Sorry, I forgot to CC the list.
On 07/29/2012 10:26 PM, Rui Han wrote:
Hi,
I used lttng last week and didn't touch it ever since. I am trying to
use it again. I use lttng list -k, it give me error messages:
FATAL: Module lttng_tracer not found.
Error: Unable to load module lttng-tracer
Error: Unable to remove module lttng-tracer
Warning: No kernel tracer available
Error: Unable to list kernel events
I run kernel tracing as root. At first, I thought I have to start the
daemon by lttng-sessiond command. It gave me the error: "Error:
Already running daemon." At this time, I can create session, it gave
"Session session created. Traces will be written in
/root/lttng-traces/session-20120729-160806". However, it failed to
generate a single term of tracing. While I tried lsmod, there are no
lttng related module in the list. Which I remember there were several.
The same thing happened to my two ubuntu systems. I restarted the
system, it still doesn't work. Does any one know how to make lttng
work again in this situation?
Thank you very much.
Best regards,
Rui
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--
Paul Woegerer | SW Development Engineer
Mentor Embedded(tm) | Prinz Eugen Straße 72/2/4, Vienna, 1040 Austria
P 43.1.535991320
Nucleus® | Linux® | Android(tm) | Services | UI | Multi-OS
Android is a trademark of Google Inc. Use of this trademark is subject to
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Linux is the registered trademark of Linus Torvalds in the U.S. and other
countries.
--- Begin Message ---
Hi Pual,
Thank you very much. This does remind me that I updated the kernel several
days ago. I reinstalled the packages and they work just fine.
Cheers,
Rui
On Mon, Jul 30, 2012 at 3:28 AM, Woegerer, Paul <[email protected]>wrote:
> On 07/29/2012 10:26 PM, Rui Han wrote:
>
> Hi,
>
> I used lttng last week and didn't touch it ever since. I am trying to
> use it again. I use lttng list -k, it give me error messages:
>
> FATAL: Module lttng_tracer not found.
> Error: Unable to load module lttng-tracer
> Error: Unable to remove module lttng-tracer
> Warning: No kernel tracer available
> Error: Unable to list kernel events
>
>
> Sounds like the kernel got updated.
> Did you already try to recompile/reinstall the lttng-modules package ?
>
> --
> Paul
>
>
> I run kernel tracing as root. At first, I thought I have to start the
> daemon by lttng-sessiond command. It gave me the error: "Error: Already
> running daemon." At this time, I can create session, it gave "Session
> session created. Traces will be written in
> /root/lttng-traces/session-20120729-160806". However, it failed to generate
> a single term of tracing. While I tried lsmod, there are no lttng related
> module in the list. Which I remember there were several. The same thing
> happened to my two ubuntu systems. I restarted the system, it still doesn't
> work. Does any one know how to make lttng work again in this situation?
>
> Thank you very much.
>
> Best regards,
> Rui
>
>
> _______________________________________________
> lttng-dev mailing
> [email protected]http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>
>
>
> --
> Paul Woegerer | SW Development Engineer
> Mentor Embedded(tm) | Prinz Eugen Straße 72/2/4, Vienna, 1040 Austria
> P 43.1.535991320
> 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.
>
>
--- End Message ---
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