* [ltt-dev] UST manual
@ 2011-02-22 6:45 Amir
2011-02-22 6:45 ` Amir
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Amir @ 2011-02-22 6:45 UTC (permalink / raw)
Hi,
I'm really new to UST and generating user-space traces for software systems.
I followed the instruction provided at:
http://lttng.org/files/ust/manual/ust.html
Packages were successfully installed and I could generate a trace following
the provided example for markers.
Still I have a few questions for which I couldn?t find answers in the
manual.
- what are 'event categories' and 'channels'?
- is it possible to generate a method call trace using markers? would it
work just for C applications?
- it seems like 'Appendix x' is missing, how would it be possible to
have some information about the formatting
Thanks,
Amir
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^ permalink raw reply [flat|nested] 6+ messages in thread* [ltt-dev] UST manual
2011-02-22 6:45 [ltt-dev] UST manual Amir
@ 2011-02-22 6:45 ` Amir
2011-02-22 6:45 ` Amir
2011-02-28 22:21 ` Matthew Khouzam
2 siblings, 0 replies; 6+ messages in thread
From: Amir @ 2011-02-22 6:45 UTC (permalink / raw)
Hi,
I'm really new to UST and generating user-space traces for software systems.
I followed the instruction provided at:
http://lttng.org/files/ust/manual/ust.html
Packages were successfully installed and I could generate a trace following
the provided example for markers.
Still I have a few questions for which I couldn?t find answers in the
manual.
- what are 'event categories' and 'channels'?
- is it possible to generate a method call trace using markers? would it
work just for C applications?
- it seems like 'Appendix x' is missing, how would it be possible to
have some information about the formatting
Thanks,
Amir
-------------- next part --------------
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* [ltt-dev] UST manual
2011-02-22 6:45 [ltt-dev] UST manual Amir
2011-02-22 6:45 ` Amir
@ 2011-02-22 6:45 ` Amir
2011-02-28 22:21 ` Matthew Khouzam
2 siblings, 0 replies; 6+ messages in thread
From: Amir @ 2011-02-22 6:45 UTC (permalink / raw)
Hi,
I'm really new to UST and generating user-space traces for software systems.
I followed the instruction provided at:
http://lttng.org/files/ust/manual/ust.html
Packages were successfully installed and I could generate a trace following
the provided example for markers.
Still I have a few questions for which I couldn?t find answers in the
manual.
- what are 'event categories' and 'channels'?
- is it possible to generate a method call trace using markers? would it
work just for C applications?
- it seems like 'Appendix x' is missing, how would it be possible to
have some information about the formatting
Thanks,
Amir
-------------- next part --------------
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [ltt-dev] UST manual
2011-02-22 6:45 [ltt-dev] UST manual Amir
2011-02-22 6:45 ` Amir
2011-02-22 6:45 ` Amir
@ 2011-02-28 22:21 ` Matthew Khouzam
2011-02-28 22:21 ` Matthew Khouzam
2011-02-28 22:21 ` Matthew Khouzam
2 siblings, 2 replies; 6+ messages in thread
From: Matthew Khouzam @ 2011-02-28 22:21 UTC (permalink / raw)
On 11-02-22 01:45 AM, Amir wrote:
> Hi,
> I'm really new to UST and generating user-space traces for software
> systems.
> I followed the instruction provided at:
> http://lttng.org/files/ust/manual/ust.html
> Packages were successfully installed and I could generate a trace
> following the provided example for markers.
> Still I have a few questions for which I couldn?t find answers in the
> manual.
> - what are 'event categories' and 'channels'?
A channel is as it's name indicates a way to communicate with UST. In
the trace, each channel has N files allocated to it where N is the
number of cores you have. Each channel also has a certain amount of
memory allocated to to. I tend to only use the channel "UST" as it makes
my life easier, but then again, I am a very bad person who's been caught
doing unsavory things to programs for a long while and that says 640k
ought to be enough for anybody without signs of irony.
Perhaps someone more knowledgeable in UST can show me the error in my ways.
> - is it possible to generate a method call trace using markers? would
> it work just for C applications?
You mean like "
void trace_result( int n ) {
trace_mark( ust, myevent, "%d" ,n);
}" ?
