tcpdump mailing list archives
Re: Libpcap performance problem
From: Anders Broman <anders.broman () ericsson com>
Date: Wed, 28 Jan 2015 15:21:10 +0000
Hi, What version of libpcap are you using? Version >= 1.5.3 uses TPACKET_V3 which may give an capacity increase. Regards Anders -----Original Message----- From: tcpdump-workers [mailto:tcpdump-workers-bounces () lists tcpdump org] On Behalf Of Giray Simsek Sent: den 28 januari 2015 15:58 To: tcpdump-workers () lists tcpdump org Subject: [tcpdump-workers] Libpcap performance problem Hi, We are currently working on testing Linux network performance. We have two Linux machines in our test setup. Machine1 is the attacker machine from which we are sending SYN packets to Machine2 at a rate of 3million pps. We are able to receive these packets on Machine2's external interface and forward them through the internal interface without dropping any packets. So far no problems. However, when we start another app that captures traffic on Machine2's external interface using libpcap, the amount of traffic that is forwarded drops significantly. Obviously, this second libpcap app becomes a bottleneck. It can capture only about 800Kpps of traffic and only about 800Kpps can be forwarded in this case. This drop in the amount of forwarded traffic is not acceptable for us. Is there any way we can overcome this problem? Are there any settings on Os, ixgbe driver or libpcap that will allow us to forward all the traffic? Both machines are running Linux kernel 3.15. Thanks in advance. Giray _______________________________________________ tcpdump-workers mailing list tcpdump-workers () lists tcpdump org https://lists.sandelman.ca/mailman/listinfo/tcpdump-workers _______________________________________________ tcpdump-workers mailing list tcpdump-workers () lists tcpdump org https://lists.sandelman.ca/mailman/listinfo/tcpdump-workers
Current thread:
- Libpcap performance problem Giray Simsek (Jan 28)
- Re: Libpcap performance problem Anders Broman (Jan 28)
- Re: Libpcap performance problem Giray Simsek (Jan 29)
- Re: Libpcap performance problem Rick Jones (Jan 28)
- Re: Libpcap performance problem David Laight (Jan 28)
- Re: Libpcap performance problem Giray Simsek (Jan 29)
- Re: Libpcap performance problem David Laight (Jan 28)
- Re: Libpcap performance problem Anders Broman (Jan 28)