[lttng-dev] Error using add-context for perf counters

[Bernd Hufmann]

Hello

I cannot add contexts for perf counters using lttng-tools v2.1.1 and I 
get an error (see below). When using lttng-tools 2.0.5 (on a different 
computer) it works. Could somebody from lttng development team look into 
that?

Thanks
Bernd

----------------------------------------------------------------------
 > lttng create mySession
Session mySession created.
Traces will be written in /home/bernd/lttng-traces/mySession-20130319-145021

 > lttng enable-event -a -k
All kernel events are enabled in channel channel0

 > lttng add-context -k -t perf:branch-misses -t perf:cache-misses
PERROR: add context ioctl: Invalid argument [in 
kernel_add_channel_context() at kernel.c:47]
Error: perf:cache-misses: Add kernel context failed
PERROR: add context ioctl: Invalid argument [in 
kernel_add_channel_context() at kernel.c:47]
Error: perf:branch-misses: Add kernel context failed
Warning: Some command(s) went wrong

-----------------------------------------------------------------------
My setup is:
Ubuntu 12.04 with kernel 3.2.0-38
lttng-modules v2.1.1
lttng-tools v2.1.1



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