> -----Original Message----- > From: David Marchand <david.march...@redhat.com> > Sent: Wednesday, November 4, 2020 4:43 PM > To: Rong, Leyi <leyi.r...@intel.com> > Cc: Zhang, Qi Z <qi.z.zh...@intel.com>; dev <dev@dpdk.org> > Subject: Re: [PATCH] examples/l3fwd: enable multiple Tx queues on a lcore > > On Wed, Nov 4, 2020 at 9:34 AM Rong, Leyi <leyi.r...@intel.com> wrote: > > > -----Original Message----- > > > From: David Marchand <david.march...@redhat.com> > > > Sent: Wednesday, November 4, 2020 4:14 PM > > > To: Rong, Leyi <leyi.r...@intel.com> > > > Cc: Zhang, Qi Z <qi.z.zh...@intel.com>; dev <dev@dpdk.org> > > > Subject: Re: [PATCH] examples/l3fwd: enable multiple Tx queues on a > > > lcore > > > > > > If I count well, this is the v3 of the patch. > > > Please version your patches. > > > > The previous versions are set to superseded. As nothing changes with > > content on those versions, can start from this version? > > The commitlog changes even if the code itself did not change, so this is a > different patch. > Different patches mean different versions. > This shows that some work happened since the v1 submission. >
Agreed. > > > As there always has thoughput limit for per queue, on some performance > > test case by using l3fwd, the result will limited by the per queue > > thoughput limit. With multiple Tx queue enabled, the per queue thoughput > limit can be eliminated if the CPU core is not the bottleneck. > > Ah interesting. > Which nic has such limitations? > How much of an improvement can be expected from this? > > > -- > David Marchand The initial found was on XXV710 25Gb NIC, but suppose such issue can happen on more NICs as the high-end CPU per core boundary is higher than many NICs(except 100Gb and above) per queue performance boundary. The improvement can be about 1.8X with that case@1t2q. Leyi
