linux-kernel - Re: [REPOST PATCH] ftrace: Remove the unused variant ftrace_update

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Message-ID: <20150915160046.GA14393@t440s.lenovo>
Date:	Wed, 16 Sep 2015 00:00:46 +0800
From:	Minfei Huang <mnfhuang@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Minfei Huang <mhuang@...hat.com>, mingo@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [REPOST PATCH] ftrace: Remove the unused variant
 ftrace_update_time

On 09/15/15 at 11:50am, Steven Rostedt wrote:
> On Tue, 15 Sep 2015 23:37:39 +0800
> Minfei Huang <mnfhuang@...il.com> wrote:
> 
>  
> > I think the variant ftrace_update_time is not used any more. Previously,
> > it is used to print the time how long ftrace will spend to update the
> > code in fucntion ftraced. 
> 
> Yes, I know what it measures. It's been on my todo list to export that
> out to userspace, as it is an interesting metric.
> 

Export the time which ftrace spent to update the all of the function?
How about exporting the time ftrace spent in latest time?

Thanks
Minfei

> > 
> > > 
> > > Maybe add it to the dyn_ftrace_total_info file?
> > > 
> > 
> > This file only uses the variant ftrace_update_tot_cnt which is stored
> > the updated function number.
> 
> But we can add to that file with a space delimited output.
> 
> -- Steve
> 
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