On Sep 9, 2015 4:19 PM, "Ananyev, Konstantin" <konstantin.ananyev at intel.com> wrote: > > Hi Thomas, > > > -----Original Message----- > > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Thomas Monjalon > > Sent: Wednesday, September 09, 2015 1:19 PM > > To: Zhang, Helin > > Cc: dev at dpdk.org > > Subject: Re: [dpdk-dev] [PATCH v1] ixgbe_pmd: forbid tx_rs_thresh above 1 for all NICs but 82598 > > > > 2015-08-25 20:13, Zhang, Helin: > > > Yes, I got the perfect answers. Thank you very much! > > > I just wanted to make sure the test case was OK with the limit of maximum number of descriptors, as I heard there is a hang issue on > > other NICs of using more descriptors than hardware allowed. > > > OK. I am still waiting for the answers/confirmation from x540 hardware designers. We need all agree on your patches to avoid risks. > > > > Helin, any news? > > Can we apply v4 of this patch? > > Unfortunately we are seeing a huge performance drop with that patch: > On my box bi-directional traffic (64B packet) over one port can't reach even 11 Mpps.
Konstantin, could u clarify - u saw "only" 11 Mpps with v3 of this patch which doesn't change the rs_thresh and only sets RS on every packet? What is the performance in the same test without this patch? > We are still doing some experiments and consultations with ND guys how we can overcome > this problem and keep performance intact. > > Konstantin
