clock_nanosleep().
timerfd would be the preferred timing source on any remotely modern linux kernel
> On Jun 4, 2015, at 6:47 AM, Stanislav Sinyagin <ssinyagin@gmail.com> wrote:
>
> I summarized some experience gained in a customer project, hopefully
> it will be useful:
> https://txlab.wordpress.com/2015/06/02/quality-assurance-for-voip-calls-2/
>
> @Anthony, you suggested to use HPET timer for better precision, but it
> appears that it is affected by the CPU load: while the debian package
> build script was running, the quality of recorded calls has degraded
> -- even that the recording was done onto a TMPFS partition. With the
> default TSC timer, this was not the case.
>
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