The cyclictest's manpage references CLOCK_MONOTONIC and CLOCK_REALTIME multiple times without providing a relevant description or reference. Reference clock_getres(2) where such clocks are extensively described. Pick the Linux version, instead of the POSIX (3p) one, as the former has details that are relevant to cyclictest's "--secaligned" implementation; i.e., Linux's CLOCK_MONOTONIC starts from 0. Signed-off-by: Ahmed S. Darwish <darwi@xxxxxxxxxxxxx> --- src/cyclictest/cyclictest.8 | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/cyclictest/cyclictest.8 b/src/cyclictest/cyclictest.8 index 6982234..12fb9c1 100644 --- a/src/cyclictest/cyclictest.8 +++ b/src/cyclictest/cyclictest.8 @@ -100,11 +100,15 @@ Obsolete option. Please use \-\-default\-system instead. . .TP .B \-c, \-\-clock=CLOCK -select clock +Select the system clock to be used for calculating the measuring thread's +latency. Allowed CLOCK values are: .br 0 = CLOCK_MONOTONIC (default) .br 1 = CLOCK_REALTIME +.br +For more information on the Linux implementation of such clocks, check +.MR clock_getres 2 . .TP .B \-x, \-\-posix_timers -- 2.49.0
