Re: [dpdk-dev] [PATCH 0/9] mbuf: structure reorganization

[Olivier Matz <olivier.matz@6wind.com>]

On Thu, 30 Mar 2017 10:31:08 +0100, Bruce Richardson <bruce.richardson@intel.com> wrote:
> On Wed, Mar 29, 2017 at 09:09:23PM +0100, Bruce Richardson wrote:
> > On Wed, Mar 29, 2017 at 05:56:29PM +0200, Olivier Matz wrote:  
> > > Hi,
> > > 
> > > Does anyone have any other comment on this series?
> > > Can it be applied?
> > > 
> > > 
> > > Thanks,
> > > Olivier
> > >   
> > 
> > I assume all driver maintainers have done performance analysis to check
> > for regressions. Perhaps they can confirm this is the case.
> > 
> > 	/Bruce  
> > >   
> In the absence, of anyone else reporting performance numbers with this
> patchset, I ran a single-thread testpmd test using 2 x 40G ports (i40e)
> driver. With RX & TX descriptor ring sizes of 512 or above, I'm seeing a
> fairly noticable performance drop. I still need to dig in more, e.g. do
> an RFC2544 zero-loss test, and also bisect the patchset to see what
> parts may be causing the problem.
> 
> Has anyone else tried any other drivers or systems to see what the perf
> impact of this set may be?

I did, of course. I didn't see any noticeable performance drop on
ixgbe (4 NICs, one port per NIC, 1 core). I can replay the test with
current version.


Olivier