[dpdk-dev] [PATCH 0/2] fix performance/cache resource issues with 128-byte cache line targets

[Thomas Monjalon]

2015-12-07 12:56, Jerin Jacob:
> On Sun, Dec 06, 2015 at 05:30:50PM +0100, Thomas Monjalon wrote:
> > 2015-12-06 21:29, Jerin Jacob:
> > > This patchset fixes performance/cache resource issues with 128-byte cache line targets
> > > found in mbuf and bitmap DPDK libraries
> > > 
> > > Currently, we have two DPDK targets(ThunderX and ppc_64) which are based on
> > > 128-bytes cache line size target.
> > 
> > When introducing IBM Power8, we failed to clean the cache line size definition.
> > I promised to not forget this issue in this thread with Neil:
> > 	http://dpdk.org/ml/archives/dev/2014-December/009439.html
> > 
> > It is defined in
> > 	config/defconfig_*
> > 	mk/machine/*/rte.vars.mk
> > 	mk/arch/*/rte.vars.mk
> > 	rte_memory.h
> > 	rte_kni_common.h
> > 
> > It should be defined only in the config files.
> > When we will introduce a configure script, we should be able to detect it.
> > 
> > Please Jerin, as ThunderX maintainer, may you help to fix this old mess?
> 
> Yes Thomas, I will takeup this issue when we will have configure script.

I thought we could start setting the value in only one place.
The detection in configure script would be another step.

> apart from that, content of the this patch will be still valid
> as the fix going to be generating cache line define from the config file.