From owner-freebsd-hackers@freebsd.org  Wed Aug 26 20:41:28 2015
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Date: Wed, 26 Aug 2015 23:41:25 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: Stanislav Sedov <stas@freebsd.org>
Cc: freebsd-hackers@FreeBSD.org
Subject: Re: How to application sample profiling?
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On Wed, Aug 26, 2015 at 01:25:25PM -0700, Stanislav Sedov wrote:

> 
> > On Aug 23, 2015, at 3:13 PM, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote:
> > 
> > I have multi-thread application fully utilise all CPU cores.
> > I am need to determine lines give mostly CPU loads.
> > How I can do this?
> > 
> > `pmcstat -P BU_CPU_CLK_UNHALTED -t application_pid -n 500000 -O sample.out`
> > consume to many CPU (performance drop x100 times) and mostly show
> > himself in kernel and pmc locks and none for application.
> > pmcstat -S BU_CPU_CLK_UNHALTED -- same here.
> > 
> 
> Did you try something like `pmcstat -S instructions -T` by any chance?
> That should give some quick clues as to which functions are being hot
> at least.

I am try '-S instructions' w/o -T, no difference.

> Which FreeBSD version are you using by the way?

10-STABLE