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Date:   Fri, 24 Nov 2017 08:43:47 +0100
From:   peter enderborg <>
To:     Tetsuo Handa <>,
        Mel Gorman <>,
        Michal Hocko <>
CC:     <>, <>,
        Steven Rostedt <>,
        Ingo Molnar <>,
        Alex Deucher <>,
        "David S . Miller" <>,
        Harry Wentland <>,
        Greg Kroah-Hartman <>,
        Tony Cheng <>,
        Andrew Morton <>,
        Vlastimil Babka <>,
        Johannes Weiner <>,
        Pavel Tatashin <>
Subject: Re: [PATCH] Add slowpath enter/exit trace events

On 11/23/2017 02:43 PM, Tetsuo Handa wrote:
> Please see my attempt at
> .
> 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.

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