Yes, it's what I do... look into tracepoints though, you're halfway
there with that.
> - it seems like 'Appendix x' is missing, how would it be possible to
> have some information about the formatting
>
I think Appendix X was a placeholder, not sure, I didn't write it ;) .
> Thanks,
> Amir
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^ permalink raw reply [flat|nested] 6+ messages in thread* [ltt-dev] UST manual
2011-02-28 22:21 ` Matthew Khouzam
@ 2011-02-28 22:21 ` Matthew Khouzam
2011-02-28 22:21 ` Matthew Khouzam
1 sibling, 0 replies; 6+ messages in thread
From: Matthew Khouzam @ 2011-02-28 22:21 UTC (permalink / raw)
On 11-02-22 01:45 AM, Amir wrote:
> Hi,
> I'm really new to UST and generating user-space traces for software
> systems.
> I followed the instruction provided at:
> http://lttng.org/files/ust/manual/ust.html
> Packages were successfully installed and I could generate a trace
> following the provided example for markers.
> Still I have a few questions for which I couldn?t find answers in the
> manual.
> - what are 'event categories' and 'channels'?
A channel is as it's name indicates a way to communicate with UST. In
the trace, each channel has N files allocated to it where N is the
number of cores you have. Each channel also has a certain amount of
memory allocated to to. I tend to only use the channel "UST" as it makes
my life easier, but then again, I am a very bad person who's been caught
doing unsavory things to programs for a long while and that says 640k
ought to be enough for anybody without signs of irony.
Perhaps someone more knowledgeable in UST can show me the error in my ways.
> - is it possible to generate a method call trace using markers? would
> it work just for C applications?
You mean like "
void trace_result( int n ) {
trace_mark( ust, myevent, "%d" ,n);
}" ?
Yes, it's what I do... look into tracepoints though, you're halfway
there with that.
> - it seems like 'Appendix x' is missing, how would it be possible to
> have some information about the formatting
>
I think Appendix X was a placeholder, not sure, I didn't write it ;) .
> Thanks,
> Amir
-------------- next part --------------
An HTML attachment was scrubbed...
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^ permalink raw reply [flat|nested] 6+ messages in thread* [ltt-dev] UST manual
2011-02-28 22:21 ` Matthew Khouzam
2011-02-28 22:21 ` Matthew Khouzam
@ 2011-02-28 22:21 ` Matthew Khouzam
1 sibling, 0 replies; 6+ messages in thread
From: Matthew Khouzam @ 2011-02-28 22:21 UTC (permalink / raw)
On 11-02-22 01:45 AM, Amir wrote:
> Hi,
> I'm really new to UST and generating user-space traces for software
> systems.
> I followed the instruction provided at:
> http://lttng.org/files/ust/manual/ust.html
> Packages were successfully installed and I could generate a trace
> following the provided example for markers.
> Still I have a few questions for which I couldn?t find answers in the
> manual.
> - what are 'event categories' and 'channels'?
A channel is as it's name indicates a way to communicate with UST. In
the trace, each channel has N files allocated to it where N is the
number of cores you have. Each channel also has a certain amount of
memory allocated to to. I tend to only use the channel "UST" as it makes
my life easier, but then again, I am a very bad person who's been caught
doing unsavory things to programs for a long while and that says 640k
ought to be enough for anybody without signs of irony.
Perhaps someone more knowledgeable in UST can show me the error in my ways.
> - is it possible to generate a method call trace using markers? would
> it work just for C applications?
You mean like "
void trace_result( int n ) {
trace_mark( ust, myevent, "%d" ,n);
}" ?
Yes, it's what I do... look into tracepoints though, you're halfway
there with that.
> - it seems like 'Appendix x' is missing, how would it be possible to
> have some information about the formatting
>
I think Appendix X was a placeholder, not sure, I didn't write it ;) .
> Thanks,
> Amir
-------------- next part --------------
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2011-02-22 6:45 [ltt-dev] UST manual Amir
2011-02-22 6:45 ` Amir
2011-02-22 6:45 ` Amir
2011-02-28 22:21 ` Matthew Khouzam
2011-02-28 22:21 ` Matthew Khouzam
2011-02-28 22:21 ` Matthew Khouzam
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