Metal encoder & pass timestamp support #4008
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Wumpf
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Aug 19, 2023
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Pulling this out of draft - @Wumpf can you rebase and then let's land this thing. |
(this path is never hit on M1 for instance!)
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Sep 19, 2023
Implements timer queries via write_timestamp on Metal for encoders (whenever timer queries are available) and passes (for Intel/AMD GPUs, where we should advertise TIMESTAMP_QUERY_INSIDE_PASSES now). Due to some bugs in Metal this was a lot harder than expected. I believe the solution is close to optimal with the current restrictions in place. For details see code comments.
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Checklist
cargo clippy.cargo clippy --target wasm32-unknown-unknownif applicable.Connections
Description
Implements timer queries via
write_timestampon Metal for encoders (whenever timer queries are available) and passes (for Intel/AMD GPUs, where we should advertiseTIMESTAMP_QUERY_INSIDE_PASSESnow).Due to some bugs in Metal this was a lot harder than expected. I believe the solution is close to optimal with the current restrictions in place. For details see code comments.
Testing
Tested on an Apple Silicon device - this always goes a slow path and does not have
TIMESTAMP_QUERY_INSIDE_PASSESavailable.TODO: Test on AMD or Intel device where we have
TIMESTAMP_QUERY_INSIDE_PASSESand can go the fast & simple path.