Re: [PATCH] Add slowpath enter/exit trace events

[peter enderborg]

On 11/23/2017 02:43 PM, Tetsuo Handa wrote:
> Please see my attempt at
> http://lkml.kernel.org/r/1510833448-19918-1-git-send-email-penguin-kernel@xxxxxxxxxxxxxxxxxxx .
> Printing just current thread is not sufficient for me.
>
>
Seems to  me that it is a lot more overhead with timers and stuff.
My probe is for the health of the system trying to capture how get the penalty and how much. A slowpath alloc in a audio stream can causes drop-outs. And they are very hard to debug in userspace.