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</o:shapelayout></xml><![endif]--></head><body lang=KO link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>HI!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>As I enabled the packet profiling, packet drop was generated.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>The packet drop was confirmed by “packet.kernel_drop” in stats.log.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I want to always enable the packet profiling in my product, how can I improve?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I generated 160 Kpps(packet per sec) traffic and lost 30% of the packets. The size of each packet size is 64 bytes.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I have analyzed the source code and have found that packet drop will not occur if the SCProfilingPrintPacketProfile() function is not executed.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>How do I improve this function and are there any other improvement options?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Below is the hardware specification and suricata configuration information.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Hardware spec.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>CPU : Intel(R) Xeon(R) CPU E5-2660 v3 @ 2.60GHz<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> 10 cores, 20 threads<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Memory : 16G<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Ethernet : Intel Corporation 82580 Gigabit ( 1Gbps)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Suricata Version : 3.2.1<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>OS – linux debian 8<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>excute command : "suricata -c /etc/suricata/suricata.yaml --af-packet"<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>number of rules : 9000<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>suricata.yaml<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>af-packet:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> - interface: eth0<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> threads: auto<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> cluster-id: 99<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> cluster-type: cluster_flow<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> defrag: yes<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> use-mmap: yes<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> buffer-size: 64535<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> copy-mode: ips<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> copy-iface: eth1<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US> - interface: eth1<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> threads: auto<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> cluster-id: 98<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> cluster-type: cluster_flow<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> defrag: yes<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> use-mmap: yes<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> buffer-size: 64535<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> copy-mode: ips<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> copy-iface: eth0<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US> packets:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> # Profiling can be disabled here, but it will still have a<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> # performance impact if compiled in.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> enabled: yes<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> filename: packet_stats.log<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> append: yes<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US> # per packet csv output<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> csv:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US> # Output can be disabled here, but it will still have a<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> # performance impact if compiled in.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> enabled: yes<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> filename: packet_stats.csv<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Sincerely<o:p></o:p></span></p></div></body></html>