[dpdk-dev] [PATCH v6 3/4] qat: use WC store to update queue tail registers

Trahe, Fiona fiona.trahe at intel.com
Mon Jul 13 14:52:24 CEST 2020



> -----Original Message-----
> From: Bruce Richardson <bruce.richardson at intel.com>
> Sent: Monday, July 13, 2020 1:45 PM
> To: Nicolau, Radu <radu.nicolau at intel.com>
> Cc: dev at dpdk.org; Xing, Beilei <beilei.xing at intel.com>; Guo, Jia <jia.guo at intel.com>; Ananyev, Konstantin
> <konstantin.ananyev at intel.com>; jerinjacobk at gmail.com; david.marchand at redhat.com; Trahe, Fiona
> <fiona.trahe at intel.com>; Zhao1, Wei <wei.zhao1 at intel.com>
> Subject: Re: [PATCH v6 3/4] qat: use WC store to update queue tail registers
> 
> On Mon, Jul 13, 2020 at 01:27:26PM +0100, Radu Nicolau wrote:
> > Performance improvement: use a write combining store
> > instead of a regular mmio write to update queue tail
> > registers.
> >
> > Signed-off-by: Radu Nicolau <radu.nicolau at intel.com>
> > ---
> minor nit, I think the subject prefix on the patch should be crypto/qat.
when it affects all qat PMDs, i.e. crypto sym, crypto asym and compression, as
this does we usually use drivers/qat


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