Got it. Thanks for your guidance!
? 2016-09-20 22:41:36?"Andriy Berestovskyy" <aber at semihalf.com> ??? >AFAIR Intel hardware should do the 10Gbit/s line rate (i.e. ~14,8 >MPPS) with one flow and LPM quite easily. Sorry, I don't have numbers >to share at hand. > >Regarding the tool please see the pktgen-dpdk or TRex. Regarding the >number of flows and overall benchmarking methodology - please see >RFC2544. > >Andriy > > >On Tue, Sep 20, 2016 at 12:47 PM, ?? <zhangwqh at 126.com> wrote: >> Thanks so much for your reply! Usually how did you test lpm performance >> with variety of destination addresses? use which tool send the traffic? how >> many flows rules will you add? what's the performance you get? >> >> >> >> >> >> >> At 2016-09-20 17:41:13, "Andriy Berestovskyy" <aber at semihalf.com> wrote: >>>Hey, >>>You are correct. The LPM might need just one (TBL24) or two memory >>>reads (TBL24 + TBL8). The performance also drops once you have a >>>variety of destination addresses instead of just one (cache misses). >>> >>>In your case for the dst IP 192.168.1.2 you will have two memory reads >>>(TBL24 + TBL8), because 192.168.1/24 block has the more specific route >>>192.168.1.1/32. >>> >>>Regards, >>>Andriy >>> >>>On Tue, Sep 20, 2016 at 12:18 AM, ?? <zhangwqh at 126.com> wrote: >>>> Hi all, >>>> >>>> >>>> Does anyone test IPv4 performance? If so, what's the throughput? I can >>>> get almost 10Gb with 64 byte packets. But before the test, I would expect >>>> it will be less than 10G. I thought the performance will not be affected >>>> by >>>> the number of rule entires. But the throughput will be related to whether >>>> the flow needs to check the second layer table : TBL8. Is my understanding >>>> correct? I added this flow entries following this link: >>>> http://www.slideshare.net/garyachy/understanding-ddpd-algorithmics >>>> slide 10, >>>> >>>> >>>> >>>> struct ipv4_lpm_route ipv4_lpm_route_array[] = { >>>> >>>> {IPv4(192, 168, 0, 0), 16, 0}, >>>> >>>> {IPv4(192, 168, 1, 0), 24, 1}, >>>> >>>> {IPv4(192, 168, 1, 1), 32, 2} >>>> >>>> }; >>>> >>>> send the flow with dst IP: >>>> >>>> 192.168.1.2 >>>> >>>> It should check the second layer table. But the performance is still 10G. >>>> Does any part go wrong with my setup? Or it really can achieve 10G with 64 >>>> byte packet size. >>>> >>>> Thanks, >>>> >>>> >>> >>> >>> >>>-- >>>Andriy Berestovskyy >> >> >> >> > > > >-- >Andriy Berestovskyy
