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[Bug uprobes/17623] Sometimes probes fail to fire events when running against a multi-threaded application
- From: "peter at peca dot dk" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Thu, 20 Nov 2014 07:54:05 +0000
- Subject: [Bug uprobes/17623] Sometimes probes fail to fire events when running against a multi-threaded application
- Auto-submitted: auto-generated
- References: <bug-17623-6586 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=17623
--- Comment #4 from Peter Allin <peter at peca dot dk> ---
Aha. When I let perf start the test program, like this:
perf stat -e probe_testprog:func1 -e probe_testprog:func2 -a timeout 1s
./testprog
The counts are equal (+/- 1 of course).
This make the SystemTap problem and the perf problem look like the same.
Pointing towards the kernel I suppose?
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