Messages in this thread | | | From | Robert Jarzmik <> | Subject | Re: [PATCH] optimize ktime_divns for constant divisors | Date | Wed, 03 Dec 2014 21:16:27 +0100 |
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Nicolas Pitre <nicolas.pitre@linaro.org> writes:
> Let ktime_divns() use do_div() inline whenever the divisor is constant > and small enough. This will make things like ktime_to_us() and > ktime_to_ms() much faster.
Hi Nicolas,
I suppose the "small enough" is linked to the "!(div >> 32)" in your patch. Can I have the rationale which brought up this value, and if that value is universal across architectures (ie. x86/ppc/arm/...) ?
And when you say "much faster", do you have figures to add to your commit message ?
Cheers.
-- Robert
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