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Re: [PATCH] benchtests/Makefile: Run the string benchmarks four times by default.
- From: OndÅej BÃlka <neleai at seznam dot cz>
- To: Will Newton <will dot newton at linaro dot org>
- Cc: libc-alpha <libc-alpha at sourceware dot org>, Patch Tracking <patches at linaro dot org>
- Date: Wed, 4 Sep 2013 18:52:11 +0200
- Subject: Re: [PATCH] benchtests/Makefile: Run the string benchmarks four times by default.
- Authentication-results: sourceware.org; auth=none
- References: <52274838 dot 7010902 at linaro dot org> <20130904161743 dot GA10358 at domone dot kolej dot mff dot cuni dot cz> <CANu=DmiVWFijri_iMjFGJEWdTWheHbBFOH8XULURRE8pLMkuLA at mail dot gmail dot com>
On Wed, Sep 04, 2013 at 05:20:23PM +0100, Will Newton wrote:
> On 4 September 2013 17:17, OndÅej BÃlka <neleai@seznam.cz> wrote:
> > On Wed, Sep 04, 2013 at 03:48:24PM +0100, Will Newton wrote:
> >>
> >> The string benchmarks can be affected by physical page placement, so
> >> running them multiple times is required to account for this. Also
> >> backup the results of the previous run like is done for the other
> >> benchmarks.
> >>
> > You do not need to do this. We should instead randomize addresses used
> > which handles this problem.
>
> That seems like it would be considerably more complicated. Do you have
> a reason why your approach is better?
>
It does not matter if it is complicated, it is required to get
reasonable results.