On Tue, 16 Oct 2007, micke wrote:
> Hi, thanks, the DTRACE_SCHED(sleep) is exactly where I want to capture the
> time. Haven't had the time to read throw the dtrace book yet, but is it
> possible to extract this value? in kernel-space? also in user-space?
In userspace, the simplest way to see these events would be:
dtrace -n "sched:::sleep {}"
To hook this into a program of your own, libdtrace could be used, with a
small consumer the style of truss or lockstat, see sources of these
programs.
I don't know if there is a way to create DTrace "kernel consumers". If you
need synchronous notification/action, then the DTrace consumer mechanism
isn't appropriate anyway, as DTrace will buffer the events for you and
deliver 'when asked' (i.e. when the consumer reads the dtrace device).
FrankH.
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