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Re: [PATCH] benchtests/Makefile: Run the string benchmarks four times by default.
- From: Siddhesh Poyarekar <siddhesh at redhat dot com>
- To: Will Newton <will dot newton at linaro dot org>
- Cc: libc-alpha at sourceware dot org, patches at linaro dot org
- Date: Thu, 5 Sep 2013 16:01:19 +0530
- 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>
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.
I wonder if this would make a lot of difference. On an otherwise idle
system (which is essentially a pre-condition for benchmark runs), I
would expect more or less similar page placement (i.e. reachable via
comparable indices) for consecutive executions of a program. You
would probably need to have something spawned in parallel to actually
make a difference.
Siddhesh