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SubjectRe: [PATCH] x86: Run checksumming in parallel accross multiple alu's
On Tue, Oct 29, 2013 at 02:11:49PM +0100, Ingo Molnar wrote:
>
> * Neil Horman <nhorman@tuxdriver.com> wrote:
>
> > I'm sure it worked properly on my system here, I specificially
> > checked it, but I'll gladly run it again. You have to give me an
> > hour as I have a meeting to run to, but I'll have results shortly.
>
> So what I tried to react to was this observation of yours:
>
> > > > Heres my data for running the same test with taskset
> > > > restricting execution to only cpu0. I'm not quite sure whats
> > > > going on here, but doing so resulted in a 10x slowdown of the
> > > > runtime of each iteration which I can't explain. [...]
>
> A 10x slowdown would be consistent with not running your testcase
> but 'perf bench sched messaging' by accident, or so.
>
> But I was really just guessing wildly here.
>
> Thanks,
>
> Ingo
>
Ok, well, I'll run it again in just a bit here.
Neil



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