Thank you, so how to enable RSS? I am using a 82576 4-port netcard with pf-ring 5.6.1 pfring-aware driver.
Alan > -----原始邮件----- > 发件人: "Alfredo Cardigliano" <[email protected]> > 发送时间: 2015年10月14日 星期三 > 收件人: [email protected] > 抄送: > 主题: Re: [Ntop-misc] Packet lose observed in ifconfig > > > > On 14 Oct 2015, at 07:56, 王勇 <[email protected]> wrote: > > > > Hi, all > > > > I have a box equipped with 32 cores (2 cpus and hyperthread is enabled) and > > a 4-port intel 82576 card. There are 2 nprobe running on this machine > > listening 2 ports which having about 200Mbps(less then 100kpps) on each of > > them. The pf-ring version is 5.6 in mode 2. > > > > what I observed about the packet dropping is: > > 1. the tot pkt lost in /proc/net/pfring/info is 0 > > /proc/net/pf_ring/info does not contain drop stats.. > > > 2. the tot packet drop in ifconfig for the port is not zero and keep > > increasing on the rate of several thousands packet a second. > > This means kernel is not able to move packets off the card fast enough. > > > 3. the num free slot remains above 0. so that means the nprobe is fast > > enough. > > Correct. > > > > > so, in this situation, what is the root cause of the packet drop, thank you > > for any comment! > > The NAPI mechanism seems to be the bottleneck, please try playing with RSS, > otherwise you should try with ZC drivers. > > Alfredo > > > > > Alan > > _______________________________________________ > > Ntop-misc mailing list > > [email protected] > > http://listgateway.unipi.it/mailman/listinfo/ntop-misc > > _______________________________________________ > Ntop-misc mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-misc
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