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[V0][Metrics] Deprecate some KV/prefix cache metrics #14136

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merged 1 commit into from
Mar 3, 2025
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[V0][Metrics] Deprecate some KV/prefix cache metrics #14136

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30 changes: 25 additions & 5 deletions vllm/engine/metrics.py
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Original file line number Diff line number Diff line change
Expand Up @@ -74,31 +74,51 @@ def __init__(self, labelnames: List[str], vllm_config: VllmConfig):
],
multiprocess_mode="livemostrecent",
)

# Deprecated in 0.8 - KV cache offloading is not used in V1
# TODO: in 0.9, only enable if show_hidden_metrics=True
self.gauge_scheduler_swapped = self._gauge_cls(
name="vllm:num_requests_swapped",
documentation="Number of requests swapped to CPU.",
documentation=(
"Number of requests swapped to CPU. "
"DEPRECATED: KV cache offloading is not used in V1"),
labelnames=labelnames,
multiprocess_mode="sum")

# KV Cache Usage in %
self.gauge_gpu_cache_usage = self._gauge_cls(
name="vllm:gpu_cache_usage_perc",
documentation="GPU KV-cache usage. 1 means 100 percent usage.",
labelnames=labelnames,
multiprocess_mode="sum")

# Deprecated in 0.8 - KV cache offloading is not used in V1
# TODO: in 0.9, only enable if show_hidden_metrics=True
self.gauge_cpu_cache_usage = self._gauge_cls(
name="vllm:cpu_cache_usage_perc",
documentation="CPU KV-cache usage. 1 means 100 percent usage.",
documentation=(
"CPU KV-cache usage. 1 means 100 percent usage. "
"DEPRECATED: KV cache offloading is not used in V1"),
labelnames=labelnames,
multiprocess_mode="sum")
# Prefix caching block hit rate

# Deprecated in 0.8 - KV cache offloading is not used in V1
# TODO: in 0.9, only enable if show_hidden_metrics=True
self.gauge_cpu_prefix_cache_hit_rate = self._gauge_cls(
name="vllm:cpu_prefix_cache_hit_rate",
documentation="CPU prefix cache block hit rate.",
documentation=(
"CPU prefix cache block hit rate. "
"DEPRECATED: KV cache offloading is not used in V1"),
labelnames=labelnames,
multiprocess_mode="sum")

# Deprecated in 0.8 - replaced by queries+hits counters in V1
# TODO: in 0.9, only enable if show_hidden_metrics=True
self.gauge_gpu_prefix_cache_hit_rate = self._gauge_cls(
name="vllm:gpu_prefix_cache_hit_rate",
documentation="GPU prefix cache block hit rate.",
documentation=("GPU prefix cache block hit rate. "
"DEPRECATED: use vllm:gpu_prefix_cache_queries and "
"vllm:gpu_prefix_cache_queries in V1"),
labelnames=labelnames,
multiprocess_mode="sum")

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