[dpdk-dev] DPDK 17.02 RC-3 performance degradation of ~10%

[De Lara Guarch, Pablo]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of De Lara Guarch,
> Pablo
> Sent: Tuesday, February 14, 2017 1:28 PM
> To: Thomas Monjalon; Hanoch Haim (hhaim)
> Cc: dev at dpdk.org; Mcnamara, John; Ido Barnea (ibarnea)
> Subject: Re: [dpdk-dev] DPDK 17.02 RC-3 performance degradation of ~10%
> 
> Hi,
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Thomas
> Monjalon
> > Sent: Tuesday, February 14, 2017 1:05 PM
> > To: Hanoch Haim (hhaim)
> > Cc: dev at dpdk.org; Mcnamara, John; Ido Barnea (ibarnea)
> > Subject: Re: [dpdk-dev] DPDK 17.02 RC-3 performance degradation of
> ~10%
> >
> > 2017-02-14 12:19, Mcnamara, John:
> > > From: Hanoch Haim (hhaim)
> > > > We (trex traffic generator project) upgrade DPDK version from 16.07
> to
> > > > 17.02arc-3 and we experienced a performance degradation on the
> > following
> > > > NICS:
> > [...]
> > >
> > > Could you do a git-bisect to identify the change that caused this?
> >
> > +1 for the bisect.
> > Please could you try to isolate the change causing the regression?
> 
> I reproduced the regression for i40e driver (3-4% degradation, not 10%).
> The commit that caused it was the following:
> 5ea0942129a4 ("net/i40e: add packet type metadata in vector Rx")
> 
> This commit was introduced in 16.11, and not in 17.02. This caused some
> performance degradation
> in the i40e vector RX, due to the addition of packet type parsing in the
> PMD.
> 
> Thanks,
> Pablo

Sorry, I was talking about RX and not TX, so this is probably not valid then.

Pablo