----- On Mar 13, 2018, at 6:48 AM, THEUNISSEN Rolf rolf.theunis...@altran.com
wrote:
> Hi,
>
> I am currently tracing many processes with LTTng-UST on a system under heavy
> load, with 2 CPUs.
>
> The traces seem to be missing ust-events near the end of a trace. After doing
> some analysis, it seems that events are missing from the other CPU then the
> process exits on. More concretely:
>
> During the lifetime of a process:
> - Process X executes on CPU 0,1: all events are in the trace
> Just before the process is about to exit:
> - Process X executes on CPU 0: missing events from the trace
> A few mili-seconds later:
> - Process X executes on CPU1 and exits: The last events are in the trace
>
> Is this behavior expected, or am I running into an LTTng-UST bug? And would
> there be any workaround?
Can you provide more information about the tracing configuration you are using ?
How is the session created ?
Which versions of lttng-{tools,ust} and babeltrace do you use ? Are there any
discarded events in the trace reported by babeltrace ?
If you could provide the resulting trace, it would also be helpful.
Thanks,
Mathieu
>
> Kind regards,
> Rolf Theunissen
>
>
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--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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