Curious question. How much is the slowdown of Callgrind over Cachegrind?
How does the slowdown change with larger programs?
On 27 November 2012 08:39, Josef Weidendorfer <josef.weidendor...@gmx.de>wrote:
> Am 27.11.2012 08:48, schrieb Geoff Alexander:
> > Josef Weidendorfer <josef.weidendor...@gmx.de> wrote on 11/19/2012
> > > I just fixed that bug in SVN trunk.
> >
> > I tested with both Valgrind 3.8.1 and Valgrind SVN-13143 as well as
> > retesting with the Valgrind 3.6.1 that comes with openSUSE 12.1. The
> > SVN version appears to fix the problem as the Cachegrind and Callgrind
> > instruction counts now only differ by 3 out of over 8.9 billion.
>
> Very good.
> These small changes probably are about nondeterminism regarding
> system calls, as said in the old mail.
>
> > Thanks for fixing the problem.
>
> And vice versa. While PLT code is probably not important for performance
> analysis in most cases (and that's the reason the bug did not came up
> yet), this difference worried me.
>
> So, thanks for the confirmation that it actually was the bug I fixed!
>
> Josef
>
>
>
>
> >
> > Geoff Alexander, Ph.D.
> > Software Engineer, Corporate Tools Development
> > IBM Corporation
> > RTP, NC
>
>
>
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