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https://issues.apache.org/jira/browse/TS-1775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15059380#comment-15059380
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Alan M. Carroll commented on TS-1775:
-------------------------------------
I ended up doing most of this for the event loop issue so I'll keep this around
and attach it to that bug when I file it.
> Cleanup of ink_hrtime.{cc,h}
> ----------------------------
>
> Key: TS-1775
> URL: https://issues.apache.org/jira/browse/TS-1775
> Project: Traffic Server
> Issue Type: Improvement
> Reporter: Leif Hedstrom
> Assignee: Alan M. Carroll
> Labels: newbie
> Fix For: 6.2.0
>
>
> A few things comes to mind:
> 1) Why do we have a NEED_HRTIME define? It's always on as far as I can tell,
> and I can't imagine there's a reason to not have it on (it'd completely break
> like everything, in fact it would fail to compile since gethrtime() doesn't
> exist?).
> 2) We should eliminate the USE_TIME_STAMP_COUNTER_HRTIME define, and the code
> that implements our own TSC code. Modern Unix flavors implements this already
> in various way (e.g. glibc's gettimeofday() wrapper has a TSC user space
> implementation).
> 3) On FreeBSD, jpeach points out that CLOCK_REALTIME is probably not the
> optimal way to use clock_gettime(). He suggest using CLOCK_REALTIME_FAST or
> CLOCK_MONOTONIC_FAST which is similar to the optimizations done with TSC for
> gettimeofday() on linux.
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