On 09/10/2012 05:39 PM, Woegerer, Paul wrote:
On 09/10/2012 05:00 PM, David Goulet wrote:
With more options here to set either a custom destination or live
trace. What's the default? (no opts given). I would personally go for
a default one being to record in the session default trace files and
add a "-l" for the live.
-o, --output=DST
-l, --live
Add a domain option where nothing enables kernel AND ust or else the
command can take either -u or -k.
Please, contribute to this, no bad ideas, only bad answers! :)
While sleeping over it two more things came to my mind:
*) The exit status of the <command> that gets trace-executed with "lttng
trace <command> [<options>]" would need to be forwarded to the exit
status of the wrapping lttng. This would allow users to use "lttng
trace" as a drop-in replacement in contexts where the return value of
the invoked <command> cannot be ignored.
*) There should be something like "-q [<logfile>], --quiet [<logfile>]"
where the output of the traced <command> does not get mixed with lttng
info/debug/error output. If the optional <logfile> is given all lttng
relevant communication should go into the <logfile>.
Example without --quiet:
Session met-2012-09-11_09-08-30 created.
Traces will be written in
/home/pwoegere/lttng-traces/met-2012-09-11_09-08-30-20120911-090830
UST channel met_tools enabled for session met-2012-09-11_09-08-30
UST event met_func:* created in channel met_tools
UST event met_call:* created in channel met_tools
Error: Events: Tracing the kernel requires a root lttng-sessiond
daemon and "tracing" group user membership (channel channel0, session
met-2012-09-11_09-08-30)
Tracing started for session met-2012-09-11_09-08-30
Solved
MultiThread done...
delta 131673329
Tracing stopped for session met-2012-09-11_09-08-30
Session met-2012-09-11_09-08-30 destroyed
Example with --quiet
Solved
MultiThread done...
delta 131673329
--
PaulW
--
Paul Woegerer | SW Development Engineer
http://go.mentor.com/sourceryanalyzer
Mentor Embedded(tm) | Prinz Eugen Straße 72/2/4, Vienna, 1040 Austria
Nucleus® | Linux® | Android(tm) | Services | UI | Multi-OS
Android is a trademark of Google Inc. Use of this trademark is subject to
Google Permissions.
Linux is the registered trademark of Linus Torvalds in the U.S. and other
countries.
_______________________________________________
lttng-dev mailing list
lttng-dev@lists.lttng.org
http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
