linux-kernel - Re: Function Profiler broken on today's linux-next

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Message-ID: <20140716184152.GM3016@saruman.home>
Date:	Wed, 16 Jul 2014 13:41:52 -0500
From:	Felipe Balbi <balbi@...com>
To:	Felipe Balbi <balbi@...com>
CC:	Steven Rostedt <rostedt@...dmis.org>, <will.deacon@....com>,
	<mingo@...hat.com>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>
Subject: Re: Function Profiler broken on today's linux-next

Hi,

On Wed, Jul 16, 2014 at 01:29:44PM -0500, Felipe Balbi wrote:
> On Wed, Jul 16, 2014 at 01:24:13PM -0400, Steven Rostedt wrote:
> > On Wed, 16 Jul 2014 11:41:42 -0500
> > Felipe Balbi <balbi@...com> wrote:
> > 
> > 
> > > .config attached. It's actually an ARM platform, I can help out with
> > > testing anything you need.
> > 
> > In that case, can you see if it works under my repo?
> > 
> > git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
> > branch: ftrace/core
> 
> works fine, thanks. FWIW
> 
> Tested-by: Felipe Balbi <balbi@...com>

Actually it seems like it's not counting time properly if I run my test
multiple times in a row:

# /root/testusb -t 1 -c 100000 -s 2048 -a
# head -3 trace_stat/function0
  Function                         Hit    Time                Avg           s^2
  --------                         ---    ----                ---           ---
  thread_interrupt               174876    166120839 us     949.935 us  3048498 us

# /root/testusb -t 1 -c 100000 -s 2048 -a
# head -3 trace_stat/function0
  Function                           Hit       Time                    Avg          s^2
  --------                           ---       ----                    ---          ---
  dwc3_thread_interrupt            286796    967267300 us         4190545199 us     3241109 us 

# /root/testusb -t 1 -c 100000 -s 2048 -a
# head -3 trace_stat/function0
  Function                              Hit      Time                 Avg               s^2
    --------                            ---       ----                 ---              ---
  dwc3_thread_interrupt               401346    642632072 us       1601.192 us     1194316 us 

and so on...

-- 
balbi

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