On Thu, Jun 25 2020 11:36:48 +0200, Martin Pieuchot wrote: > On 23/06/20(Tue) 12:04, Yuichiro NAITO wrote: > > Current btrace has `interval:hz:1` probe that makes periodically events. > > `interval:hz:1` looks to make events once per second (= 1Hz), > > but current implementation makes once per tick (= 100Hz on amd64). > > I think the interval should be counted by reciprocal of ticks so that fit > > to Hz. > > Indeed the current implementations assumes it's a number of ticks. How > does other tracing tool behave? Is the behavior you suggest similar to > bpftrace(8) or dtrace(1)?
In DTrace, profile-<n> probes fire at a frequency of <n> hertz, but apparently also support suffixes. http://dtrace.org/guide/chp-profile.html -- Lauri Tirkkonen | lotheac @ IRCnet
