micke <[EMAIL PROTECTED]> wrote:
micke> Thanks for the answer, but thats in libc? The functionality I search
for is in the kernel.
micke> Found this myself:
micke>
http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/syscall/lwp_sobj.c
micke> The function lwp_block() have a sleepq_insert(&sqh->sq_queue, t);
function that seems promising.
micke> So is this correct? When a lwp/kthread gets blocked this function is
the one called? So If I want to know the time when the thread gets inserted in
the sleep queue, I just check it before the call to the
sleepq_insert(&sqh->sq_queue, t) function?
micke> Thanks
Micke,
you can use stable DTrace sched provider probes called sleep and wakeup.
They guarantee you that the timing you obtain will be correct
independent of implementation. Otherwise you need to check all the
places where sleep/wakeup probes are fired.
- akolb
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