* Borislav Petkov <[email protected]> wrote:
> plain 3.19:
>
> 234.681331200 seconds time elapsed
> ( +- 0.15% )
>
> eagerfpu=ENABLE
>
> 234.066525648 seconds time elapsed
> ( +- 0.19% )
hm, a win of more than 600 milliseconds - more than I'd
have expected.
I really want to believe this, but I worry about the
systematic boot-to-boot noise though, which cannot be
eliminated via --repeat 10.
Would it be possible to add a simple runtime debug switch
to switch between the two FPU modes dynamically via a
sysctl?
It should not crash tasks I think if it's flipped around on
a reasonably idle system, so should allow much better
apples-to-apples comparisons with the same kind of page
cache layout, etc.
Thanks,
Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
