[dpdk-dev] [PATCH 2/4] virtio: introduce RTE_LIBRTE_VIRTIO_INC_VECTOR

Jerin Jacob jerin.jacob at caviumnetworks.com
Mon Jun 27 16:48:31 CEST 2016

On Mon, Jun 27, 2016 at 04:19:57PM +0200, Thomas Monjalon wrote:
> 2016-06-27 17:24, Jerin Jacob:
> > --- a/config/common_base
> > +++ b/config/common_base
> > @@ -267,6 +267,7 @@ CONFIG_RTE_LIBRTE_VIRTIO_DEBUG_RX=n
> I don't remember what means INC_VECTOR?
> Why a config option is needed for vector implementations?

I thought of adding additional configuration option(INC_VECTOR) _apart_ from
cpu flag based scheme in the patch because even though if a given platform
has cpu instruction support, in some platforms scalar version may
perform well wrt vector version(based on instruction latency, emulation required or not
etc). So a top level flag INC_VECTOR, can override the vector selection
for a given platform if required.

Regarding INC_VECTOR(INC in vector configuration name, I have no idea, I
followed the existing flags)
$ grep "INC_VECTOR" config/common_base


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