First of all, that worked. Thank you.
So let's suppose I only want to track a handful of system calls, what's
the most efficient way to filter out everything else?
Loris
On 5/4/2012 9:42 PM, Julien Desfossez wrote:
Hi,
On 05/05/12 12:14 AM, Loris Degioanni wrote:
I just installed the lttng package on a fresh Ubuntu 12 machine, and I'm
following the tutorial at http://lttng.org/quickstart.
The enable-event step fails with this error:
# lttng enable-event sched_switch,sys_open -k
kernel event sched_switch created in channel channel0
Error: Event sys_open: Enable kernel event failed (channel channel0,
session mysession)
Warning: Some command(s) went wrong
What am I doing wrong?
As of now, you can't enable system calls tracing one by one (sys_open is
a system call), it's either all of them or none.
So if you want sched_switch and all the syscalls you have to do :
lttng enable-event -k sched_switch
lttng enable-event -k --syscall -a
Have fun,
Julien
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