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[Bug translator/10788] -t statistics report on derived statement probes instead of mark probes
- From: "mjw at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 17 Oct 2009 09:34:05 -0000
- Subject: [Bug translator/10788] -t statistics report on derived statement probes instead of mark probes
- References: <20091016124037.10788.mjw@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From mjw at redhat dot com 2009-10-17 09:34 -------
(In reply to comment #2)
> BTW, I saw your comment on IRC about wide timing variance in "probe syscall.*"
> -- if you're using the argstr, I'm not surprised at all that various syscalls
> take different times to compose it. Having more timer-stat granularity would
> allow us to see which ones were particularly high.
Yes, if that was the case, then having more granular statistics would be nice to
have. But in this case you can see the variance even with really simple probes
like: stap -t -e 'probe syscall.* { printf(".") }' -c 'sleep 5'
[... dots ...]
probe syscall.* (<input>:1:1), hits: 1236852, cycles: 440min/533avg/20108max
Maybe this deserves its own bug report if it doesn't exist yet.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=10788
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