Re: [dpdk-dev] [PATCH] config: set cache line as 128B in the generic arm64 config

[Thomas Monjalon <thomas@monjalon.net>]

28/04/2017 04:14, Jianbo Liu:
> On 27 April 2017 at 00:29, Jerin Jacob <jerin.jacob@caviumnetworks.com> wrote:
> > armv8 implementations may have 64B or 128B cache line.
> > Setting to the maximum available cache line size in generic config to
> > address minimum DMA alignment across all arm64 implementations.
> >
> > Increasing the cacheline size has no negative impact to cache invalidation
> > on systems with a smaller cache line.
> >
> > The need for the minimum DMA alignment has impact on functional aspects
> > of the platform so default config should cater the functional aspects.
> >
> > There is an impact on memory usage with this scheme, but that's not too
> > important for the single image arm64 distribution use case.
> >
> > The arm64 linux kernel followed the similar approach for single
> > arm64 image use case.
> > http://lxr.free-electrons.com/source/arch/arm64/include/asm/cache.h
> >
> > Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> 
> Acked-by: Jianbo Liu <jianbo.liu@linaro.org>

Applied, thanks