request.need_prefill_tokens + self.config.cache_config.block_size - 1)
// self.config.cache_config.block_size
): # to prevent block allocation for matching in hierarchical cache and cause dead lock
break
success = self.get_prefix_cached_blocks(request)
if not success:
self._free_blocks(request)
Expand Down
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