[dpdk-dev] [PATCH] net/virtio: enable packet data prefetch on x86

[Bruce Richardson]

On Wed, Nov 11, 2020 at 04:45:25PM +0100, David Marchand wrote:
> On Wed, Nov 11, 2020 at 4:40 PM Marvin Liu <yong.liu at intel.com> wrote:
> >
> > Data prefetch instruction can preload data into cpu’s hierarchical
> > cache before data access. Virtio datapath utilized this feature for
> > data access acceleration. As config RTE_PMD_PACKET_PREFETCH was
> > discarded, now packet data prefetch is enabled based on architecture.
> 
> IIUC, this config item was set for all architectures under make compilation.
> 
> $ git grep RTE_PMD_PACKET_PREFETCH v20.08 config/
> v20.08:config/common_base:CONFIG_RTE_PMD_PACKET_PREFETCH=y
> 
> Now that we switched to meson, it got lost and this patch only
> restores it for x86.
> Can other architectures check this?
> 
If it was globally enabled before, it probably should just be added to
config/rte_config.h file.

/Bruce