This is the mail archive of the
mailing list for the Cygwin project.
Re: Profiling with GPROF considered buggy?
- To: "Carsten Thorenz" <XZ550S at gmx dot de>, <cygwin at cygwin dot com>
- Subject: Re: Profiling with GPROF considered buggy?
- From: "Tim Prince" <tprince at computer dot org>
- Date: Mon, 27 Aug 2001 14:49:33 -0700
- References: <email@example.com>
I thought that most linux implementations had the same timer resolution as Win2K installations. I don't know that anyone has
considered the implications of gprof on WIn9x.
----- Original Message -----
From: "Carsten Thorenz" <XZ550S@gmx.de>
Sent: Monday, August 27, 2001 6:37 AM
Subject: Re: Profiling with GPROF considered buggy?
> Hi Tim!
> Tim Prince wrote:
> > Unless I am mistaken, cygwin doesn't include any libraries built with -pg.
> > When I wish to profile with g77, I build a copy of
> > libg2c with -pg as well as building all my code with -pg. When
> > I profile numerical code built with gcc, I use a mathinline.h as well
> > as a few of my own math functions to avoid spending much time in the
> newlib libm.
> I'm using standard ANSI-C, no libraries are linked in right now.
> What seems strange to me is that the behaviour of the profiler is _so_
> different when used under Linux, OS/2 or on completely other platforms
> (I tried HPUX, too). Ok, on HPUX the results differ, because it is a
> completely different machine, but at least the tendencies are the
> same for all of the above and provide very useful information. Not
> so with Cygwin or Mingw.
> > I can't tell from your message which language you
> > are using or whether you expect all the time to be spent in your own -pg
> compiled code.
> As I wrote previously: The program doesn't communicate much.
> It doesn't use libraries. It simply crunches numbers, but some
> of the CPU-intensive functions do not appear in the profile. Again my
> guess: The time spent in each of these functions for a single call is
> very short, but they are called _many, many_ times. Maybe the timer
> is too bad to catch this?
> GMX - Die Kommunikationsplattform im Internet.
> Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
> Bug reporting: http://cygwin.com/bugs.html
> Documentation: http://cygwin.com/docs.html
> FAQ: http://cygwin.com/faq/
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Bug reporting: http://cygwin.com/bugs.html