Good point. as a comparison: tcpdump -w /dev/null can handle up to 750Mbps, where sending machine's speed limit reached. I think it should be able to handle line rate.
Are those two packages lighter/faster than gopacket? Thanks, Chun On Friday, May 26, 2017 at 12:37:55 PM UTC-4, Egon wrote: > > As a baseline measurement I suggest writing the same code in C; this shows > how much your VM / config / machine can handle. > > With gopacket -- use src.NextPacket instead of Packets. > > There are also: https://github.com/akrennmair/gopcap and > https://github.com/miekg/pcap > > + Egon > > On Friday, 26 May 2017 19:01:20 UTC+3, Chun Zhang wrote: >> >> Hi, All, >> >> I am trying to write a small program to handle packets coming from a GigE >> wire. The testing code snip is as below. >> >> The problem I am facing is that this is extremely slow, can only handle >> up to 250Mbps-ish traffic with normal ipv4 sized packets, anything above >> that resulting significant packet drop. Note that I am doing nothing with >> the packet at this moment. If I try to do any packet processing, then >> apparently it gets slower. >> >> Has anybody measured the efficiency of the gopacket package? Is there any >> other faster alternatives? >> >> PS: the host machine is an ubuntu VM with 12-core and 12G memory, but >> looks only 2 cores are used for this program. >> >> Thanks, >> Chun >> >> >> >> // Open device >> handle, err = pcap.OpenLive(device, snapshot_len, promiscuous, timeout) >> if err == nil { >> Info.Println("Open interface ", device, "successfully") >> >> } >> defer handle.Close() >> >> >> //fmt.Println("In the deafult reading case ", time.Now()) >> // Use the handle as a packet source to process all packets >> packetSource := gopacket.NewPacketSource(handle, handle.LinkType()) >> Info.Println("pcketsourc is ", packetSource, time.Now()) >> for packet := range packetSource.Packets() { >> >> Debug.Println("-------------------------------------------------------------------") >> count++ >> Warning.Println("packet count ", count) >> >> // write to a pcap for testing >> /*err = w.WritePacket(packet.Metadata().CaptureInfo, >> packet.Data()) >> if err != nil { >> fmt.Println(err) >> }*/ >> >> continue >> >> -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
