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Issue with timestamp queries with multi-pass

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难度
4/5
预计耗时
3-5 天
新手友好度
35/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
停滞
技术栈
typescript
领域
performance

调研方向

Start by locating the timestamp query example and its TimestampQueryManager, then reproduce measurements for one pass and for two passes recorded from the same command encoder. Trace how timestamps are placed and how multi-pass results are associated with passes. Done means each pass reports its own consistent timing in both scenarios.

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描述

Hi,

I encountered an issue with the TimestampQueryManager while working with the timestamp query example. It functions correctly when measuring a single pass. However, when multiple passes are measured from the same command encoder, the timing results become inconsistent.

For example, in my project, I have two passes:

  • One pass takes approximately 5ms when measured individually.
  • The other pass takes 0.3ms when measured individually.

However, when both passes are measured simultaneously, the results indicate that both passes take around 5ms, which is unexpected unless perhaps I am missing something?

@greggman Any idea what could cause this?

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