> -----Original Message----- > From: Thomas Monjalon [mailto:tho...@monjalon.net] > Sent: Thursday, April 27, 2017 5:08 PM > To: Wang, Zhihong <zhihong.w...@intel.com>; Richardson, Bruce > <bruce.richard...@intel.com> > Cc: dev@dpdk.org; yuanhan....@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 > testing > > +# > > +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, or both?
