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clock_getres.2: Document CLOCK_REALTIME_COARSE and CLOCK_MONOTONIC_COARSE 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Cyril Hrubis 2013-02-25 09:32:22 +01:00 committed by Michael Kerrisk
parent a780f17be1
commit 55f749ae91
1 changed files with 12 additions and 1 deletions
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13
man2/clock_getres.2
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@ -29,7 +29,7 @@
.\"
.\" FIXME: Linux 2.6.39 adds CLOCK_BOOTTIME
.\"
.TH CLOCK_GETRES 2 2012-11-07 "" "Linux Programmer's Manual"
.TH CLOCK_GETRES 2 2013-02-25 "" "Linux Programmer's Manual"
.SH NAME
clock_getres, clock_gettime, clock_settime \- clock and time functions
.SH SYNOPSIS
@ -129,6 +129,12 @@ This clock is affected by discontinuous jumps in the system time
and by the incremental adjustments performed by
.BR adjtime (3)
and NTP.
.BR CLOCK_REALTIME_COARSE " (since Linux 2.6.32; Linux-specific)"
.\" Added in commit da15cfdae03351c689736f8d142618592e3cebc3
Faster but less precise version of
.BR CLOCK_REALTIME.
Use when you need very fast, but not fine-grained timestamps.
.TP
.TP
.B CLOCK_MONOTONIC
Clock that cannot be set and represents monotonic time since
@ -138,6 +144,11 @@ This clock is not affected by discontinuous jumps in the system time
but is affected by the incremental adjustments performed by
.BR adjtime (3)
and NTP.
.BR CLOCK_MONOTONIC_COARSE " (since Linux 2.6.32; Linux-specific)"
.\" Added in commit da15cfdae03351c689736f8d142618592e3cebc3
Faster but less precise version of
.BR CLOCK_MONOTONIC.
Use when you need very fast, but not fine-grained timestamps.
.TP
.BR CLOCK_MONOTONIC_RAW " (since Linux 2.6.28; Linux-specific)"
.\" Added in commit 2d42244ae71d6c7b0884b5664cf2eda30fb2ae68, John Stultz