On 11-08-27 05:32 AM, Zvi Vered wrote:
Hello,
Currently I'm using vanilla 2.6.27.35
1. What patch should I use ? There is no patch for 2.6.27.35
2.6.27 is quite old, and so is the matching LTTng version. If you have
to stay on that version, then the best bet is probably LTTng 0.72, the
latest one for 2.6.27.x
Check the compatibility list too, it might also require older versions
of ltt-control and LTTV.
2. If I use a patched kernel, can I report events from user space and
see them on a graph ?
If you take a *kernel* trace (using lttctl), you will see events coming
from userspace applications (like system calls) and those will show in
the control flow view. But if you instrument your own application with
UST and take a UST trace (with ustctl), those traces do not populate the
control/resource views in LTTV, yet.
Thanks,
Zvika.
----- Original Message ----- From: "Alexandre Montplaisir"
<[email protected]>
To: "Zvi Vered" <[email protected]>
Cc: <[email protected]>
Sent: Saturday, August 27, 2011 4:48
Subject: Re: [ltt-dev] lttv-gui: using the graph to see events
On 11-08-26 06:06 PM, Zvi Vered wrote:
Hello,
I'm using ust-0.15.
I ran hello,hello2 contained in tests folder using usttrace.
Then I added the trace to lttv-gui.
Do you have a test code where I can see events or tracepoints on the
graph ?
Till now I managed to see events only in a list at the bottom of the
gui.
Thanks,
Zviak.
Hi Zviak,
This is normal. The state system in LTTV only handles kernel traces
for now. When displaying UST traces, the control flow and resource
views will be empty.
There are plans on the mid/long-term roadmap to come up with a
generic way to define "state changes" for UST tracepoints. This will
ultimately allow any application instrumented with UST to display its
own resources and control flow.
Regards,
--
Alexandre Montplaisir
DORSAL lab,
ֹcole Polytechnique de Montrיal
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