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clock_getres.2: Note that coarse clock need architecture and VDSO support 

Reported-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2016-04-18 16:11:18 +01:00
parent b155912e83
commit c74bc51914
1 changed files with 6 additions and 0 deletions
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6
man2/clock_getres.2
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@ -133,6 +133,9 @@ and NTP.
A faster but less precise version of
.BR CLOCK_REALTIME .
Use when you need very fast, but not fine-grained timestamps.
Requires per-architecture support,
and probably also architecture support for this flag in the
.BR vdso (7).
.TP
.B CLOCK_MONOTONIC
Clock that cannot be set and represents monotonic time since
@ -148,6 +151,9 @@ and NTP.
A faster but less precise version of
.BR CLOCK_MONOTONIC .
Use when you need very fast, but not fine-grained timestamps.
Requires per-architecture support,
and probably also architecture support for this flag in the
.BR vdso (7).
.TP
.BR CLOCK_MONOTONIC_RAW " (since Linux 2.6.28; Linux-specific)"
.\" Added in commit 2d42244ae71d6c7b0884b5664cf2eda30fb2ae68, John Stultz