[dpdk-dev] [PATCH] config: make AVX and AVX512 configurable
zhihong.wang at intel.com
Thu Apr 27 11:18:21 CEST 2017
> -----Original Message-----
> From: Thomas Monjalon [mailto:thomas at monjalon.net]
> Sent: Thursday, April 27, 2017 5:08 PM
> To: Wang, Zhihong <zhihong.wang at intel.com>; Richardson, Bruce
> <bruce.richardson at intel.com>
> Cc: dev at dpdk.org; yuanhan.liu at linux.intel.com
> Subject: Re: [dpdk-dev] [PATCH] config: make AVX and AVX512 configurable
> 27/04/2017 18:34, Zhihong Wang:
> > Making AVX and AVX512 configurable is useful for performance and power
> > testing.
> > The similar kernel patch at https://patchwork.kernel.org/patch/9618883/.
> > +#
> > +# Recognize/ignore the AVX/AVX512 CPU flags for performance/power
> > +#
> > +CONFIG_RTE_ENABLE_AVX=y
> > +CONFIG_RTE_ENABLE_AVX512=n
> It is disabling AVX512 in default configuration.
> Please explain this behaviour change.
Though AVX512 rte_memcpy has been in DPDK for quite a while it's still
unproven in hardware with rich use cases. Mark it as experimental for
now, user can enable it for their own testing.
Will enable it with enough field tests and possible optimization.
Should I add the explanation in commit log, or comments in the source,
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