In the joint K+V Wikitext-2 sweep, V-heavy splits generally produced lower perplexity; KV-COBRA_KL supplied the best cell in seven of nine model-by-total-budget blocks, while V_bpd=2 caused severe LLaMA and Mistral degradation and KQ-SVD diverged on Qwen cells with K_bpd=1.

Reported and observed measurements

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Each row is a measurement with its reported value, latest available observation, and cumulative evidence state.
Metric and conditions	Reported	Latest observation	Evidence judgment
kBpd: 1 · vBpd: 4 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 5	17.35 perplexity	—	Not assessed
kBpd: 2 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 5	38.84 perplexity	—	Not assessed
kBpd: 3 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 5	732.1 perplexity	—	Not assessed
kBpd: 1 · vBpd: 5 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6	15.79 perplexity	—	Not assessed
kBpd: 2 · vBpd: 4 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6	17.88 perplexity	—	Not assessed
kBpd: 3 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6	19.17 perplexity	—	Not assessed
kBpd: 4 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6	550.4 perplexity	—	Not assessed
kBpd: 1 · vBpd: 6 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7	15.21 perplexity	—	Not assessed
kBpd: 2 · vBpd: 5 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7	15.48 perplexity	—	Not assessed
kBpd: 3 · vBpd: 4 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7	6.69 perplexity	—	Not assessed
kBpd: 4 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7	17.26 perplexity	—	Not assessed
kBpd: 5 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7	505.7 perplexity	—	Not assessed

Metric and conditions

Reported

Latest observation

Evidence judgment

kBpd: 1 · vBpd: 4 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 5

17.35 perplexity

—

Not assessed

kBpd: 2 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 5

38.84 perplexity

—

Not assessed

kBpd: 3 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 5

732.1 perplexity

—

Not assessed

kBpd: 1 · vBpd: 5 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6

15.79 perplexity

—

Not assessed

kBpd: 2 · vBpd: 4 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6

17.88 perplexity

—

Not assessed

kBpd: 3 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6

19.17 perplexity

—

Not assessed

kBpd: 4 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6

550.4 perplexity

—

Not assessed

kBpd: 1 · vBpd: 6 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7

15.21 perplexity

—

Not assessed

kBpd: 2 · vBpd: 5 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7

15.48 perplexity

—

Not assessed

kBpd: 3 · vBpd: 4 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7

6.69 perplexity

—

Not assessed

kBpd: 4 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7

17.26 perplexity

—

Not assessed

kBpd: 5 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7

505.7 perplexity

—

Not assessed

Reported and observed measurements

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Measurement results