> Date: Fri, 18 Nov 2022 10:06:19 +0000 > From: nia <n...@netbsd.org> > > This is neat, thanks for the work. Do we need a kernel > compiled with any specific options to make the DTrace > probes active?
Just `options KDTRACE_HOOKS', which is on by default in x86 and arm GENERIC kernels. dtrace itself, and the various probes, are in modules: dtrace.kmod dtrace_fbt.kmod dtrace_lockstat.kmod dtrace_profile.kmod (must be loaded explicitly for tick-1s &c.) dtrace_sdt.kmod dtrace_syscall.kmod dtrace(1) will autoload the module dtrace_FOO.kmod when you try to set a probe on FOO:*:*:* like fbt::hardclock:entry. For the tick-1s, tick-10s, &c. probes, you need to load dtrace_profile.kmod explicitly.
