dtrace discuss - Oct 2005 - RFE: sched probe that fires when an lwp is stopped

A thread running in the RT sched class is still subject to being stopped
(holdlwps()) if some other thread in its process calls vfork(2) (e.g.,
system(3c)). Additionally, some of the p-tools (pfiles(1), pldd(1),
pstack(1)) will also stop a process (procfs:pr_stop) as well.

I''ve debugged issues with broken real-time commitments due to buggy
code
calling vfork(2) or to a testing framework using one of the above p-tools.

What I would find useful would be for a sched probe, or perhaps a proc
probe, that would fire anytime a process/lwp is stopped. I''ve mentioned
two
possible ways but I would guess that there may be more. This type of probe
would be useful in discovering coding practices that inadvertantly end up
stopping a process/lwp.

Thanks in advance for your time,


--Marc
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://mail.opensolaris.org/pipermail/dtrace-discuss/attachments/20050930/9f6a7644/attachment.html>