[dpdk-dev] [PATCH v6 RESEND] eal: add tsc_hz to rte_mem_config

Bruce Richardson bruce.richardson at intel.com
Tue Oct 8 10:38:33 CEST 2019


On Mon, Oct 07, 2019 at 08:28:21AM -0700, Jim Harris wrote:
> This ensures secondary processes never have to
> calculate the TSC rate themselves, which can be
> noticeable in VMs that don't have access to
> arch-specific detection mechanism (such as
> CPUID leaf 0x15 or MSR 0xCE on x86).
> 
> Since rte_mem_config is now internal to the rte_eal
> library, we can add tsc_hz without ABI breakage
> concerns.
> 
> Reduces rte_eal_init() execution time in a secondary
> process from 165ms to 66ms on my test system.
> 
> Signed-off-by: Jim Harris <james.r.harris at intel.com>
> ---
This seems a good idea to me.

Acked-by: Bruce Richardson <bruce.richardson at intel.com>


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