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34 Commits
Author SHA1 Message Date
zhongdaor-nvNicolò LucchesiCyrus Leung
 		a0fe7ea2f0 [feat] Add per-block extra_keys to KV events (#33304) 
Signed-off-by: zhongdaor-nv <zhongdaor@nvidia.com>
Co-authored-by: Nicolò Lucchesi <nlucches@redhat.com>
Co-authored-by: Cyrus Leung <tlleungac@connect.ust.hk>
 2026-02-20 20:11:40 -08:00
Harry HuangandChen Zhang 5206e5e28c [V1][Hybrid] Mamba Prefix Caching with align mode (#30877) 
Signed-off-by: huanghaoyan.hhy <huanghaoyan.hhy@alibaba-inc.com>
Signed-off-by: Chen Zhang <zhangch99@outlook.com>
Co-authored-by: Chen Zhang <zhangch99@outlook.com>
 2026-01-23 09:56:48 -08:00
SageandSage 39512aba72 [Prefix Cache] Include lora_name in BlockStored event for deterministic KV-cache reconstruction (#27577) 
Signed-off-by: Sage Ahrac <sagiahrak@gmail.com>
Co-authored-by: Sage <80211083+sagiahrac@users.noreply.github.com>
 2025-12-30 00:17:16 +00:00
Yifan QiaoandKuntaiDu 52bf066516 [Core][Hybrid allocator + connector] Support hybrid allocator + kv cache connector (#30166) 
Signed-off-by: Yifan Qiao <yifanqiao@berkeley.edu>
Co-authored-by: KuntaiDu <kuntai@uchicago.edu>
 2025-12-26 18:25:46 -08:00
Chen ZhangandYifan Qiao 538e830caa [KVEvent] User request.block_hash for parent block_hash (#30544) 
Signed-off-by: Chen Zhang <zhangch99@outlook.com>
Signed-off-by: Yifan Qiao <yifanqiao@berkeley.edu>
Co-authored-by: Yifan Qiao <yifanqiao@berkeley.edu>
 2025-12-23 18:23:43 -08:00
Will EatonMark McLoughlinNick Hillchaunceyjiang
 		a9e4106f28 [P/D] KV Load Failure Recovery/Abort Configuration (#26813) 
Signed-off-by: Will Eaton <weaton@redhat.com>
Signed-off-by: Will Eaton <me@wseaton.com>
Signed-off-by: Nick Hill <nhill@redhat.com>
Co-authored-by: Mark McLoughlin <markmc@redhat.com>
Co-authored-by: Nick Hill <nhill@redhat.com>
Co-authored-by: chaunceyjiang <chaunceyjiang@gmail.com>
 2025-12-10 11:00:52 -08:00
shivampr cabc77cc86 [Core][Observability] Add KV cache residency metrics (#27793) 
Introduces three new Prometheus histograms for fine-grained observability of KV cache residency behavior:

vllm:kv_block_lifetime_seconds — total lifetime from allocation to free
vllm:kv_block_idle_before_evict_seconds — idle duration before eviction
vllm:kv_block_reuse_gap_seconds — time between consecutive reuses of the same block

These metrics help operators analyze KV cache efficiency, reuse patterns, and eviction timing beyond simple utilization rates.

Implementation uses monotonic timestamps for accuracy, 1% sampling for minimal overhead (~48 bytes/block), and is fully thread-safe with zero runtime cost when disabled.

Two new runtime flags are introduced:

--kv-cache-metrics – enable KV cache residency metrics
--kv-cache-metrics-sample – control sampling ratio (default: 0.01)

