[PAL/vm-common] Check the "break" variable less frequently in delay()
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Previously, `delay()` function accessed the "break out of loop early" variable `continue_gate` basically on every CPU cycle. This variable is typically a global variable causing high contention on multi-core workloads. This e.g. manifested in the Candle Quantized LLaMA app. This commit fixes this by checking the variable less frequently. The current heuristic is to check it every 1 ms. Signed-off-by: Dmitrii Kuvaiskii <[email protected]>
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Description of the changes
Previously,
delay()function accessed the "break out of loop early" variablecontinue_gatebasically on every CPU cycle. This variable is typically a global variable causing high contention on multi-core workloads. This e.g. manifested in the Candle Quantized LLaMA app.This PR fixes this by checking the variable less frequently. The current heuristic is to check it every 1 ms.
How to test this PR?
Run the Candle example; it shows better scalability.
TODO: Run other benchmarks to see if they are also ok.
This change is