Re: [dpdk-dev] [PATCH 5/5] examples/l3fwd: add neon support for l3fwd

["Sekhar, Ashwin" <Ashwin.Sekhar@cavium.com>]

On Thu, 2017-05-04 at 16:42 +0800, Jianbo Liu wrote:
> Hi Ashwin,
> 
> On 3 May 2017 at 13:24, Jianbo Liu <jianbo.liu@linaro.org> wrote:
> > 
> > Hi Ashwin,
> > 
> > On 2 May 2017 at 19:47, Sekhar, Ashwin <Ashwin.Sekhar@cavium.com>
> > wrote:
> > > 
> > > Hi Jianbo,
> > > 
> > > I tested your neon changes on thunderx. I am seeing a performance
> > > regression of ~10% for LPM case and ~20% for EM case with your
> > > changes.
> > > Did you see improvement on any arm64 platform with these changes.
> > > If
> > > yes, how much was the improvement?
> > Thanks for your reviewing and testing.
> > For some reason, I have not done much with the performance testing.
> > I'll send a new version later after tuning the performance.
> > 
> Can you tell me how did you test?
Built with following commands.
make config T=arm64-thunderx-linuxapp-gcc
make -j32

Tested LPM with
sudo ./examples/l3fwd/build/l3fwd -l 9,10  --master-lcore 9  -- -p 0x1 --config="(0,0,10)"

Tested EM with
sudo ./examples/l3fwd/build/l3fwd -l 9,10  --master-lcore 9  -- -p 0x1 --config="(0,0,10)" -E

> My testing shows that EM case is much better, while LPM is almost the
> same as before.
Could you please tell on which arm64 processor/platform you tested.
Also how much was the percentage increase in performance for EM ?

> Thanks!
> Jianbo