Signed-off-by: Shivam <shivamprasad91@gmail.com>
 2025-12-01 18:27:53 +00:00
Yifan QiaoandChen Zhang 48ddb02b79 [Hybrid Allocator] Support KV cache groups with different block_size (#29143) 
Signed-off-by: Yifan Qiao <yifanqiao@berkeley.edu>
Co-authored-by: Chen Zhang <zhangch99@outlook.com>
 2025-11-25 10:30:57 -05:00
Biswa Panda 1bf43ae35d [BugFix][LoRA] use adapter_id instead of id field of lora_request (#27728) 
Signed-off-by: Biswa Panda <biswa.panda@gmail.com>
 2025-11-03 10:08:08 +08:00
Jialin Ouyang acaa2c0a4a [Core] Reuse empty block lists whenever possible in KVCacheBlocks to mitigate GC costs (#24964) 
Signed-off-by: Jialin Ouyang <Jialin.Ouyang@gmail.com>
 2025-10-14 12:58:43 -07:00
Harry Mellor 8fcaaf6a16 Update Optional[x] -> x | None and Union[x, y] to x | y (#26633) 
Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>
 2025-10-12 09:51:31 -07:00
Harry Mellor d6953beb91 Convert formatting to use ruff instead of yapf + isort (#26247) 
Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>
 2025-10-05 07:06:22 -07:00
David Ben-DavidandDavid Ben-David 9a9f48dff7 [V1] [P/D] Add Support for KV Load Failure Recovery (#19330) 
Signed-off-by: David Ben-David <davidb@pliops.com>
Co-authored-by: David Ben-David <davidb@pliops.com>
 2025-09-30 14:57:08 -07:00
Jialin Ouyang 4f8c4b890a [Core] Use KVCacheBlock as much as possible instead of dict[block_id, KVCacheBlock] (#24830) 
Signed-off-by: Jialin Ouyang <Jialin.Ouyang@gmail.com>
 2025-09-23 15:11:14 -07:00
Zebing Lin 82dfb12e52 [Core] Use sha256 bytes instead of BlockHash to reduce GC overhead (#23673) 
Signed-off-by: linzebing <linzebing1995@gmail.com>
 2025-09-08 21:34:37 -07:00
Or Ozeri 14b4326b94 v1: Support KV events from connectors (#19737) 
Signed-off-by: Or Ozeri <oro@il.ibm.com>
 2025-09-01 01:13:21 +00:00
Nick Hill 8fd920924c [BugFix] Fix stuck stats/metrics after requests are aborted (#22995) 
Signed-off-by: Nick Hill <nhill@redhat.com>
 2025-08-20 13:50:29 +08:00
Or Ozeri c280066f9d [v1] Move block_hashes from KVCacheManager to Request.block_hashes (#19728) 
Signed-off-by: Or Ozeri <oro@il.ibm.com>
 2025-08-15 16:52:52 -07:00
Ruixiang Tan 8f4a1c9a04 [Misc] Improve code readability of KVCacheManager (#21673) 
Signed-off-by: tanruixiang <tanruixiang0104@gmail.com>
Signed-off-by: Ruixiang Tan <819464715@qq.com>
Signed-off-by: GitHub <noreply@github.com>
 2025-07-30 07:20:43 -07:00
Jialin Ouyang ed25054577 [Core] Introduce popleft_n and append_n in FreeKVCacheBlockQueue to further optimize block_pool (#21222) 
Signed-off-by: Jialin Ouyang <Jialin.Ouyang@gmail.com>
 2025-07-22 06:17:47 -07:00
Simon Mo 32142b3c62 [Bugfix] Fix eviction cached blocked logic (#21357) 
Signed-off-by: simon-mo <simon.mo@hey.com>
 2025-07-22 01:18:40 -07:00
Jialin Ouyang af376ca19d [Core] Minimize number of dict lookup in _maybe_evict_cached_block (#21281) 
Signed-off-by: Jialin Ouyang <Jialin.Ouyang@gmail.com>
 2025-07-21 22:37:34 -07:00
Nick Hill 646d62f636 [Core] Use tuple for kv cache group block ids (#19175) 
Signed-off-by: Nick Hill <nhill@redhat.com>
 2025-06-10 07:01:17 +02:00
Chen Zhang f8a1a2d108 [v1] Hybrid Memory Allocator (#17996) 
Signed-off-by: Chen Zhang <zhangch99@outlook.com>
 2025-06-05 20:47:09 -07:00
Chen Zhang b5fd9506c1 [Bugfix] get_num_blocks_to_allocate with null_block (#19031) 
Signed-off-by: Chen Zhang <zhangch99@outlook.com>
 2025-06-03 15:30:55 -07:00
Simon Mo 02f0c7b220 [Misc] Add SPDX-FileCopyrightText (#19100) 
Signed-off-by: simon-mo <simon.mo@hey.com>
 2025-06-03 11:20:17 -07:00
Chen Zhang f32fcd9444 [v1][KVCacheManager] Rename BlockHashType to BlockHash (#19015) 
Signed-off-by: Chen Zhang <zhangch99@outlook.com>
 2025-06-03 08:01:48 +00:00
AlecandMark McLoughlin 0be6d05b5e [V1][Metrics] add support for kv event publishing (#16750) 
Signed-off-by: alec-flowers <aflowers@nvidia.com>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Co-authored-by: Mark McLoughlin <markmc@redhat.com>
 2025-04-30 07:44:45 -07:00
Woosuk Kwon b10e519895 [V1][Minor] Optimize get_cached_block (#16135) 2025-04-06 20:48:14 +00:00
Chen Zhang 3a5f0afcd2 [V1] Implement sliding window attention in kv_cache_manager (#14097) 
Signed-off-by: Chen Zhang <zhangch99@outlook.com>
 2025-04-01 00:33:17 -07:00
marko 27df5199d9 Support SHA256 as hash function in prefix caching (#15297) 
Signed-off-by: Marko Rosenmueller <5467316+dr75@users.noreply.github.com>
 2025-03-26 11:11:28 -07:00
Harry Mellor cf069aa8aa Update deprecated Python 3.8 typing (#13971) 2025-03-02 17:34:51 -08:00
Chen Zhang b9f1d4294e [v1][Bugfix] Only cache blocks that are not in the prefix cache (#14073) 2025-03-01 08:25:54 +00:00
Chen ZhangandCody Yu 28943d36ce [v1] Move block pool operations to a separate class (#13973) 
Signed-off-by: Chen Zhang <zhangch99@outlook.com>
Co-authored-by: Cody Yu <hao.yu.cody@gmail.com>
 2025-02-28 20:53:31 +00:00