GitLab

Signed-off-by: yewentao256 <zhyanwentao@126.com>

Signed-off-by: Lihao Ran <imlihao.ran@gmail.com>

Signed-off-by: Or Ozeri <oro@il.ibm.com>

Signed-off-by: Or Ozeri <oro@il.ibm.com>

Signed-off-by: Yifan Qiao <yifanqiao@berkeley.edu>

Signed-off-by: Lihao Ran <imlihao.ran@gmail.com>
Signed-off-by: Lumosis <30372757+Lumosis@users.noreply.github.com>

Signed-off-by: njhill <nickhill123@gmail.com>

Signed-off-by: Yifan Qiao <yifanqiao@berkeley.edu>
Co-authored-by: KuntaiDu <kuntai@uchicago.edu>

Signed-off-by: mgoin <mgoin64@gmail.com>

Signed-off-by: Chen Zhang <zhangch99@outlook.com>
Signed-off-by: Yifan Qiao <yifanqiao@berkeley.edu>
Co-authored-by: Yifan Qiao <yifanqiao@berkeley.edu>

Signed-off-by: Roger Wang <hey@rogerw.io>
Co-authored-by: Sun Kim <sunytokki@gmail.com>

Signed-off-by: Or Ozeri <oro@il.ibm.com>

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

Signed-off-by: Randall Smith <ransmith@amd.com>
Co-authored-by: Randall Smith <ransmith@amd.com>

Signed-off-by: Mark McLoughlin <markmc@redhat.com>

Signed-off-by: chaunceyjiang <chaunceyjiang@gmail.com>
Signed-off-by: Nick Hill <nhill@redhat.com>
Co-authored-by: Nick Hill <nhill@redhat.com>

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

Signed-off-by: Zhuohan Li <zhuohan123@gmail.com>
Signed-off-by: Nick Hill <nhill@redhat.com>
Co-authored-by: Nick Hill <nhill@redhat.com>

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>

Signed-off-by: Marcin Ostrowski <marcinx.ostrowski@intel.com>

Signed-off-by: maang <maang_h@163.com>

Signed-off-by: Yifan Qiao <yifanqiao@berkeley.edu>
Co-authored-by: Chen Zhang <zhangch99@outlook.com>

Signed-off-by: wang.yuqi <yuqi.wang@daocloud.io>

Signed-off-by: Chen Zhang <zhangch99@outlook.com>

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Co-authored-by: Nicolò Lucchesi <nlucches@redhat.com>

Signed-off-by: Jialin Ouyang <Jialin.Ouyang@gmail.com>

Signed-off-by: Jialin Ouyang <Jialin.Ouyang@gmail.com>
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Co-authored-by: Jialin Ouyang <Jialin.Ouyang@gmail.com>

[Core] Performance: Use list[np.ndarray] instead of list[list[int]] for output tokens for GC optimization (#26368)
Signed-off-by: Jialin Ouyang <Jialin.Ouyang@gmail.com>

Signed-off-by: Marcin Ostrowski <marcinx.ostrowski@intel.com>

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

Signed-off-by: Mark McLoughlin <markmc@redhat.com>

Signed-off-by: Andy Lo <andy@mistral.ai>

Signed-off-by: n00909098 <nguyen.kha.long@huawei.com>
Signed-off-by: knlnguyen1802 <knlnguyen1802@gmail.com>
Signed-off-by: herotai214 <herotai214@gmail.com>
Signed-off-by: Khuong Le <khuong.le.manh@huawei.com>
Signed-off-by: Khuong Le <lemanhkhuong2611@gmail.com>
Co-authored-by: n00909098 <nguyen.kha.long@huawei.com>
Co-authored-by: knlnguyen1802 <knlnguyen1802@gmail.com>
Co-authored-by: herotai214 <herotai214@gmail.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Khuong Le <khuong.le.manh@huawei.com>
Co-authored-by: Khuong Le <lemanhkhuong2611@gmail.com>

[Hybrid allocator + kv connector] revert connector test changes related to hybrid allocator (#28011)
Signed-off-by: KuntaiDu <kuntai@uchicago.edu>

Signed-off-by: Nick Hill <nhill@redhat.com>

Signed-off-by: Biswa Panda <biswa.panda@gmail.com>