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SubjectRe: Function Profiler broken on today's linux-next
On Wed, 16 Jul 2014 13:41:52 -0500
Felipe Balbi <balbi@ti.com> wrote:

> 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@ti.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@ti.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...
>

Did it use to work? In other words, is this a regression, or just some
another bug?

-- Steve



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