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[Bug libfortran/15516] assembly snippets for nano second resolution wall clock time
- From: "Helge dot Avlesen at bccs dot uib dot no" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 12 Feb 2007 10:03:24 -0000
- Subject: [Bug libfortran/15516] assembly snippets for nano second resolution wall clock time
- References: <bug-15516-8569@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from Helge dot Avlesen at bccs dot uib dot no 2007-02-12 10:03 -------
Subject: Re: assembly snippets for nano second resolution wall clock time
"jv244 at cam dot ac dot uk" <gcc-bugzilla@gcc.gnu.org> writes:
> is this comment about get_clockfreq.o actually correct ? I find it returns
> different values depending on the load of the machine (I guess this is
> frequency rescaling at work, i.e.):
yup, it is rescaling. should be turned off if you want reliable high
res measurements.
Helge
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15516