[lttng-dev] lttng start error

[Jérémie Galarneau]

On Thu, May 30, 2013 at 12:32 PM, Zheng Da <zhengda1936 at gmail.com> wrote:
> Hello,
>
> I just started to use lttng. I use Ubuntu 12.04 and the kernel version
> 3.8.12. I use a customized kernel, so the lttng package in ubuntu
> can't be installed correctly. I built lttng 2.0 myself.

Did you build only the lttng-modules or the complete toolchain
(lttng-tools, lttng-ust, lttng-modules)? Which versions of the
different packages are you using?

Thanks,
Jérémie

>
> Then I followed the steps in https://lttng.org/quickstart. When I run
> lttng start, I got the errors:
> root at ubuntu:~# lttng start
> PERROR: sendmsg: Bad file descriptor [in lttcomm_send_unix_sock() at
> sessiond-comm.c:311]
> PERROR: send consumer channel: Bad file descriptor [in
> send_kconsumer_session_streams() at main.c:636]
> PERROR: ioctl start session: No buffer space available [in
> kernel_start_session() at kernel.c:397]
> Error: Starting kernel trace failed
>
> Someone said in the mailing list that this problem may have something
> to do with memory limit. But it shouldn't be my case as my machine has
> 512GB memory.
>
> Can anyone help me troubleshoot the problem?
>
> Thanks,
> Da
>
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-- 
Jérémie Galarneau
EfficiOS Inc.
http://www.efficios.com