For joint K+V compression on RULER-4k, the best splits reverse the PPL/LongBench pattern and are balanced to K-heavy; K_bpd=1 loses roughly 15–30 accuracy points, and KQ-SVD is near zero on Qwen across almost every split.

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 · contextLength: 4096	67.33%	—	Not assessed
kBpd: 2 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 5 · contextLength: 4096	87.61%	—	Not assessed
kBpd: 3 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 5 · contextLength: 4096	92.07%	—	Not assessed
kBpd: 1 · vBpd: 5 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6 · contextLength: 4096	68.65%	—	Not assessed
kBpd: 2 · vBpd: 4 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6 · contextLength: 4096	88.33%	—	Not assessed
kBpd: 3 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6 · contextLength: 4096	93.71%	—	Not assessed
kBpd: 4 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6 · contextLength: 4096	93.11%	—	Not assessed
kBpd: 1 · vBpd: 6 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7 · contextLength: 4096	68.6%	—	Not assessed
kBpd: 2 · vBpd: 5 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7 · contextLength: 4096	88.24%	—	Not assessed
kBpd: 3 · vBpd: 4 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7 · contextLength: 4096	93.72%	—	Not assessed
kBpd: 4 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7 · contextLength: 4096	93.88%	—	Not assessed
kBpd: 5 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7 · contextLength: 4096	93.43%	—	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 · contextLength: 4096

67.33%

—

Not assessed

kBpd: 2 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 5 · contextLength: 4096

87.61%

—

Not assessed

kBpd: 3 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 5 · contextLength: 4096

92.07%

—

Not assessed

kBpd: 1 · vBpd: 5 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6 · contextLength: 4096

68.65%

—

Not assessed

kBpd: 2 · vBpd: 4 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6 · contextLength: 4096

88.33%

—

Not assessed

kBpd: 3 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6 · contextLength: 4096

93.71%

—

Not assessed

kBpd: 4 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 6 · contextLength: 4096

93.11%

—

Not assessed

kBpd: 1 · vBpd: 6 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7 · contextLength: 4096

68.6%

—

Not assessed

kBpd: 2 · vBpd: 5 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7 · contextLength: 4096

88.24%

—

Not assessed

kBpd: 3 · vBpd: 4 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7 · contextLength: 4096

93.72%

—

Not assessed

kBpd: 4 · vBpd: 3 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7 · contextLength: 4096

93.88%

—

Not assessed

kBpd: 5 · vBpd: 2 · model: LLaMA-3.1-8B · sides: K+V · method: KV-COBRA_MSE · totalBpd: 7 · contextLength: 4096

93.43%

—

Not assessed

Reported and observed measurements

Assessments (0)

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Measurement results