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From: Theodore Tso <tytso@mit.edu>
To: "Jörn Engel" <joern@logfs.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Arjan van de Ven <arjan@infradead.org>,
	Mike Snitzer <snitzer@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Daniel Walker <dwalker@mvista.com>,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 1/2 v3][RFC] trace: profile likely and unlikely annotations
Date: Thu, 30 Oct 2008 10:55:43 -0400	[thread overview]
Message-ID: <20081030145543.GC14744@mit.edu> (raw)
In-Reply-To: <20081030143238.GB7157@logfs.org>

On Thu, Oct 30, 2008 at 03:32:39PM +0100, Jörn Engel wrote:
> On Wed, 29 October 2008 18:39:55 -0400, Steven Rostedt wrote:
> >
> >    69768    61064  87 __switch_to                    process_64.c         624
> >    15557   115251 100 __switch_to                    process_64.c         594
> >    15555   115227 100 __switch_to                    process_64.c         590
> 
> I may be out of school for a while, but that math sure looks odd.
> 
> > +	if (p->correct) {
> > +		percent = p->incorrect * 100;
> > +		percent /= p->correct;
>                 percent /= p->correct + p->incorect;

And once you do the above fix, I don't think what is below is
necessary any more.  :-)

> > +		/* No need to see huge numbers */
> > +		if (percent > 100)
> > +			percent = 100;

I would also calculate the percent correct rather than the percent
incorrect, on the general theory that 100% good, 0% bad is easier for
my little brain to understand, but that's just a minor thing...

					- Ted

  reply	other threads:[~2008-10-30 14:55 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <170fa0d20810271529g3c64ae89me29ed8b65a9c3b5e@mail.gmail.com>
     [not found] ` <alpine.DEB.1.10.0810271918390.19731@gandalf.stny.rr.com>
     [not found]   ` <20081028001340.GB9797@mit.edu>
2008-10-28  4:12     ` [PATCH][RFC] " Steven Rostedt
2008-10-28  4:23       ` Arjan van de Ven
2008-10-28  4:39       ` Andrew Morton
2008-10-28 14:37       ` Theodore Tso
2008-10-28 14:48         ` Arjan van de Ven
2008-10-28 14:51           ` Steven Rostedt
2008-10-29 16:35             ` [PATCH 1/2 v2][RFC] " Steven Rostedt
2008-10-29 16:38               ` [PATCH 2/2 v2][RFC] ftrace: unlikely annotation tracer Steven Rostedt
2008-10-29 16:40               ` [PATCH 1/2 v2][RFC] trace: profile likely and unlikely annotations Arjan van de Ven
2008-10-29 22:39               ` [PATCH 1/2 v3][RFC] " Steven Rostedt
2008-10-29 22:40                 ` [PATCH 2/2 v3][RFC] ftrace: unlikely annotation tracer Steven Rostedt
2008-10-30 14:32                 ` [PATCH 1/2 v3][RFC] trace: profile likely and unlikely annotations Jörn Engel
2008-10-30 14:55                   ` Theodore Tso [this message]
2008-10-30 15:10                     ` Steven Rostedt
2008-10-28 14:49         ` [PATCH][RFC] " Steven Rostedt
2008-10-28 18:29           ` Theodore Tso
2008-10-28 18:41             ` Steven Rostedt

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