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Re: stap early exit
- From: fche at redhat dot com (Frank Ch. Eigler)
- To: Jim Keniston <jkenisto at us dot ibm dot com>
- Cc: systemtap <systemtap at sources dot redhat dot com>
- Date: Wed, 09 Apr 2008 22:05:02 -0400
- Subject: Re: stap early exit
- References: <1207788684.3912.15.camel@dyn9047018139.beaverton.ibm.com>
Jim Keniston <jkenisto@us.ibm.com> writes:
> A SystemTap user at IBM is seeing his stap script terminate after a few
> minutes, for no reason that he or I can figure out. The final message
> is:
> stapio:cleanup_and_exit:229 closing control channel
>[...]
> dvhltc@us.ibm.... stapio:cleanup_and_exit:229 closing control channel
> Pass 5: run completed in 50usr/120sys/213446real ms.
Indeed odd. A few things to try to help narrow it down:
- check if the phenomenon reoccurs
- check if it's a regular time interval
- change the "flag[tid()] = 0" to "delete flag[tid()]"
- try removing the print_backtrace() calls
- run with "stap -t"
- check whether any probes were skipped
- see whether the stap* processes may have operated under some
resource limit like cpu time
- try bumping up buffer size
- FChE