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SubjectRe: a joint letter on low latency and Linux
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> no HZ=1000 is not needed , since your task get woken up by
> blocking write() to /dev/dsp.

This doesnt work for mmap, and you need the finer granularity than some
cards can provide. Using HZ=1000 materially improves the feel of Linux x86
on modern CPUs and also appears to improve throughput not reduce it

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