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44 lines
2.2 KiB
Markdown
44 lines
2.2 KiB
Markdown
# Token 计量
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[English](token-meter.md) | 中文
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`@deepseek-ai/dsh-token-meter` 公开一个独立的回放快照，用于表示请求压力与按位置计算的 surface 定价。`logRevision` 表示生成该计量中每个字段时所消费的持久事件数量。
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来源：[`packages/llm/token-meter/src/types.ts`](../../packages/llm/token-meter/src/types.ts)
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## `TokenMeasurement`
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```ts type-equiv
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/** Detached immutable request-pressure and surface snapshot at one consumed log revision. */
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interface TokenMeasurement {
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/** Number of durable events consumed; equal to the next unread event seq. */
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readonly logRevision: number
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/** Provider or heuristic anchor used for this measurement. */
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readonly baseline: TokenMeasurementBaseline
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/** Signed repricing of current surface content relative to the baseline anchor. */
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readonly surfaceDeltaTokens: number
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/** Non-negative current request-and-response pressure. */
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readonly totalTokens: number
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/** Total heuristic tokens across the current surface. */
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readonly surfaceTokens: number
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/** Current surface nodes in positional head-to-tail order. */
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readonly nodes: readonly TokenSurfaceNode[]
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}
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```
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`baseline.kind === 'usage'` 表示最近一次成功的提供方调用具有相同的规范请求信封，且当前总量不低于该调用的完整启发式锚点。`estimated` 表示不存在可复用的保守 usage 锚点，因此服务使用固定启发式规则对完整信封和 surface 定价。后续成功请求会替换早先的锚点；有符号的 `surfaceDeltaTokens` 会保留相对于匹配锚点的增长与缩减。`totalTokens` 仍表示请求与响应压力，`surfaceTokens` 则是仅针对 surface 的启发式总量，等于所有节点价格之和。
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## `TokenSurfaceNode`
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```ts type-equiv
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/** One token-priced node in the current ordered session surface. */
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interface TokenSurfaceNode {
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/** Durable sequence number of the surface event. */
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readonly seq: number
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/** Heuristic tokens for the exact message projected by this node. */
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readonly tokens: number
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}
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```
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surface 顺序具有权威性；替换节点的持久 seq 可能高于位置排在其后的节点。该快照不可变，不会随底层回放折叠推进而增长。
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