Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's

From: Ingo Molnar
Date: Tue Oct 29 2013 - 04:25:55 EST

* Neil Horman <nhorman@xxxxxxxxxxxxx> wrote:

> 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. As before however, both the
> parallel alu run and the prefetch run resulted in speedups, but
> the two together were not in any way addative. I'm going to keep
> playing with the prefetch stride, unless you have an alternate
> theory.

Could you please cite the exact command-line you used for running
the test?


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