On Wed, Sep 7, 2016 at 4:44 PM, John Fastabend via iovisor-dev <iovisor-...@lists.iovisor.org> wrote: > On 16-09-07 05:42 AM, Saeed Mahameed wrote: >> Previously we rang XDP SQ doorbell on every forwarded XDP packet. >> >> Here we introduce a xmit more like mechanism that will queue up more >> than one packet into SQ (up to RX napi budget) w/o notifying the hardware. >> >> Once RX napi budget is consumed and we exit napi RX loop, we will >> flush (doorbell) all XDP looped packets in case there are such. >> >> XDP forward packet rate: >> >> Comparing XDP with and w/o xmit more (bulk transmit): >> >> Streams XDP TX XDP TX (xmit more) >> --------------------------------------------------- >> 1 4.90Mpps 7.50Mpps >> 2 9.50Mpps 14.8Mpps >> 4 16.5Mpps 25.1Mpps >> 8 21.5Mpps 27.5Mpps* >> 16 24.1Mpps 27.5Mpps* >> > > Hi Saeed, > > How many cores are you using with these numbers? Just a single > core? Or are streams being RSS'd across cores somehow. >
Hi John, Right I should have been more clear here, numbers of streams refers to the active RSS cores. We just manipulate the number of rings with ethtool -L to test this. >> *It seems we hit a wall of 27.5Mpps, for 8 and 16 streams, >> we will be working on the analysis and will publish the conclusions >> later. >> > > Thanks, > John > _______________________________________________ > iovisor-dev mailing list > iovisor-...@lists.iovisor.org > https://lists.iovisor.org/mailman/listinfo/iovisor-dev
